๐”– Bobbio Scriptorium
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Energy transfer in molecular collisions far from resonance

โœ Scribed by R.D. Sharma; R.Bradford Malt; R.R. Hart; R.H. Picard

Publisher
Elsevier Science
Year
1975
Tongue
English
Weight
516 KB
Volume
35
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

Transfer of one quantum of vibrational excitation from a CO molecule initizlly in vibrational Iwel 1G to another CO mofecul~ inSalty in its ground vibrational level, a process endothermic by about 236 cm -I, is explained by a second-order distortrd-tive Born calculation. The distortion potent&l is r&en fo be the sphericMy symmetric Lennard-Jones (6-12) potential, and the potential causing the energy transfer is assumed to lx the multipolar interaction. A key factor in the cxphnation is ihe inclusion of the phase shifts due to el&stic scattering bJ; the multipolar potential. The calcuhted vaIue for the cross section may differ from the true value by about 50% due to the urxertainty in the m!ue of the molecule quadrupole moment. The computed cross %?cCion in the exothermic direction is 3.0 X IO-l8 cm2 compared to the experimentd value of 2.6 X 10~"s cm2.

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