Dissertations / Theses on the topic 'Fine structure constant'
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Evans, Jason L. "On the variability of the fine structure constant /." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd496.pdf.
Full textEvans, Jason Lott. "On the Variability of the Fine Structure Constant." BYU ScholarsArchive, 2004. https://scholarsarchive.byu.edu/etd/144.
Full textSmiciklas, Marc. "A Determination of the Fine Structure Constant Using Precision Measurements of Helium Fine Structure." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc31547/.
Full textMota, David Fonseca. "Variations of the fine structure constant in space and time." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.615756.
Full textMurphy, Michael T. Physics Faculty of Science UNSW. "Probing variations in the fundamental constants with quasar absorption lines." Awarded by:University of New South Wales. School of Physics, 2002. http://handle.unsw.edu.au/1959.4/19062.
Full textNg, Sui-chung. "Variation of the fine structure constant in 5D Kaluza-klein theory." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B31993175.
Full textNg, Sui-chung, and 吳瑞聰. "Variation of the fine structure constant in 5D Kaluza-klein theory." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B31993175.
Full textTajmar, Martin. "Derivation of the Planck and Fine-Structure Constant from Assis’s Gravity Model." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-173411.
Full textBainbridge, Matthew, Martin Barstow, Nicole Reindl, W. Ü. Tchang-Brillet, Thomas Ayres, John Webb, John Barrow, et al. "Probing the Gravitational Dependence of the Fine-Structure Constant from Observations of White Dwarf Stars." MDPI AG, 2017. http://hdl.handle.net/10150/625061.
Full textDavis, Adam N. "Astrophysical Constraints on Fundamental Parameters in Physics and Astronomy." Case Western Reserve University School of Graduate Studies / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=case1098973318.
Full textMorel, Léo. "High sensitivity matter-wave interferometry : towards a determination of the fine structure constant below 10-10." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS264.
Full textThe fine structure constant can be determined from the measurement of the ratio h/m between the Planck constant, h, and the mass of an atom, m. The comparison of the experimental value of the anomalous magnetic moment of the electron or the muon with their theoretical values predicted by the Standard Model using this value of the fine structure constant allows a very precise test of this model. My thesis work focused principally on the measurement of the h/m ratio of rubidium-87 using a new experimental device. This device has been designed to produce an ultra-cold source by evaporation in an all-optical dipole trap loaded from optical molasses. We optimized the parameters of the experimental device using a genetic algorithm, which allowed us to produce a Bose Einstein condensate, containing 120,000 atoms, polarized in the state F=1, mF=0, with a cycle time of 3.5 seconds. We then installed the laser device for atom interferometry, to interrogate a cloud of cold atoms produced by optical molasses. Combining an interferometer using Raman transitions and the Bloch oscillation technique, we demonstrated an unprecedented sensitivity on the measurement of h/m corresponding to a relative statistical uncertainty of 8.5 x 10-11 in 48 hours of integration, or 4.3 x 10-11 on the fine structure constant. This sensitivity has allowed us to experimentally study a variety of systematic effects. We simultaneously carried out modelling work that contributed to the implementation of protocols to compensate for the biases induced by systematic effects. We present a preliminary assessment of the error budget associated with these effects
Bradley, Michael Patrick 1971. "A sub-ppb measurement of the mass of cesium for a new determination of the fine-structure constant." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/28222.
Full textIncludes bibliographical references (p. 186-194).
