Thematische Bibliographien / IsoSPI

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  2. Dissertationen
  3. Bücher
  4. Buchteile
  5. Konferenzberichte
  6. Berichte der Organisationen

Auswahl der wissenschaftlichen Literatur zum Thema „IsoSPI“

Autor: Grafiati
Veröffentlicht am 23. Juni 2021
Zuletzt aktualisiert am 7. Februar 2022

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Zeitschriftenartikel zum Thema "IsoSPI"

1

YE, W. „INFLUENCE OF ISOSPIN ON PRESCISSION PARTICLE EMISSION OF LIGHT FISSIONING SYSTEMS“. International Journal of Modern Physics E 12, Nr. 06 (Dezember 2003): 817–26. http://dx.doi.org/10.1142/s0218301303001600.

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The isospin effect on particle emission for fissioning isobaric sources of 110Tc, 110Pd, 110In and for isotopic sources of 110,117,124In is explored in the framework of the Smoluchowski equation. A statistical model including dissipation is employed to study particle emission in asymmetric and symmetric fission of the In nucleus with different isospins. Calculations show that for a fissioning nucleus which has a larger isospin, charged particle multiplicities are no longer sensitive to dissipation strength or the fission time scale. Hence, for those systems with very high isospins, protons and α particles cannot be used as probes of the dissipation in the fission of hot nuclei. This conclusion does not depend on the mass asymmetry of the fission process.
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2

FARIA DA VEIGA, PAULO A., MICHAEL O'CARROLL und ANTÔNIO FRANCISCO NETO. „ISOSPIN–SPIN INTERCHANGE SYMMETRY AND TWO-BARYON BOUND STATES IN (3+1)-DIMENSIONAL LATTICE QCD WITH TWO-FLAVORS AND STRONG COUPLING“. International Journal of Modern Physics A 26, Nr. 25 (10.10.2011): 4387–404. http://dx.doi.org/10.1142/s0217751x11054577.

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We determine two-baryon bound states in a 3+1 lattice QCD model with improved Wilson action and two flavors. We work in the strong coupling regime: small hopping parameter κ > 0 and much smaller plaquette coupling β > 0. In this regime, it is known that the low-lying energy–momentum spectrum is comprised of baryons and mesons with asymptotic masses -3 ln κ and -2 ln κ, respectively. We show that the dominant baryon–baryon interaction is an order κ2 space-range-one [Formula: see text]-exchange potential. We also show that this interaction has an important and novel isospin–spin interchange symmetry relating the various possible bound states, and then governing the two-baryon spectral structure. Letting S(I) denote the total spin (total isospin) of the two-baryon bound states, S, I = 0, 1, 2, 3, we find bound states with asymptotic binding energy κ2/4, for I+S = 1, 3, and 4 (here, with I = S = 2); κ2/12, for I+S = 0, 2, 4 and 3 (here, with I = 1, 2). In particular, we show that the two-baryon spectrum contains deuteron (I = 0), diproton (I = 1) and dineutron (I = 1)-like bound states. Using the isospin–spin symmetry, we can circumvent the lack of spin symmetry of the lattice action and show they all have the same asymptotic binding energy, namely κ2/4. Our analysis uses convenient two and four-baryon correlations, their spectral representations and a lattice Bethe–Salpeter equation, which is solved in a ladder approximation. For the isospin, spin part of the interaction, we obtain a permanent representation which describes the interaction of the individual spins and isospins of the quarks of one baryon with those of the other baryon.
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3

ROBSON, B. A. „RELATION BETWEEN STRONG AND WEAK ISOSPIN“. International Journal of Modern Physics E 13, Nr. 05 (Oktober 2004): 999–1018. http://dx.doi.org/10.1142/s0218301304002521.

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The relation between strong isospin I and weak isospin i is discussed. In particular an equation between the third components I3 and i3 is given. This relation indicates that the strong isospin and weak isospin symmetries are both SU (2) subgroups of a new SU (3) symmetry underlying the structure of leptons and quarks.
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4

LI, QINGFENG, und ZHUXIA LI. „THE ISOSPIN DISTRIBUTION OF FRAGMENTS IN REACTIONS 96Ru + 96Ru, 96Ru + 96Zr, 96Zr + 96Ru, and 96Zr + 96Zr AT BEAM ENERGY 400 AMeV“. Modern Physics Letters A 17, Nr. 07 (07.03.2002): 375–85. http://dx.doi.org/10.1142/s0217732302006618.

