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Expériences d'optique atomique cohérente ou non avec un jet superfin d'atomes métastables de gaz rares

Abstract : In this thesis, we present a new type of atomic source: an ultra-narrow beam of metastable atoms produced by resonant metastability exchange inside a supersonic beam of rare gas atoms. We used the coherence properties of this beam to observe diffraction of metastable helium, argon and neon atoms by a nano-transmission grating and by micro-reflection-gratings. Then, we evidenced transitions between Zeeman sublevels of neon metastable 3P2 state due to the to the quadrupolar part of van der Waals potential. After we showed experimental proofs of the observation of this phenomenon, we calculated the transition probabilities in the Landau - Zener model. We discussed the interest of van der Waals - Zeeman transitions for atom interferometry. Last, we described the Zeeman cooling of the supersonic metastable argon beam (3P2). We gave experimental details and showed the first time-of-flight measurements we got of slowed atoms.
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https://tel.archives-ouvertes.fr/tel-00260947
Contributor : Jules Grucker <>
Submitted on : Wednesday, March 5, 2008 - 4:58:41 PM
Last modification on : Saturday, February 15, 2020 - 1:56:24 AM
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Jules Grucker. Expériences d'optique atomique cohérente ou non avec un jet superfin d'atomes métastables de gaz rares. Physique Atomique [physics.atom-ph]. Université Paris-Nord - Paris XIII, 2007. Français. ⟨tel-00260947⟩

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