This thesis describes recent single-ion Penning trap mass spectrometry measurements of the mass of atomic Cesium with a relative uncertainty of 2 x 10-10. This measurement reduces the uncertainty on the mass of Cesium by a factor of 100, and removes this uncertainty as a limitation on the accuracy of a determination of the fine-structure constant alpha via a Cesium photon recoil experiment. Removal of this limit should ultimately allow this value of alpha to have a relative accuracy ~1 ppb, which would be comparable to or even better than the most accurate measurement of alpha currently available. This value of alpha will help shed light on the current ~50 ppb discrepancies between values of alpha measured via different routes. In addition to the mass measurement of Cesium, this thesis also describes related mass measurements of atomic Rubidium and Sodium which reduce the uncertainties on these masses by factors - 100, with a view to possible future photon recoil measurements using these species. The measurements were taken using a new Penning trap mass spectrometer constructed by the author and his colleagues. This new spectrometer followed the general design principles of previous MIT ICR Lab Penning trap mass spectrometers, and incorporated a DC SQUID as an ion detector for the first time. This thesis concludes with a discussion of a passive two-coil system designed for shielding magnetic field gradients. These may prove to be the key enabling technology for a future double Penning trap mass spectrometer.
by Michael Patrick Bradley.
Ph.D.
Dominguez, Didier. "Application de l'effet hall quantique en metrologie : conservation de l'ohm et determination de la constante de structure fine." Paris, CNAM, 1987. http://www.theses.fr/1987CNAM0084.
Full textMirandés, Rivera Estefania de. "Bloch oscillations of ultracold atoms." Paris 6, 2006. http://www.theses.fr/2006PA066622.
Full textHoogerheide, Shannon Michelle Fogwell. "Trapped positrons for high-precision magnetic moment measurements." Thesis, Harvard University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3566927.
Full textA single electron in a quantum cyclotron provides the most precise measurement of the electron magnetic moment, given in units of the Bohr magneton by g/2 = 1.001 159 652 180 73 (28) [0.28 ppt]. The most precise determination of the fine structure constant comes from combining this measurement with Standard Model theory, yielding α-1 = 137.035 999 173 (34) [0.25 ppb], limited by the experimental uncertainty of the electron g-value. The most stringent test of CPT symmetry in leptons comes from comparing the electron and positron magnetic moments, limited by the positron uncertainty at 4.2 ppt. A new high-stability apparatus has been built and commissioned for improved measurements of the electron and positron magnetic moments, a greatly improved test of lepton CPT symmetry, and an improved determination of the fine structure constant. These new measurements require robust positron loading from a retractable radioactive source that is small enough to avoid compromising the high-precision environment of our experiment. The design and implementation of such a scheme is a central focus of this work. Robust positron loading at a rate of 1-2 e+/min from a 6.5 μCi 22Na source has been demonstrated.
Reichelt, Uwe J. M. "The physical meaning of the fine structure constants." Uwe J. M. Reichelt, 2021. https://slub.qucosa.de/id/qucosa%3A75202.
Full textNez, François. "De la constante de Rydberg à la métrologie des constantes fondamentales." Habilitation à diriger des recherches, Université Pierre et Marie Curie - Paris VI, 2005. http://tel.archives-ouvertes.fr/tel-00204773.
Full textLa mesure du recul induit par un photon sur un atome de masse M conduit à une détermination pertinente de la constante de structure fine $\alpha$ en utilisant la constante de Rydberg, et les rapports des masses de l'électron, du proton, de l'atome considéré. Dans cet optique, nous avons développé une nouvelle expérience d'oscillations de Bloch avec des atomes de rubidium ultra-froids. Le principe de l'expérience est exposé brièvement tout en insistant sur l'originalité de notre approche. Les premiers résultats métrologiques obtenus très récemment sont présentés.
Cladé, Pierre. "Oscillations de Bloch d'atomes ultrafroids et mesure de la constante de structure fine." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2005. http://tel.archives-ouvertes.fr/tel-00010730.
Full textBattesti, Rémy. "Accélération d'atomes ultrafroids : mesure de h/M." Paris 6, 2003. https://tel.archives-ouvertes.fr/tel-00003972.
Full textMbelek, Jean-Paul. "Les champs scalaires et leurs applications en astrophysique et cosmologie." Paris 6, 2003. http://www.theses.fr/2003PA066214.
