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Littérature scientifique sur le sujet « Light neutron-rich nuclei »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 10 mars 2023

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Articles de revues sur le sujet "Light neutron-rich nuclei"

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Bang, J. M., F. A. Gareev, G. S. Kazacha, and A. M. Kalinin. "Neutron-rich light nuclei." Physica Scripta 41, no. 2 (1990): 202–6. http://dx.doi.org/10.1088/0031-8949/41/2/003.

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Jelavić Malenica, D., M. Milin, A. Di Pietro, et al. "Clusters in neutron-rich light nuclei." EPJ Web of Conferences 117 (2016): 07007. http://dx.doi.org/10.1051/epjconf/201611707007.

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HAGINO, K., H. SAGAWA, and P. SCHUCK. "DI-NEUTRON CORRELATION IN LIGHT NEUTRON-RICH NUCLEI." International Journal of Modern Physics E 18, no. 10 (2009): 2045–49. http://dx.doi.org/10.1142/s0218301309014263.

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Using a three-body model with density-dependent contact interaction, we discuss the root mean square distance between the two valence neutrons in 11 Li nuclues as a function of the center of mass of the neutrons relative to the core nucleus 9 Li . We show that the mean distance takes a pronounced minimum around the surface of the nucleus, indicating a strong surface di-neutron correlation. We demonstrate that the pairing correlation plays an essential role in this behavior. We also discuss the di-neutron structure in the 8 He nucleus.

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Torilov, S. Yu, K. A. Gridnev, and T. V. Korovitskaya. "Rotational bands in light neutron-rich nuclei." Bulletin of the Russian Academy of Sciences: Physics 76, no. 8 (2012): 854–56. http://dx.doi.org/10.3103/s1062873812080278.

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Sagawa, Hiroyuki, and C. A. Bertulani. "Multipole Excitations in Light Neutron-Rich Nuclei." Progress of Theoretical Physics Supplement 124 (1996): 143–53. http://dx.doi.org/10.1143/ptps.124.143.

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He, Chao, Hui Hua, Xiangqing Li та Bo Wang. "β-Decay of Light Neutron-Rich Nuclei". Plasma Science and Technology 14, № 7 (2012): 610–13. http://dx.doi.org/10.1088/1009-0630/14/7/10.

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Kanada-En'yo, Y., Y. Taniguchi, and M. Kimura. "Cluster structure in light neutron-rich nuclei." Journal of Physics: Conference Series 111 (May 1, 2008): 012002. http://dx.doi.org/10.1088/1742-6596/111/1/012002.

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Bohlen, H. G., W. von Oertzen, R. Kalpakchieva, et al. "Band structures in light neutron-rich nuclei." Journal of Physics: Conference Series 111 (May 1, 2008): 012021. http://dx.doi.org/10.1088/1742-6596/111/1/012021.

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Hoshino, T., H. Sagawa, and A. Arima. "Giant resonances of light neutron-rich nuclei." Nuclear Physics A 523, no. 2 (1991): 228–46. http://dx.doi.org/10.1016/0375-9474(91)90002-n.

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Korsheninnikov, A. A., D. V. Aleksandrov, N. Aoi, et al. "Experimental studies of light neutron rich nuclei." Nuclear Physics A 588, no. 1 (1995): c23—c28. http://dx.doi.org/10.1016/0375-9474(95)00094-h.

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Thèses sur le sujet "Light neutron-rich nuclei"

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Woods, P. J. "Mass measurements of light neutron rich nuclei." Thesis, University of Manchester, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374579.

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Kobayashi, Fumiharu. "Systematic investigation of dineutron correlation in light neutron-rich nuclei." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188479.

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ZILIANI, SARA. "COMPREHENSIVE INVESTIGATION OF LIGHT NEUTRON-RICH NUCLEI TO TEST MODERN NUCLEAR THEORETICAL MODELS." Doctoral thesis, Università degli Studi di Milano, 2021. http://hdl.handle.net/2434/885740.

