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Memory effects during collisional energy transfer from highly excited CS2

โœ Scribed by Alexander Chimbayo; Beatriz M. Toselli; John R. Barker

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
565 KB
Volume
259
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

Time dependent thermal lensing has been used to monitor energy transfer from CS 2 (optically excited at 31250 cm-1 ) to Kr gas at 50-600 Tort. The results show that the energy transferred per collision is significantly more efficient at lower collision frequencies: a memory effect. This can be explained with a model which includes collision-free radiationless transitions between excited electronic states and collisional vibrational relaxation within each electronic state. The model also explains why the bulk average energy transfer exhibits a dramatic transition in energy transfer efficiency at bulk average energies corresponding to the triplet state origin.

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