Full textMarion, Harold. "Contrôle des collisions froides du césium 133 : tests de la variation de la constante de structure fine à l'aide d'une fontaine atomique double rubidium-césium." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2005. http://tel.archives-ouvertes.fr/tel-00008921.
Full textDominguez, Didier. "Application de l'effet Hall quantique en métrologie conservation de l'ohm et détermination de la constante de structure fine /." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376046031.
Full textBize, Sébastien. "Tests fondamentaux à l'aide d'horloges à atomes froids de rubidium et de césium." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2001. http://tel.archives-ouvertes.fr/tel-00000981.
Full textCourvoisier, Clément. "Condensat de Bose-Einstein par refroidissement évaporatif dans un piège dipolaire pour la métrologie par interférométrie atomique." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066251/document.
Full textThis research work fulfilled as part of my PhD project involved to design, build and characterise a new experimental setup based on an atom source by evaporative cooling in an optical dipole trap. It goes after the improvement of the uncertainty on the measurement of the ratio h/m between Planck’s constant and the rubidium atom mass, reducing the Gouy phase and wavefront curvature.In a first step we have studied several optical configurations to optimise the dipole trap loading: the 50 W beam at 1070 nm is shaped in a double 93 µm waist reservoir and one crossed 20 µm waist dimple. After having optimised and caracterised the evaporative process, we obtained one Bose-Einstein condensate.Furthermore, for Raman interferometry, we set up a new laser system at 1560 nm based on frequency doubling. We developed a double cervo loop: on the one hand, it allows to phase lock the two laser sources, and on the other hand to correct phase noise accumulated in fibered amplifiers.Today, our new experimental setup is ready to perform atom interferometry on a Bose-Einstein condensate
Zicler, Eléonore. "Chimie quantique et cosmologie : de la recherche de l'hélium moléculaire à la variation de la constante de structure fine." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066558/document.
Full textDespite Helium is the second most abundant element in the Universe (He/H ~ 1/10), it has never been observed in any other forms than that of an atom or an ion in the InterStellar Medium (ISM). Since He is a noble gas, its non-observation as part of neutral molecular systems is understandable, but it is quite surprising for positively charged species like HeH+, [HeH3]+ or CHe2+. The first part of this study aims at finding a chemical reason for such a non-observation and in particular for the three ions mentioned above. For that purpose, we have computed high level quality (CASPT2) energy hyper-surfaces and performed radiative association calculations. Finally, we are able to suggest a region of the ISM where the detection of HeH+ might be achieved.The second part of this work deals with the possibility that the fundamental constants could be time-dependent. In 1999, Webb et al., analyzing the quasar emissions, claimed that the fine structure constant α could have been smaller in the past, but this result has not been confirmed. Thus it seemed necessary to determine theoretically how much such a variation could affect the electronic spectra of some primordial molecules in order to determine whether such variations might be detectable or not with the current observational instrumentation. For that purpose, we have developed an ab initio protocol to evaluate the shift induced by a variation of α. High level quantum chemistry calculations (MRCI) show that a variation of α of the same order of magnitude than that reported by Webb et al., would induce shifts that are not detectable by the current telescopes
Pientka, Grit. "Hadronic corrections to electroweak observables from twisted mass lattice QCD." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2015. http://dx.doi.org/10.18452/17312.
