Abstract

Full quantum mechanical calculations are performed to determine the broadening in the far wings of the cesium D1
and D2 line shapes arising from elastic collisions of Cs atom with inert helium atoms. The potential energy curves of the
low-lying CsHe molecular states, as well as the related transition dipole moments, are carefully computed from ab initio
methods based on state-averaged complete active space self-consistent field–multireference configuration interaction (SACASSCF–
MRCI) calculations, involving the spin–orbit effect, and taking into account the Davidson and BSSE corrections.
The absorption and emission reduced coefficients are determined in the temperature and wavelength ranges of 323–3000 K
and 800–1000 nm, respectively. Both profiles of the absorption and the emission are dominated by the free–free transitions,
and exhibit a satellite peak in the blue wing near the wavelength 825 nm, attributed to B2S+ 1/2

Information

Item Type:	Journal
Divisions:	» Laboratory of Physics for Matter and Radiation
ePrint ID:	1982
Date Deposited:	2019-11-02
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/en/publication/article/1982

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