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The isospin distribution of particles and fragments in collisions 96Ru + 96Ru, 96Ru + 96Zr, 96Zr + 96Ru and 96Zr + 96Zr at beam energy 400 AMeV is studied with isospin-dependent QMD model. We find that the rapidity distribution of differential neutron–proton counting in neutron rich nucleus–nucleus collisions at intermediate energies is sensitive to the isospin-dependent part of nuclear potential. The study of the N/Z ratio of nucleons, light charged particles (LCP) and intermediate mass fragments (IMF) shows that the isospin-dependent part of nuclear potential drives IMF to be more isospin symmetric and emitted nucleons to be more neutron rich. From the study of the time evolution of the isospin distribution in emitted nucleons, LCP and IMF we find that neutrons diffuse much faster than protons at the beginning and the final isospin distribution is a result of dynamical balance of symmetry potential and Coulomb force under the charge conservation.
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Jain, Ashok Kumar, und Swati Garg. „Isospin Conservation in Neutron Rich Systems of Heavy Nuclei“. EPJ Web of Conferences 178 (2018): 05007. http://dx.doi.org/10.1051/epjconf/201817805007.

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It is generally believed that isospin would diminish in its importance as we go towards heavy mass region due to isospin mixing caused by the growing Coulomb forces. However, it was realized quite early that isospin could become an important and useful quantum number for all nuclei including heavy nuclei due to neutron richness of the systems [1]. Lane and Soper [2] also showed in a theoretical calculation that isospin indeed remains quite good in heavy mass neutron rich systems. In this paper, we present isospin based calculations [3, 4] for the fission fragment distributions obtained from heavy-ion fusion fission reactions. We discuss in detail the procedure adopted to assign the isospin values and the role of neutron multiplicity data in obtaining the total fission fragment distributions. We show that the observed fragment distributions can be reproduced rather reasonably well by the calculations based on the idea of conservation of isospin. This is a direct experimental evidence of the validity of isospin in heavy nuclei, which arises largely due to the neutron-rich nature of heavy nuclei and their fragments. This result may eventually become useful for the theories of nuclear fission and also in other practical applications.
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RAFALSKI, M., W. SATUŁA und J. DOBACZEWSKI. „ISOSPIN MIXING OF ISOSPIN-PROJECTED SLATER DETERMINANTS: FORMALISM AND PRELIMINARY APPLICATIONS“. International Journal of Modern Physics E 18, Nr. 04 (April 2009): 958–64. http://dx.doi.org/10.1142/s0218301309013105.

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We report on the development of a new theoretical tool that allows for isospin projection of Slater determinants and we present its first applications. In particular, we determine the isospin mixing in ground states of N = Z nuclei and discuss its dependence on the size of the harmonic-oscillator basis used in the calculations. We also discuss the unphysical contribution to the isospin mixing caused by the spurious isospin-symmetry breaking inherent to the mean-field approach. We show that these contributions may be as large as 30% of the value of the isospin-mixing parameter.
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Li, Bao-An, Che Ming Ko und Wolfgang Bauer. „Isospin Physics in Heavy-Ion Collisions at Intermediate Energies“. International Journal of Modern Physics E 07, Nr. 02 (April 1998): 147–229. http://dx.doi.org/10.1142/s0218301398000087.

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In nuclear collisions induced by stable or radioactive neutron-rich nuclei a transient state of nuclear matter with an appreciable isospin asymmetry as well as thermal and compressional excitation can be created. This offers the possibility to study the properties of nuclear matter in the region between symmetric nuclear matter and pure neutron matter. In this review, we discuss recent theoretical studies of the equation of state of isospin-asymmetric nuclear matter and its relations to the properties of neutron stars and radioactive nuclei. Chemical and mechanical instabilities as well as the liquid-gas phase transition in asymmetric nuclear matter are investigated. The in-medium nucleon-nucleon cross sections at different isospin states are reviewed as they affect significantly the dynamics of heavy ion collisions induced by radioactive beams. We then discuss an isospin-dependent transport model, which includes different mean-field potentials and cross sections for the proton and neutron, and its application to these reactions. Furthermore, we review the comparisons between theoretical predictions and available experimental data. In particular, we discuss the study of nuclear stopping in terms of isospin equilibration, the dependence of nuclear collective flow and balance energy on the isospin-dependent nuclear equation of state and cross sections, the isospin dependence of total nuclear reaction cross sections, and the role of isospin in preequilibrium nucleon emissions and subthreshold pion production.
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Garg, Swati, und Ashok Kumar Jain. „Does Compound Nucleus remember its Isospin- An Evidence from the Fission Widths“. EPJ Web of Conferences 178 (2018): 05008. http://dx.doi.org/10.1051/epjconf/201817805008.