Full textFor several benchmark quantities investigated to detect signs for new physics beyond the standard model of elementary particle physics, lattice QCD currently constitutes the only ab initio approach available at small momentum transfers for the computation of non-perturbative hadronic contributions. Among those observables are the lepton anomalous magnetic moments and the running of the electroweak coupling constants. We compute the leading QCD contribution to the muon anomalous magnetic moment by performing lattice QCD calculations on ensembles incorporating Nf=2+1+1 dynamical twisted mass fermions. Considering active up, down, strange, and charm quarks, admits for the first time a direct comparison of the lattice data for the muon anomaly with phenomenological results because both the latter as well as the experimentally obtained values are sensitive to the complete first two generations of quarks at the current level of precision. Recently, it has been noted that improved measurements of the electron and tau anomalous magnetic moments might also provide ways of detecting new physics contributions. Therefore, we also compute their leading QCD contributions, which simultaneously serve as cross-checks of the value obtained for the muon. Additionally, we utilise the obtained data to compute the leading hadronic contribution to the running of the fine structure constant, which enters all perturbative QED calculations. Furthermore, we show that even for the weak mixing angle the leading QCD contribution can be computed from this data. In this way, we identify a new prime observable in the search for new physics whose hadronic contributions can be obtained from lattice QCD. With the results obtained in this thesis, we are able to exclude unsuitable phenomenologically necessary flavour separations and thus directly assist the presently more precise phenomenological determinations of this eminent quantity.
Schwob, Catherine. "Spectroscopie atomique et mesures de grande précision : détermination de constantes fondamentales." Habilitation à diriger des recherches, Université Pierre et Marie Curie - Paris VI, 2006. http://tel.archives-ouvertes.fr/tel-00128345.
Full textatomique de grande précision dans le cadre de la détermination de
constantes fondamentales.
Dans un chapitre consacré à la détermination de la constante de
Rydberg et du déplacement de Lamb du niveau 1S de l'atome d'hydrogène, je
fais le point sur les mesures de fréquences optiques de grande précision
réalisées sur cet atome.
D'autre part, je présente l'expérience qui a débuté dans notre équipe en 1999,
dont l' objectif est la détermination de la constante de structure fine
avec une incertitude relative d'environ 10-9. Le principe de cette
expérience consiste à exploiter la grande efficacité des oscillations de
Bloch des atomes froids dans un potentiel lumineux pour mesurer
précisément le rapport h/m entre la constante de Planck et la masse de l'atome.
Actuellement, nous atteignons une incertitude relative de 6,7x10-9 sur alpha.
Il s'agit de la détermination la plus précise à ce jour, après celle
déduite de la mesure de l'anomalie du rapport gyromagnétique de
l'électron. Je mentionne également les évolutions à court et moyen termes de
cette expérience et je conclue sur l'impact de ce travail dans le
contexte d'une éventuelle redéfinition du kilogramme.
Sortais, Yvan. "Construction d'une fontaine double a atomes froids de 87Rb et 133Cs : étude des effets dépendant du nombre d'atomes dans une fontaine." Paris 6, 2001. https://tel.archives-ouvertes.fr/tel-00001065.
Full textBouchendira, Rym. "Mesure de l'effet de recul de l'atome de rubidium par interférométrie atomique : nouvelle détermination de la constante de structure fine pour tester l'électrodynamique quantique." Paris 6, 2012. http://www.theses.fr/2012PA066146.
Full textCadoret, Malo. "Application des oscillations de Bloch d'atomes ultra-froids et de l'interférométrie atomique à la mesure de h/m et à la détermination de la constante de structure fine." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2008. http://tel.archives-ouvertes.fr/tel-00345636.
Full textAfin de mesurer précisément la vitesse de recul de l'atome, nous lui transférons de façon cohérente un très grand nombre d'impulsions de recul à l'aide de la méthode des oscillations de Bloch. Un senseur inertiel interférométrique de type Ramsey-Bordé symétrique à base de transitions Raman stimulées sélectives en vitesse permet de mesurer par effet Doppler, la variation de vitesse des atomes. Nous présentons une nouvelle détermination de la constante de structure fine présentant une incertitude statistique de 3 ppb. Un étude détaillée des effets systématiques est présentée. L'incertitude associée aux effets systématiques est de 3,4 ppb. L'incertitude finale résultant de cette nouvelle détermination de la constante de structure fine est de 4,6 ppb. Il s'agit de la détermination de la constante de structure fine la plus précise, indépendante de l'électrodynamique quantique.
