TY - JOUR

T1 - Quasi-molecular emission and nonadiabatic transitions

T2 - II. Ca(4s4p1P, 4s3d 1D)-He(1s2,1S0) quasi-molecule

AU - Bichutskaya, E. N.

AU - Devdariani, A. Z.

AU - Zagrebin, A. L.

PY - 2000/12/1

Y1 - 2000/12/1

N2 - 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".

AB - 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".

KW - COLLISIONS

UR - http://www.scopus.com/inward/record.url?scp=33749509201&partnerID=8YFLogxK

U2 - 10.1134/1.626772

DO - 10.1134/1.626772

M3 - Article

VL - 88

SP - 197

EP - 202

JO - OPTICS AND SPECTROSCOPY

JF - OPTICS AND SPECTROSCOPY

SN - 0030-400X

IS - 2

ER -