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We present an evidence of isospin effects in nuclear fission by comparing the fission widths for reactions involving different isospin states of the same compound nucleus (CN). Yadrovsky [1] suggested this possibility in 1975. Yadrovsky obtained the fission widths for two reaction data sets, namely 206Pb(α,f) and 209Bi(p,f), both leading to same CN, and concluded that “a nucleus remembers the isospin value of the nuclear states leading to fission”. We obtain the fission decay widths for both the T0 + ½ and T0 − ½ states of CN by using two appropriate reaction data sets. We then compare the fission widths for the two isospin states of CN. More specifically, we have chosen the combination of 206Pb(α,f) and 209Bi(p,f) same as presented in Yadrovsky’s paper [1] in this study. A significant difference between the ratios of fission decay widths to total decay widths for different isospin values suggests that isospin plays an important role in fission.
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DURGANANDINI, P. „SU(2) WZW THEORIES WITH HERMITIAN PERTURBATIONS“. Modern Physics Letters A 06, Nr. 36 (30.11.1991): 3349–58. http://dx.doi.org/10.1142/s0217732391003869.

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We show the existence of higher order conserved quantities of isospin 1 (with spin 0,2,4,6,…) and isospin 0,2 (with spin 1,3,5,7,…) for the k=2 SU(2) WZW theory perturbed by the singlet combination of the isospin 1 primary field. We also show the possible existence of conserved isospin 0 current with spin 3 in the k→∞ limit. We also analyze these theories for finite k(≥3) and show that at least by counting arguments there exist no higher conserved quantities in these cases.
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Liu, He, und Jun Xu. „Isospin Effect on Baryon and Charge Fluctuations from the pNJL Model“. Universe 7, Nr. 1 (31.12.2020): 6. http://dx.doi.org/10.3390/universe7010006.

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We have studied the possible isospin corrections on the skewness and kurtosis of net-baryon and net-charge fluctuations in the isospin asymmetric matter formed in relativistic heavy-ion collisions at RHIC-BES energies, based on a 3-flavor Polyakov-looped Nambu–Jona–Lasinio model. With typical scalar–isovector and vector–isovector couplings leading to the splitting of u and d quark chiral phase transition boundaries and critical points, we have observed considerable isospin effects on the susceptibilities, especially those of net-charge fluctuations. Reliable experimental measurements at even lower collision energies are encouraged to confirm the observed isospin effects.
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Dissertationen zum Thema "IsoSPI"

1

Malachowska, Julia, und Miko Nore. „Emulation of Analog Front-End isoSPI communication for Battery Management Systems“. Thesis, KTH, Mekatronik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-297789.

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This study aims to investigate how an emulator could be developed as a testing tool for Battery Management Systems (BMS) by emulating the Analog Front­end (AFE) circuit communicating with a control unit for monitoring of Lithium­Ion Batteries. All of the research was conducted in the context of the company Northvolt. By analysing data collected through a questionnaire, it was evident that an emulator testing tool could potentially make the BMS development process significantly more efficient. A demonstrator was developed as a part of the study. It fulfilled almost all of the requirements initially stated, but required the control unit to send commands in a fixed sequence, which the current BMS control unit did not. A fixed sequence would however enable the incorporation of the developed emulator, as well as introducing other advantages such as predictability. The study showed that the most important factor to consider for developing an AFE communication emulator for BMS testing was robustness and repeatability of the timings of the communication signals.
Syftet med denna studie var att undersöka hur ett testverktyg baserat på en emulator skulle kunna utvecklas för batteristyrsystem. Studien genomfördes på batteriföretaget Northvolt. Genom att analysera data insamlad via ett frågeformulär framgick det tydligt att ett testverktyg baserat på en emulator hade god potential att göra utvecklingsprocessen av batteristyrsystem mer effektiv. En prototyp utvecklades som en del av studien. Denna uppfyllde nästan alla de initialt uppsatta kraven, men var anpassad för kommunikation i en fix sekvens, till skillnad från det aktuella systemet hos företaget. Via studien fann man att implementationen av en fix kommunikationssekvens skulle medföra önskvärda egenskaper hos systemet såsom förutsägbarhet. Vidare visade studien att den viktigaste faktorn att ta i beaktning för utveckling av en emulator var robusthet och repeterbarhet hos timingen av kommunikationssignalerna. Detta eftersom kommunkationen mellan enheter förlitar sig på korrekt timing av varje skickad bit för korrekt inlästa meddelanden.
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2

MALACHOWSKA, JULIA, und MIKO NORE. „Emulation of Analog Front-End isoSPI communication for Battery Management Systems“. Thesis, KTH, Skolan för industriell teknik och management (ITM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-299264.

