Rubidium D1 and D2 atomic lines' pressure broadened by ground-state helium atoms

F. Bouhadjar; K. Alioua; M. T. Bouazza; M. Bouledroua

Centre des Publications Scientifiques

Rubidium D1 and D2 atomic lines' pressure broadened by ground-state helium atoms

https://www.univ-soukahras.dz/fr/publication/article/326

F. Bouhadjar, K. Alioua, M. T. Bouazza and M. Bouledroua (2014) Rubidium D1 and D2 atomic lines' pressure broadened by ground-state helium atoms. Journal of Physics B: Atomic, Molecular and Optical Physics , 47(), 185201, Institute Of Physics science

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Full quantum calculations are performed to determine the spectral broadening of the rubidium D1 and D2 lines induced by collisions with helium perturbers. The potential curves of the low-lying RbHe molecular states, as well as the corresponding transition dipole moments, are generated theoretically with ab initio methods based on SA-CASSCF-MRCI calculations, including the spin–orbit effects. The absorption and emission coefficients at wavelengths lying between 650 and $950\;{\rm nm}$ and temperatures ranging from 100 to 3000 K are determined. The absorption profile reveals it is dominated by the free–free transitions, whereas the emission spectral shape arises from the free–free and bound–free transitions. The resulting red- and blue-wing profiles are compared with previous experimental and theoretical works.

Item Type:	Journal
Divisions:	» Laboratoire de Physique de la Matière et du Rayonnement
ePrint ID:	326
Date Deposited:	2015-03-07
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/fr/publication/article/326