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Theses

Spectroscopie photoassociative des états moléculaires faiblement liés du rubidium :
Analyse par la méthode de Lu-Fano.
Étude de la réalisation d'une lentille à atomes.

Abstract : This thesis is composed of two parts. The first part presents the study of the realization of a lens for atoms using the dipolar interaction. A theoretical study suggests several possible experimental sequences allowing the realization of an achromatic lens with a controllable magnification. Attempts at realizing the sequence highlighted atom losses induced by the laser. The process of photoassociation, strongly probable under the experimental conditions, is responsible of these losses. The second part of this thesis reports on the recording of the photoassociation spectra. The analysis of the spectra obtained was carried out using the Lu-Fano graphs methods, which is often used in the physics of Rydberg atomic states. Applied to the three observed vibrational series, the method showed that the LeRoy-Bernstein formula, established to describe vibrational levels located in the asymptotic zone of the molecular potential, must be improved. The two suggested improvements consist in taking into account the short-range region of the potential well and the second term of the multipolar expansion. For a third series, the Lu-Fano graph exhibits a coupling between two vibrational series due to the spin-orbit and spin-spin interactions. The graph allowed a quantitative characterization of this coupling.
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https://tel.archives-ouvertes.fr/tel-00189099
Contributor : Haikel Jelassi <>
Submitted on : Wednesday, November 21, 2007 - 3:44:36 PM
Last modification on : Monday, February 15, 2021 - 10:37:29 AM
Long-term archiving on: : Friday, November 25, 2016 - 4:51:51 PM

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  • HAL Id : tel-00189099, version 2

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Haikel Jelassi. Spectroscopie photoassociative des états moléculaires faiblement liés du rubidium :
Analyse par la méthode de Lu-Fano.
Étude de la réalisation d'une lentille à atomes.. Physique Atomique [physics.atom-ph]. Université Paris Sud - Paris XI, 2007. Français. ⟨tel-00189099v2⟩

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