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This study aims to investigate how an emulator could be developed as a testing tool for Battery Management Systems (BMS) by emulating the Analog Front-end (AFE) circuitcommunicating with a control unit for monitoring of Lithium-Ion Batteries. All of the research was conducted in the context of the company Northvolt. By analysing data collected through a questionnaire, it was evident that an emulator testing tool could potentially make the BMS development process significantly more efficient. A demonstrator was developed as a part of the study. It fulfilled almost all of the requirements initially stated, but required the control unit to send commands in a fixed sequence, which the current BMS control unit did not. A fixed sequence would however enable the incorporation of the developed emulator, as well as introducing other advantages such as predictability. The study showed that the most important factor to consider for developing an AFE communication emulator for BMS testing was robustness and repeatability of the timings of the communication signals.
Syftet med denna studie var att undersöka hur ett testverktyg baserat på en emulator skulle kunna utvecklas för batteristyrsystem. Studien genomfördes på batteriföretaget Northvolt. Genom att analysera data insamlad via ett frågeformulär framgick det tydligt att ett testverktyg baserat på en emulator hade god potential att göra utvecklingsprocessen av batteristyrsystem mer effektiv. En prototyp utvecklades som en del av studien. Denna uppfyllde nästan alla de initialt uppsatta kraven, men var anpassad för kommunikation i en fix sekvens, till skillnad från det aktuella systemet hos företaget. Via studien fann man att implementationen av en fix kommunikationssekvens skulle medföra önskvärda egenskaper hos systemet såsom förutsägbarhet. Vidare visade studien att den viktigaste faktorn att ta i beaktning för utveckling av en emulator var robusthet och repeterbarhet hos timingen av kommunikationssignalerna. Detta eftersom kommunkationen mellan enheter förlitar sig på korrekt timing av varje skickad bit för korrekt inlästa meddelanden.
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3

Juillet, Olivier. „Symetries nucleaires a faible isospin“. Caen, 1999. http://www.theses.fr/1999CAEN2057.

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Avec le developpement des faisceaux radioactifs, un interet particulier est actuellement porte aux noyaux exotiques riches en protons. Ces structures offrent en effet la possibilite de developper une superfluidite proton-neutron dont l'importance vis a vis des correlations d'appariement entre nucleons identiques fait l'objet de nombreuses etudes theoriques. Le travail presente propose precisement d'aborder ce probleme dans le cadre d'une approche algebrique basee sur une symetrie su(4) de wigner combinant les degres de liberte de pseudo-spin et d'isospin. Apres avoir repris en detail les implementations de la theorie des groupes en mecanique quantique, la pertinence de la classification pseudo-su(4) est directement montree au niveau des etats realistes du modele en couches. Ses consequences au niveau des masses et des transitions de decroissance sont egalement analysees. Sa realisation partielle en bosons de moment orbital nul est de plus utilisee pour mettre en evidence un certain nombre de phenomenes physiques specifiques a la ligne n = z comme la condensation en structures de type ou la destruction par le potentiel spin-orbite des correlations superfluides isoscalaires. Enfin, un autre schema de bosonisation incluant des degres de liberte quadrupolaires (modele ibm-4) est teste pour la premiere fois en diagonalisant un hamiltonien complet deduit d'une interaction realiste du modele en couches. La qualite des resultats obtenus, plus particulierement pour les noyaux impair-impair, permet raisonnablement d'envisager l'utilisation de cette approximation en bosons comme alternative aux approches fermioniques standard pour elucider la structure collective de la ligne exotique n z = 28-50.
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Farnea, Enrico. „Spectroscopic studies of isospin mixing in 64Ge“. Thesis, University of Surrey, 2001. http://epubs.surrey.ac.uk/844488/.

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The high-spin states of the nucleus 64Ge have been investigated using the GASP and the EUROBALL arrays of high-purity germanium detectors. In order to achieve the required experimental sensitivity, special selecting devices were used, namely a highly efficient array of liquid scintillators to detect neutrons and the ISIS Si-ball to detect light charged particles, which has been developed in the present work. A detailed decay scheme for 64Ge has been deduced, assigning spins and parities to the levels through a Directional Correlation from Oriented states analysis, an Angular Distribution analysis and a Polarization Correlation from Oriented states analysis. The character of an intense 1665 keV transition, previously reported as a stretched electric dipole with a small multipole mixing ratio, has been established as an electric dipole with a large multipole mixing ratio. The electric dipole strength has been measured using EUROBALL coupled to an early implementation of the EUCLIDES Si-ball and with the Koln plunger device, allowing an experimental estimate of the isospin mixing probability in 64Ge.
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5

Lam, Yek Wah. „Isospin symmetry breaking in sd shell nuclei“. Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14446/document.

