Theory of excitation transfer in collisions between alkali atoms. I. Identical partners

1969 ◽  
Vol 47 (12) ◽  
pp. 1237-1248 ◽  
Author(s):  
E. I. Dashevskaya ◽  
A. I. Voronin ◽  
E. E. Nikitin
Keyword(s):  
Excitation Energy ◽  
Excited States ◽  
Cross Section ◽  
Electronic Excitation ◽  
Electronic States ◽  
Excitation Transfer ◽  
Electronic Excitation Energy ◽  
Alkali Atoms ◽  
The Cross

A mechanism is derived for nonresonant transfer of electronic excitation energy, induced in the process M*(2P3/2) + M(2S1/2) → M*(2P1/2) + M(2S1/2), where M and M* are identical alkali atoms in the ground and first excited states, respectively. Various types of interactions, responsible for the nonadiabatic combination of electronic states of the quasi molecule M2*, were considered, and their respective contributions to the cross section for excitation transfer were determined.

Theory of excitation transfer in collisions between alkali atoms. II. Dissimilar partners

1970 ◽  
Vol 48 (8) ◽  
pp. 981-992 ◽  
Author(s):  
E. I. Dashevskaya ◽  
E. E. Nikitin ◽  
A. I. Voronin ◽  
A. A. Zembekov
Keyword(s):  
Excitation Energy ◽  
Exchange Interaction ◽  
Cross Sections ◽  
Electronic Excitation ◽  
Dipole Interaction ◽  
Electronic Energy ◽  
Alkali Atom ◽  
Electronic Excitation Energy ◽  
Alkali Atoms ◽  
Experimental Values

Possible mechanisms are considered for the transfer of electronic excitation energy in collisions between an excited alkali atom MA*(2Pj) and an unexcited atom MB(2S1/2). It is shown that a dipole–dipole interaction which is responsible for the transfer of electronic excitation energy in collisions between identical partners (MA = MB) is not sufficient to explain the observed magnitudes of the cross sections and that, therefore, the exchange interaction can no longer be neglected. If the exchange interaction is taken into account, it can be shown that there are regions of nonadiabaticity in the energy diagram, which are probably responsible for the change in the electronic energy states of the collision partners. The calculated cross sections are compared with experimental values.

Theoretical investigation of electronic excitation energy transfer in bichromophoric assemblies

2008 ◽  
Vol 128 (7) ◽  
pp. 074505 ◽  
Author(s):  
Burkhard Fückel ◽  
Andreas Köhn ◽  
Michael E. Harding ◽  
Gregor Diezemann ◽  
Gerald Hinze ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Theoretical Investigation ◽  
Electronic Excitation ◽  
Excitation Energy Transfer ◽  
Electronic Excitation Energy Transfer ◽  
Electronic Excitation Energy
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