Quasi-molecular emission and nonadiabatic transitions: II. Ca(4s4p1P, 4s3d 1D)-He(1s2,1S0) quasi-molecule

E. N. Bichutskaya, A. Z. Devdariani, A. L. Zagrebin

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Calculations are made of the quasi-molecular emission spectra formed in thermal collisions of Ca(4s4p, P-1, 4s3d, D-1) and He(1s(2), S-1(0)) atoms. The calculations are made within the framework of Demkov model [1] and in the trajectory approach on rectilinear trajectories and in the quasi-static approximation. It is shown that the Demkov model can be used for the description of the spectrum even in the case where nonadiabatic transitions are absent or negligibly weak. A rapid variation of the quasi-molecular radiative width leads to the formation of a peak in the spectrum, which is shifted to the blue wing with respect to the position of the forbidden 3(1)D --> 4(1)S(0) atomic transition. (C) 2000 MAIK "Nauka/Interperiodica".

Original languageEnglish
Pages (from-to)197-202
Number of pages6
JournalOptics and Spectroscopy (English translation of Optika i Spektroskopiya)
Issue number2
StatePublished - 1 Dec 2000

Scopus subject areas

  • Atomic and Molecular Physics, and Optics



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