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Dans cette thèse, nous avons développé une approche microscopique de la description des effets de la brisure de symétrie d’isospin dans les noyaux de la couche sd. Le travail est effectué dans le cadre du modèle en couches.Nous avons ajouté à un Hamiltonien nucléaire traditionnel, qui conserve l’isospin, l’interaction de Coulomb et le potentiel de type Yukawa d'échange de mésons pour modéliser les forces nucléaires dépendantes de la charge. La base de données sur les coefficients expérimentaux de l'équation des multiplets de masse isobariques (IMME) a été mise au point dans le cadre de cette thèse et a été utilisée pour ajuster les paramètres de l’hamiltonien. L'hamiltonien ainsi construit fournit une description théorique très précise du mélange d’isospin dans les états nucléaires. Nous montrons la pertinence de cette approche dans deux applications importantes : (i) le calcul des amplitudes d'émission de proton interdites par isospin, essentiels dans le cadre d’astrophysique nucléaire et (ii) le calcul de corrections (dues au mélange d'isospin) aux transitions bêta superpermises du type Fermi, cruciales pour les tests des symétries fondamentales du Modèle Standard de l’interaction électrofaible
In the thesis, we develop a microscopic approach to describe theisospin-symmetry breaking effects in sd-shell nuclei.The work is performed within the nuclear shell model.A realistic isospin-conserving Hamiltonian is supplementedby a charge-dependent part consisting of the Coulomb interaction andYukawa-type meson exchange potentials to model charge-dependent forces ofnuclear origin. The extended database of the experimental isobaric mass multiplet equation coefficients is compiled during the thesis work and is used in a fit of the Hamiltonian parameters.The constructed Hamiltonian provides an accurate theoretical description ofthe isospin mixing nuclear states. A specific behaviour of the IMME coefficients have been revealed.We present two important applications (i) calculations of isospin-forbiddenproton emission amplitudes, which is often of interest for nuclearastrophysics, and (ii) calculation on corrections to nuclear Fermi beta decay, which is crucial for the tests of fundamental symmetries of the weak interaction
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Portelli, Antonin. „Nonpertubative quantum chromodynamics and isospin symmetry breaking“. Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4110.

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Depuis les années 1930, on sait que le noyau des atomes est composé de deux types de particules: les protons et les neutrons. Ces deux particules sont très similaires: d'une part le neutron est subtilement plus lourd (un pour mille) que le proton et d'autre part le proton porte une charge électrique positive tandis que le neutron est neutre. La petite différence de masse entre le neutron et le proton fourni l'énergie suffisante pour autoriser désintégration où un neutron se désintègre en un proton en émettant un électron et un anti-neutrino électronique. Aussi, le fait que le proton ne se désintègre pas assure la stabilité de l'atome d'hydrogène. De plus, on sait empiriquement que les paramètres de la désintégration déterminent la composition des noyaux d'atomes stables plus lourds que l'hydrogène. Il est donc raisonnable de penser que si la différence de masse entre le neutron et le proton était de signe opposé ou seulement légèrement différente, l'Univers visible serait surement très différent de celui que l'on connait. Il est donc essentiel de comprendre l'origine de cette différence de masse à partir des principes premiers de la physique. C'est à ce problème, et à des problèmes liés à celui-ci, qu'essaye de répondre ce travail. Dans la compréhension actuelle de la physique, les neutrons et les protons sont des particules composées de particules élémentaires appelées quark up (symbole u) et quark down (symbole d). Le proton est un état lié uud et le neutron est un état lié udd. Les quarks up et down sont deux particules similaires: elles sont toutes deux légères (de l'ordre de quelques MeV) et leurs charges électriques sont différentes
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Whittamore, Zakary. „Isospin-violating dark matter and direct detection experiments“. Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=123143.