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Light nuclei, in particular the ones on the neutron-rich side of the valley of stability, represent a fertile ground to look for new experimental evidence, which can be exploited to benchmark theoretical approaches. In this Thesis we provide an experimental investigation of neutron-rich nuclei from boron to oxygen, employing state-of-the-art experimental techniques and detection systems. Novel information is collected and compared with the most advanced theoretical predictions currently available. The research activity described in this work has been developed on three levels, each associated to a different research line, that mirror the characteristic structure of a nucleus: bound states below the particle emission thresholds, near-threshold states and unbound resonances. In fact, the first line of research aims at the investigation of bound states in neutron-rich C, N and O isotopes, the second focuses on near-threshold resonances (11B as a specific case), and the third on stretched unbound states in the continuum of 13C, 14N and 16O. Altogether, a rather comprehensive body of experimental information will be discussed and confronted with some of the most advanced theoretical interpretations currently available for describing light atomic nuclei, such as ab initio approaches and Shell Model including the coupling to the continuum.

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Barr, Matthew. "Alpha clustering in the ground state of neutron rich light nuclei." Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/4884/.

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An experiment was conducted at the GSI Helmholtz Centre for Heavy Ion Research in Darmstadt, Germany, using the R³B experimental setup. This included an array of double sided silicon strip detectors and a 4π array of NaI scintillator detectors surrounding the target, a bending magnet and downstream fragment detectors consisting of scintillating fibre detectors and a plastic scintillator time of flight wall. Cross sections have been measured for the breakup of ^{7,9-12}Be and ^{8,10-15}B on proton and \(^↔\)C targets at beam energies between 260 and 540 MeV per nucleon. These cross sections have been analysed with a focus on comparison to cluster model theory. In the context of a large collaboration and an experiment with diverse physics objectives, it is worth clarifying the author's contribution to the work presented. The author participated in running the experiment, calibrated the Silicon Strip Detectors and performed all the analysis discussed in this thesis.

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Mathy, Michael Bernhard [Verfasser], Marina [Akademischer Betreuer] Petri, and Robert [Akademischer Betreuer] Roth. "Electromagnetic Properties of Light Neutron-Rich Nuclei - Lifetime Measurements of 16C and 23Ne / Michael Bernhard Mathy ; Marina Petri, Robert Roth." Darmstadt : Universitäts- und Landesbibliothek, 2021. http://d-nb.info/1232407526/34.

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Heine, Marcel [Verfasser], Thomas [Akademischer Betreuer] Aumann та Norbert [Akademischer Betreuer] Pietralla. "Measurement of (n,γ)-Rates of Light Neutron-Rich Nuclei for the r-Process Nucleosynthesis / Marcel Heine. Betreuer: Thomas Aumann ; Norbert Pietralla". Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2015. http://d-nb.info/1110980671/34.

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Mathy, Michael Bernhard. "Electromagnetic Properties of Light Neutron-Rich Nuclei - Lifetime Measurements of 16C and 23Ne." Phd thesis, 2021. https://tuprints.ulb.tu-darmstadt.de/17490/1/PHD_MMathy_2021_Final.pdf.