Cadoret, Malo. "Application des oscillations de Block d'atomes ultra-froids et de l'interférométrie atomique à la mesure de h/m et à la détermination de la constante de structure fine." Paris 6, 2008. https://tel.archives-ouvertes.fr/tel-00345636.
Full textZhang, Shougang. "Déplacement de fréquence dû au rayonnement du corps noir dans une fontaine atomique à césium et amélioration des performances de l'horloge." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2004. http://tel.archives-ouvertes.fr/tel-00007074.
Full textBATTESTI, Rémy. "Accélération d'atomes ultrafroids ; mesure de h/M." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2003. http://tel.archives-ouvertes.fr/tel-00003972.
Full textla vitesse de recul Vr d'un atome. Cette mesure permet de
déduire le rapport h/M, où h désigne la constante de Planck
et M la masse de l'atome considéré, afin d'obtenir la valeur
de la constante de structure fine. Le principe de
l'expérience est le suivant. A partir d'un nuage d'atomes froids,
nous sélectionnons une classe de vitesse subrecul à l'aide d'une
transition Raman. Ensuite, nous accélérons les atomes de manière
cohérente à l'aide d'une onde stationnaire dans le référentiel de
l'atome (cet effet est analogue aux oscillations de Bloch en
physique du solide). Enfin, nous mesurons la vitesse finale des
atomes par une nouvelle transition Raman. La connaissance des
vitesses finale et initiale nous permet de remonter à la quantité
de mouvement transférée et donc à la vitesse de recul de l'atome.
Nous présentons dans ce manuscrit les premiers résultats de ce
travail expérimental.
Chapelet, Frédéric. "Fontaine atomique double de césium et de rubidium avec une exactitude de quelques 1E-16 et applications." Paris 11, 2008. http://www.theses.fr/2008PA112094.
Full textAtomic fountains are the most accomplished development of atomic clocks based on the cesium atom whose hyperfine resonance defines the SI second since 1967. Today these systems are among those which realize the second with the best accuracy. We present the last developments of the cold cesium and rubidium atom dual fountain experiment at LNE-SYRTE. This unique dual setup would allow obtaining an outstanding resolution in fundamental physics tests based on atomic transition frequency comparisons. In order to enable operation with both atomic species simultaneously, we have designed, tested and implemented on the fountain new collimators which combine the laser lights corresponding to each atom. By comparing our rubidium fountain to another cesium fountain over a decade, we performed a test of the stability of the fine structure constant at the level of 5E-16 per year. We carried on the work on the clock accuracy and we focused on the phase gradients effects in the interrogation cavity and on the microwave leakage. The fountain accuracy has been evaluated to 4E-16 for the cesium clock and to 5E-16 for the refurbished rubidium clock. As a powerful instrument of metrology, our fountain was implicated in many clock comparisons and contributed many times to calibrate the International Atomic Time. Furthermore, we used the fountain to perform a new test of Lorentz local invariance
Sortais, Yvan. "Construction d'une fontaine double à atomes froids de 87Rb et 133Cs ; Etude des effets dépendant du nombre d'atomes dans une fontaine." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2001. http://tel.archives-ouvertes.fr/tel-00001065.
Full textmesurés simultanément par une méthode différentielle. La modélisation de l'évolution du nuage atomique dans la fontaine permet de confronter nos mesures avec les prédictions théoriques sur les longueurs de diffusion en onde "s". Par ailleurs, la comparaison des fréquences hyperfines du Rb et du Cs dans des fontaines indépendantes nous a permis de réaliser un test de la dérive de la constante de structure fine \alpha au niveau de
7 x 10^{-15}.an^{-1}. Afin d'améliorer ce test, nous avons construit une fontaine pouvant fonctionner simultanément au Rb et au Cs. Les améliorations techniques apportées sur cette
horloge, conjointement à une nouvelle procédure de mesure du déplacement collisionnel du Cs, devraient permettre d'explorer la gamme d'exactitude des 10^{-16} pour ces deux alcalins.