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Hints of direct detection of dark matter have been presented by the DAMA, CoGeNT, and CRESST collaborations, despite a number of null results that seem to contradict such claims. Although standard spin-independent dark matter is not capable of reconciling the results, dark matter models containing isospin-violating couplings have shown promise in solving the issues surrounding direct detection of dark matter. Inelastic or momentum-dependent scattering dark matter has also been shown to help alleviate these tensions. In light of the 2012 XENON100 observations, updated analysis of surface event contamination at CoGeNT, revision of the energy resolution employed by XENON10, and new results from the CDMS-II silicon detectors, we study the extent to which spin-independent, spin-dependent, and combined models of isospin-violating dark matter are capable of explaining current direct detection data. Moreover, we explore the effect of an energy-dependent sodium quenching factor $Q_{\rm Na}$ for fitting the DAMA observations, and give an isospin-violating prediction for XENON1T. In addition to the usual analysis involving phase space plots, we investigate a halo-independent model of dark matter in the space of minimum velocities required for a dark matter particle to scatter off a given nucleus. For the first time, such an analysis is performed for models of dark matter which embrace both inelastic and isospin-violating couplings, as well as for dark matter with momentum- and spin dependent interactions. With respect to the models considered herein, our results do not support a dark matter interpretation of direct detection data in either the standard or halo-independent formalisms.
Conseils de détection directe de la matière noire ont été présentés par les DAMA, CoGeNT, et CRESST collaborations, malgré un certain nombre de résultats nuls qui semblent contredire ces allégations. Bien que la norme matière noire indépendante du spin n'est pas capable de concilier la résultats, la matière noire modèles contenant couplages de isospin-violation ont montré des résultats prometteurs dans résolution des problèmes de détection directe de la matière noire. Diffusion inélastique ou dynamique dépendant de la matière noire a également été démontré que aider à atténuer ces tensions. À la lumière des observations XENON100 2012, analyse actualisée de la contamination de l' événement de surface à CoGeNT, la révision de la résolution de l'énergie utilisée par XENON10, et de nouveaux résultats provenant des détecteurs de silicium CDMS-II, nous étudier la mesure dans laquelle indépendante du spin, dépendant du spin, et des modèles combinés de la matière noire isospin-violation sont capables d'expliquer les données de détection directs actuels. De plus, nous explorons l'effet d'une trempe de sodium dépendant de l'énergie facteur $Q_{\rm Na}$ pour le montage des observations DAMA, et de donner une prévision de isospin-violation de XENON1T. En plus de l'analyse habituelle impliquant des parcelles de l'espace de phase, nous étudions un modèle de halo-indépendant de la matière noire dans l'espace des vitesses minimales requises pour une particule de matière noire se disperser hors d'un noyau donné. Pour la première fois, une telle analyse est effectuée pour les modèles de matière noire qui embrassent les deux couplages élastiques et isospin-violation, ainsi que de la matière noire avec des interactions dépendant du dynamique et spin. En ce qui concerne les modèles considérés ici, nos résultats ne soutiennent pas une question d'interprétation sombre de données de détection directe soit dans la norme ou formalismes halo-indépendant.
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8

Bell, Elizabeth. „N/Z equilibration“. Texas A&M University, 2003. http://hdl.handle.net/1969.1/2306.

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The N/Z, or ratio of neutron to proton, degree of freedom may be used to study intermediate energy nuclear collisions to give information about the origin of emitted collision fragments. Establishing under what conditions the onset of N/Z equilibrium occurs will give a better understanding of the physics of the equation of state through the use of simulation codes. If the nuclear equation of state can be elucidated in terms of the N/Z dependent component and how the N/Z dependent component varies with density, then the equilibrium ratio of protons to neutrons inside high density neutron stars can be inferred, allowing for prediction of cooling rates and supernovae mechanisms. In the current study, isotopic and isobaric ratios at thetalab=40o with cuts of 10% and 20% most central events, respectively, are studied for their N/Z equilibration signals. Light charged particles, or LCPs, are found to be emitted from systems which have not yet fully N/Z combined; the fragments with A=3 are emitted from the least equilibrated systems. Intermediate mass fragments, or IMFs, are seen to be emitted by N/Z equilibrated sources, within statistical error bars. The N/Z tracer method is used with ratios of isotopes and isobars to see how the amount of nuclear stopping or N/Z mixing changes as a function of the centrality of the event. The N/Z observable is used to reinvestigate earlier findings of the isotope and isobar ratio observables and shows the progression (or lack of it, in some cases) of the N/Z equilibration. This observable has proven to be a clear and sensitive tool to use when considering the differences in N/Z mixing of the systems at two energies.
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Titov, A. I., T. I. Gulamov und Burkhard Kämpfer. „Neutral roh-meson properties in an isospin-asymmetric pion medium“. Forschungszentrum Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-32202.

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Marini, Paola <1981&gt. „Isospin dependence of the Ar+Ni fusion-evaporation cross section“. Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amsdottorato.unibo.it/1532/.