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The lifetimes of higher-lying excited states were measured for 16C and 23Ne using a target and degrader setup made of beryllium and gold to apply the Doppler-shift attenuation method. The experiment was performed at the Argonne National Laboratory exploiting the reaction 9Be(9Be,2p)16C* as well as 9Be(16O,2p)23Ne*, which was available due to oxidation of the target. The emitted gamma rays were measured with Gammasphere while the charged particles were detected with Microball. By comparing the measured gamma-ray spectra for different detection angles and 2p events with Geant4 simulations, lifetimes can be obtained. An elaborated explanation of the used analysis method and potential uncertainties is given in this work. The simulations were carried out for two different sets of stopping powers to check their influence on the results. For 23Ne the lifetimes of two higher-lying states could be measured for the first time. The lifetime of the (5/2+,7/2+) state at 2517 keV was obtained to 641(79)fs +16fs-6fs(syst,target), while the lifetime of the (5/2+, 7/2+) state at 1702 keV was obtained to 168(55)fs +8fs-1fs(syst,target) +72fs-80fs(syst,feeding). To consider the feeding for the lower state it was assumed that the angular distributions are the same for both observed transitions. Theoretical USDB calculations were able to reproduce the level energies well, while they significantly underestimate the experimental lifetimes. For 16C the lifetime of the 4_1+ state could be constrained between 1.9ps +0.0ps-0.1ps(syst,target) and 4ps. This results in 2.74e^2fm^4 ≤ B(E2;4_1+→2_1+ ) ≤ 5.78e^2fm^4 +0.32e^2fm^4 -0.00e^2fm^4(syst,target) as a transition strength limit for the 4_1+ state. Theoretical predictions from no-core shell model calculations with NN+NNN interactions and p-sd shell model calculations for several effective two body interactions fulfill this constraint. The most likely lifetime range for the 2_2+ state was obtained to be 244 fs to 376 fs. Together with branching ratio limits for this state, which are known from previous measurements, the transition strengths for the 2_2+ state could be constrained. No-core shell model, recent in-medium no-core shell model, and p-sd shell model calculations are compared to these results. In the second part of this work a conceptual design of a 14C electron scattering experiment at the QCLAM Spectrometer at the S-DALINAC is presented.

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Heine, Marcel. "Measurement of (n,γ)-Rates of Light Neutron-Rich Nuclei for the r-Process Nucleosynthesis". Phd thesis, 2015. http://tuprints.ulb.tu-darmstadt.de/4343/1/main.pdf.

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Exclusive neutron capture cross sections of 17C and associated stellar reaction rates have been derived from Coulomb dissociation of 18C using the R3B-LAND setup at GSI in Darmstadt (Germany). The secondary beam of relativistic 18C at approximately 430 AMeV was generated by fragmentation of primary 40Ar on a beryllium target. In the FRagment Separator (FRS) the nuclei of interest were selected and subsequently guided to the experimental setup at Cave C. There the ions were excited electromagnetically in the electric field of lead target nuclei and the de-excitation process was detected with the R3B-LAND setup. All reaction products of the one-neutron evaporation channel including gammas from de-exciting states of fragments were measured and the invariant mass was reconstructed. A similar measurement of 17C Coulomb dissociation served as a benchmark to validate the accuracy of the present results with respect to previously published data. The measured relative energy spectra of 18C Coulomb dissociation to the ground state of 17C as well as the first and second excited state in 17C qualitatively match theoretical calculations of the Coulomb- dissociation process in an independent-particle model. In particular, the shapes of experimental data are reproduced. The measured spectroscopic factors were compared to an exclusive one-neutron knockout measurement on 18C, which is consistent within the respective uncertainties. The energy differential cross sections were converted into photo-absorption cross sections 18C(γ,n)17C with virtual-photon theory. Subsequently, exclusive neutron-capture cross sections 17C(n,γ)18C to the ground state were derived using the detailed-balance theorem. The neutron-capture cross sections were used to calculate stellar reaction rates, where the neutron velocities follow a Maxwell-Boltzmann distribution. The results were compared to thermonuclear reaction rates from a statistical Hauser-Feshbach model (HF). The uncertainty of the experimental results is at maximum around 60% at T9 = 1 GK for neutron capture in the ground state of 17C. This is accompanied by an uncertainty of a factor of ten in the HF calculation.

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Livres sur le sujet "Light neutron-rich nuclei"

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Pillai, Chandrasekhara. Direct mass measurements of light neutron-rich nuclei using a combined energy and time-of-flight technique. 1985.

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Chapitres de livres sur le sujet "Light neutron-rich nuclei"

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Ogloblin, Alexei A., and Yuri E. Penionzhkevich. "Very Neutron-Rich Very Light Nuclei." In Treatise on Heavy Ion Science. Springer US, 1989. http://dx.doi.org/10.1007/978-1-4613-0713-6_4.

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Itagaki, N., K. Ikeda, S. Okabe, and T. Otsuka. "Cluster structure in light neutron-rich nuclei." In Exotic Nuclei and Atomic Masses. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55560-2_90.

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Orr, N. A. "Haloes and clustering in light, neutron-rich nuclei." In Exotic Nuclei and Atomic Masses. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55560-2_69.

