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Spectroscopie vibrationnelle à deux photons de l'ion H2+: développement d'une source laser à 9,166µm.

Abstract : The proton to electron mass ratio determination by using H2+ vibrational spectroscopy requires theoretical and experimental determinations of the transition frequencies with an uncertainty in the kHz range. Nowadays, the relativistic and radiative corrections computations reach an uncertainty of a few tens of kHz which allow a high resolution spectroscopy experiment. The experiment we have built is composed of two parts. The first is the setup to prepare the ions cloud, and to detect the vibrational transition. It is based on a selective photodissociation of H2+ vibrational states in an hyperbolic Paul trap. The second part is a laser source tunable in the 9.2 microns range, with a linewidth of the order of 1 kHz, a stability of the order of 10 Hz in 100 s and optical power output of 50 mW in the cw regime. This source allowed us to realize the formic acid high resolution spectroscopy.
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https://tel.archives-ouvertes.fr/tel-00199877
Contributor : Franck Bielsa <>
Submitted on : Wednesday, December 19, 2007 - 5:27:09 PM
Last modification on : Thursday, December 10, 2020 - 12:38:45 PM
Long-term archiving on: : Thursday, September 27, 2012 - 11:55:50 AM

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  • HAL Id : tel-00199877, version 1

Citation

Franck Bielsa. Spectroscopie vibrationnelle à deux photons de l'ion H2+: développement d'une source laser à 9,166µm.. Physique Atomique [physics.atom-ph]. Université Pierre et Marie Curie - Paris VI, 2007. Français. ⟨tel-00199877⟩

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