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The fundamental goal of this thesis is the determination of the isospin dependence of the Ar+Ni fusion-evaporation cross section. Three Ar isotope beams, with energies of about 13AMeV, have been accelerated and impinged onto isotopically enriched Ni targets, in order to produce Pd nuclei, with mass number varying from 92 to 104. The measurements have been performed by the high performance 4pi detector INDRA, coupled with the magnetic spectrometer VAMOS. Even if the results are very preliminary, the obtained fusion-evaporation cross sections behaviour gives a hint at the possible isospin dependence of the fusion-evaporation cross sections.
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Bücher zum Thema "IsoSPI"

1

Wissink, Scott W. Spin and Isospin in Nuclear Interactions. Boston, MA: Springer US, 1991.

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Wissink, Scott W., Charles D. Goodman und George E. Walker, Hrsg. Spin and Isospin in Nuclear Interactions. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3834-9.

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ill, Furiya Nana 1961, Hrsg. Isoppu no ohanashi. Tōkyō: Guranmamasha, 2009.

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Workshop on Nuclei at Extremes of Isospin and Mass (2003 Institute of Physics, Bhubaneswar). Nuclei at extremes of Isospin and mass. Herausgegeben von Ansari A und Choudhury R. K. New Delhi: Narosa Pub. House, 2005.

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A, Ansari, Choudhury R. K und Institute of Physics (Bhubaneswar, India), Hrsg. Nuclei at extremes of Isospin and mass. New Delhi: Narosa Pub. House, 2005.

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P, Van Isacker, Fujimori Atsushi 1953-, Höhler G. (Gerhard), Jolie J. (Jan), Kühn, J. H. (Johann H.), 1946-, Müller Thomas, Steiner Frank et al., Hrsg. Symmetries in Atomic Nuclei: From Isospin to Supersymmetry. New York, NY: Springer New York, 2009.

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Atōda, Takashi. Isoppu o shitte imasu ka. Tōkyō: Shinchōsha, 2010.

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Isoppu. Isoppu monogatari: Jūsan no ohanashi. Kōbe: BL Shuppan, 2012.

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1758-1833, Isopi Antonio, Hrsg. Antonio Isopi (1758-1833): Ein römischer Bildhauer am württembergischen Hof. Frankfurt am Main: P. Lang, 1996.

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Kim, Su-mi. Isop iyagi. Sŏul Tʻŭkpyŏlsi: Yerimdang, 1994.

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Buchteile zum Thema "IsoSPI"

1

Hecht, K. T. „Isospin“. In Quantum Mechanics, 529–37. New York, NY: Springer New York, 2000. http://dx.doi.org/10.1007/978-1-4612-1272-0_56.

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Amsler, Claude. „Isospin“. In The Quark Structure of Hadrons, 29–40. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-98527-5_3.

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Di Toro, M., S. J. Yennello und B. A. Li. „Isospin flows“. In Dynamics and Thermodynamics with Nuclear Degrees of Freedom, 153–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/978-3-540-46496-9_13.

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Ho-Kim, Quang, und Xuan-Yem Pham. „Hadrons and Isospin“. In Elementary Particles and Their Interactions, 185–214. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-662-03712-6_6.

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Toki, H. „Spin-Isospin Response in Nuclei“. In Weak and Electromagnetic Interactions in Nuclei, 423–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-71689-8_86.

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Greiner, Walter, und Berndt Müller. „The Isospin Group (Isobaric Spin)“. In Quantum Mechanics, 95–123. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-662-00902-4_5.

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Fritzsch, Harald. „Isospin and SU(3)-Symmetry“. In Murray Gell-Mann and the Physics of Quarks, 5–10. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-92195-2_2.

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Greiner, Walter, und Berndt Müller. „The Isospin Group (Isobaric Spin)“. In Quantum Mechanics, 141–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-57976-9_5.

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Bojowald, J., A. Budzanowski, A. Chatterjee, J. Ernst, L. Freindl, D. Frekers, P. Hawranek et al. „Isospin Symmetry Breaking: Experimental Observation“. In Nuclear Dynamics: From Quarks to Nuclei, 61–66. Vienna: Springer Vienna, 2003. http://dx.doi.org/10.1007/978-3-7091-6014-5_6.

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Londergan, J. T., und S. Kumano. „Deep Inelastic Scattering of Leptons and Tests of Quark/Parton Models“. In Spin and Isospin in Nuclear Interactions, 1–32. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3834-9_1.

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Konferenzberichte zum Thema "IsoSPI"

1

Zegers, R. G. T., A. M. van den Berg, S. Brandenburg, F. R. R. Fleurot, V. M. Hannen, M. N. Harakeh, K. van der Schaaf et al. „ISOSPIN AND SPIN-ISOSPIN MODES IN NUCLEI“. In The Proceedings of the International Symposium on Nuclear Electro-Weak Spectroscopy for Symmetries in Electro-Weak Nuclear-Processes. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812776754_0034.

