Memory Effects During Collisional Energy Transfer from Highly Vibrationally Excited CS2

ALEXANDER CHIMBAYO,; BEATRIZ M. TOSELLI; JOHN R. BARKER

ELSEVIER SCIENCE BV

Año: 1996 p. 225 - 225

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