Zineddine, Hamid. "Contribution a l'etude de complexes de cations de transition et de lanthanides avec des peptides fonctionnels, synthese, electrochimie, spectrometrie structurale." Aix-Marseille 1, 1987. http://www.theses.fr/1987AIX11104.
Full textAndia, Manuel. "Oscillations de Bloch d'atomes ultra-froids : application aux mesures de haute précision." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066241/document.
Full textThis work developed around three experiments. The first one concerned the measurement of the ratio h/m between Planck's constant and rubidium atomic mass. We have carried out a thorough study of systematic effects, such as the Gouy phase or the quadratic Zeeman effect. The development of a new compact and high-power laser source (12W@780nm) allowed to decrease the effect of Gouy phase by a factor of 4. The second experiment revolved around the realization of a compact and precise gravimeter, using Bloch oscillations to maintain atoms against gravity. This allowed for a measurement of local gravity acceleration with a promising preliminary sensitivity of 4.7E-7 g in 1s. Finally, the third experiment consisted in the realization of the double diffraction technique, with the aim of implementing Bloch-oscillation-based large momentum transfer beamsplitters
Chapelet, Frédéric. "Fontaine atomique double de césium et de rubidium avec une exactitude de quelques 10^-16 et applications." Phd thesis, Université Paris Sud - Paris XI, 2008. http://tel.archives-ouvertes.fr/tel-00319950.
Full textDoucet, Laurence. "Caractérisation mécanique et physico-chimique des matériaux métalliques et diélectriques dans des structures d'interconnexions destinées à la micro-électronique." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0113.
Full textDebleds, François. "Complexation d'électrophiles aromatiques par des bases hétérocycliques ambidentes : structure et réactivité d'adduits carbones et azotes pyrroliques indoliques et imidazoliques." Paris 6, 1987. http://www.theses.fr/1987PA066330.
Full textHassenforder, Philippe. "Preparation et etude de couches minces cristallines de polydiacetylenes." Paris 6, 1988. http://www.theses.fr/1988PA066289.
Full textBouet, Gilles. "Etude structurale et analytique de complexes d'halogénures d'éléments 3D : mx::(2) (M = co,ni,cu; X = cl,br) et de diverses aldoximes furanniques." Angers, 1987. http://www.theses.fr/1987ANGE0009.
Full textCorre, David Louis. "Using the fine structure "constant" to probe Dark Energy." Dissertação, 2015. https://repositorio-aberto.up.pt/handle/10216/82308.
Full textCorre, David Louis. "Using the fine structure "constant" to probe Dark Energy." Master's thesis, 2015. https://repositorio-aberto.up.pt/handle/10216/82308.
Full textBorbely, Joseph S. "Separated oscillatory field microwave measurement of the n=2 3P1 -to- n=2 3P2 fine-structure interval of helium /." 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:NR51680.
Full textTypescript. Includes bibliographical references (leaves 219-222). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:NR51680
Murphy, Michael T. "Probing variations in the fundamental constants with quasar absorption lines /." 2002. http://www.library.unsw.edu.au/~thesis/adt-NUN/public/adt-NUN20030919.083142/index.html.
Full textGeorge, Matthew Charles. "Precision measurement of the n=2 phosphorus-3 intervals of atomic helium : a determination of the fine-structure constant /." 2003.
Find full textTypescript. Includes bibliographical references (leaves 124-126). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://gateway.proquest.com/openurl?url%5Fver=Z39.88-2004&res%5Fdat=xri:pqdiss &rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:NQ99172
Calkins, Keith G. "Absolute optical frequency measurements of the cesium D₁ transitions and their effect on alpha, the fine-structure constant." 2005. http://etd.nd.edu/ETD-db/theses/available/etd-04112005-175414/.
Full textAngstmann, Elizabeth Physics Faculty of Science UNSW. "Effects of the variation of fundamental constants in atoms." 2007. http://handle.unsw.edu.au/1959.4/40529.
Full text