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SON, D. T., und M. A. STEPHANOV. „ISOSPIN MATTER“. In Proceedings of the SEWM2000 Meeting. WORLD SCIENTIFIC, 2001. http://dx.doi.org/10.1142/9789812799913_0010.

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Harakeh, M. N., H. Akimune, A. M. van den Berg, S. Brandenburg, M. Fujiwara, H. Laurent, A. Willis und R. G. T. Zegers. „Isospin and spin-isospin modes in charge-exchange reactions“. In Experimental nuclear physics in europe: Facing the next millennium. AIP, 1999. http://dx.doi.org/10.1063/1.1301794.

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DI TORO, M., V. BARAN, M. COLONNA und V. GRECO. „ISOSPIN IN REACTIONS“. In Proceedings of the International Symposium. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812705204_0003.

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Rusetsky, Akaki. „Isospin symmetry breaking“. In 6th International Workshop on Chiral Dynamics. Trieste, Italy: Sissa Medialab, 2010. http://dx.doi.org/10.22323/1.086.0071.

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HARAKEH, M. N. „EXCITATION OF ISOSPIN AND SPIN-ISOSPIN MODES IN THE β+ DIRECTION“. In Proceedings of the International Symposium. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812703972_0005.

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Qi, Hongrong, und Wencheng Yan. „Isospin violations at BESIII“. In XIII Quark Confinement and the Hadron Spectrum. Trieste, Italy: Sissa Medialab, 2019. http://dx.doi.org/10.22323/1.336.0125.

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BARAN, V., M. COLONNA, M. DI TORO und V. GRECO. „ISOSPIN IN FRAGMENT PRODUCTION“. In Proceedings of the 9th Conference on Problems in Theoretical Nuclear Physics. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812705143_0025.

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Nishijima, K. „From isospin to strangeness“. In Discovery of weak neutral currents: the weak interaction before and after. AIP, 1994. http://dx.doi.org/10.1063/1.45422.

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Hicks, K. H. „Spin‐isospin nuclear response“. In 3rd Conference on the Intersections Between Particle and Nuclear Physics. American Institute of Physics, 1988. http://dx.doi.org/10.1063/1.37776.

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Berichte der Organisationen zum Thema "IsoSPI"

1

Cohen, T. D., und W. Broniowski. Pseudo-Goldstone modes in isospin-asymmetric nuclear matter. Office of Scientific and Technical Information (OSTI), Januar 1995. http://dx.doi.org/10.2172/10108388.

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Grossman, yuval. Trojan Penguins and Isospin Violation in Hadronic B Decays. Office of Scientific and Technical Information (OSTI), September 1999. http://dx.doi.org/10.2172/12482.

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Oh, P. Symplectic structure of isospin particles in Yang-Mills fields. Office of Scientific and Technical Information (OSTI), Januar 1992. http://dx.doi.org/10.2172/5083047.

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Oh, P. Symplectic structure of isospin particles in Yang-Mills fields. Office of Scientific and Technical Information (OSTI), Januar 1992. http://dx.doi.org/10.2172/10159194.

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Kicinska-Habior, M., K. A. Snover, J. A. Behr, C. A. Gossett, J. H. Gundlach, Z. M. Drebi, M. S. Kaplan und D. P. Wells. Shape changes and isospin purity in highly excited light mass nuclei. Office of Scientific and Technical Information (OSTI), November 1993. http://dx.doi.org/10.2172/10103810.

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Applegate, Joffa Michele. A study of isospin symmetry breaking in carbon 12 with 50 MeV pions. Office of Scientific and Technical Information (OSTI), März 1993. http://dx.doi.org/10.2172/10141636.

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Baker, F. T. Studies of the spin-isospin response of nuclear continuum using intermediate-energy hadrons. Office of Scientific and Technical Information (OSTI), Januar 1992. http://dx.doi.org/10.2172/7235191.

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O'Connell, Heath B. Isospin Symmetry Breaking within the HLS Model: A Full (rho, omega, phi) Mixing Scheme. Office of Scientific and Technical Information (OSTI), Juli 2001. http://dx.doi.org/10.2172/784974.

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Aubert, B. Measurement of Branching Fractions, and CP and Isospin Asymmetries, for B --> K* gamma. Office of Scientific and Technical Information (OSTI), Juli 2004. http://dx.doi.org/10.2172/827298.

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Baker, F. T. Studies of the spin-isospin response of the nuclear continuum using intermediate energy hadrons. Office of Scientific and Technical Information (OSTI), Dezember 1990. http://dx.doi.org/10.2172/6227222.

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