The Cs 6S-7S-6P3/2 forbidden three-level system : analytical description of the inhibited fluorescence and optical rotation spectra

M. A. Bouchiat (1) , J. Guéna (1) , Ph. Jacquier (1) , M. Lintz (1) , L. Pottier (1)

1 LSH-ENS - Laboratoire de Spectroscopie Hertzienne de l'ENS

With a view to improved parity violation measurements in Cs, we have considered the 6S-7S-6P3/2 « forbidden three-level system », in which one laser excites the forbidden 6S-7S transition while a second, colinear laser probes the excited 7S atoms. This paper presents an analytical calculation of the 7S → 6P ½ fluorescence intensity and of the probe amplification as functions of the laser frequencies. The collisional processes in the 6P 3/2 resonance level, as well as the level multiplicity and the laser polarizations are taken into account. The quantitative agreement with experiment is good ; in particular, the observed sub-Doppler structures are correctly described. The damping rates of the 7S-6P3/2 cohérence and of the trapped 6P3/2 atoms are extracted. New détection schemes for detecting a 7S orientation, with direct possible extension to an alignment, are demonstrated.

Mots clés: atom atom collisions; atomic excited states; atomic fluorescence; atomic resonant states; caesium; laser beam effects; optical rotation; weak interactions atomic physics

Domaines: Articles anciens

M. A. Bouchiat, J. Guéna, Ph. Jacquier, M. Lintz, L. Pottier. The Cs 6S-7S-6P3/2 forbidden three-level system : analytical description of the inhibited fluorescence and optical rotation spectra. Journal de Physique, 1989, 50 (2), pp.157-199. ⟨10.1051/jphys:01989005002015700⟩. ⟨jpa-00210910⟩