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Mrázek, J., D. Baiborodin, Z. Dlouhý, and G. Thiamová. "Footprints of shell effects in light-neutron rich nuclei." In Exotic Nuclei and Atomic Masses. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55560-2_13.

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Dufour, J. P., R. Del Moral, A. Fleury, et al. "Beta Decay of Twelve Light Neutron-Rich Isotopes from 17C to 40S." In Weak and Electromagnetic Interactions in Nuclei. Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-71689-8_47.

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"STRUCTURE OF LIGHT NEUTRON-RICH NUCLEI." In Light Exotic Nuclei Near the Boundary of Neutron Stability. WORLD SCIENTIFIC, 2021. http://dx.doi.org/10.1142/9789811242984_0005.

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"SYNTHESIS OF NEUTRON-RICH ISOTOPES OF LIGHT ELEMENTS." In Light Exotic Nuclei Near the Boundary of Neutron Stability. WORLD SCIENTIFIC, 2021. http://dx.doi.org/10.1142/9789811242984_0002.

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"METHODS FOR STUDYING THE STRUCTURE OF NEUTRON-RICH NUCLEI." In Light Exotic Nuclei Near the Boundary of Neutron Stability. WORLD SCIENTIFIC, 2021. http://dx.doi.org/10.1142/9789811242984_0004.

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Actes de conférences sur le sujet "Light neutron-rich nuclei"

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GLASMACHER, T. "LIGHT NEUTRON-RICH EXOTIC NUCLEI." In Proceedings of the International Symposium. WORLD SCIENTIFIC, 2001. http://dx.doi.org/10.1142/9789812811233_0037.

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UENO, H., A. YOSHIMI, H. WATANABE, et al. "NUCLEAR-MOMENT MEASUREMENTS OF LIGHT NEUTRON-RICH NUCLEI." In Proceedings of the International Symposium. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812701749_0013.

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Golovkov, M. S., Yu E. Penionzhkevich, and S. M. Lukyanov. "Correlation Study Of Light Neutron Rich Nuclei." In INTERNATIONAL SYMPOSIUM ON EXOTIC NUCLEI. AIP, 2010. http://dx.doi.org/10.1063/1.3431417.

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Itagaki, N., P. W. Zhao, J. Meng, H. Matsuno, and T. Suhara. "Exotic structure in light neutron-rich nuclei." In Nuclear Structure and Dynamics ’15. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4932241.

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Datta Pramanik, U., T. Aumann, D. Cortina, et al. "Structure studies of light neutron-rich nuclei." In Proceedings of the International Symposium. WORLD SCIENTIFIC, 2001. http://dx.doi.org/10.1142/9789812811233_0028.

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Glasmacher, T., H. Scheit, B. A. Brown, et al. "Coulomb excitation of neutron rich light nuclei." In The fourteenth international conference on the application of accelerators in research and industry. AIP, 1997. http://dx.doi.org/10.1063/1.52708.

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Rodríguez-Guzmán, R. R. "Quadrupole Collectivity Of Neutron-Rich Light Nuclei." In FRONTIERS OF NUCLEAR STRUCTURE. AIP, 2003. http://dx.doi.org/10.1063/1.1556657.

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Kartavenko, V. G., T. Burvenich, K. A. Gridnev, et al. "On stability of the neutron rich light nuclei." In INTERNATIONAL SYMPOSIUM ON EXOTIC NUCLEI. AIP, 2007. http://dx.doi.org/10.1063/1.2746592.

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ITAGAKI, N., S. HIROSE, T. OTSUKA, S. OKABE, and K. IKEDA. "EXOTIC CLUSTER STRUCTURE IN LIGHT NEUTRON-RICH NUCLEI." In Proceedings of the Third International Conference. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812705211_0022.

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Itagaki, N., T. Otsuka, S. Okabe, and K. Ikeda. "Exotic cluster structure in light neutron-rich nuclei." In Proceedings of the 4th Italy-Japan Symposium. WORLD SCIENTIFIC, 2003. http://dx.doi.org/10.1142/9789812791320_0008.

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