Rotational excitation in molecular collisions: A strong coupling approximation
β Scribed by Thomas P. Tsien; Russel T. Pack
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- English
- Weight
- 311 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
β¦ Synopsis
Eeccived 21 May 1970 A genera&&on of Takayanagils fully auantum mechanical strong coupling approximation for rotationally inelastic collisior,s. valid for small energy exchange,. is discussed and tested numericaILy on ft. model problem. The m&hoc? is co~~u~~on~tly very simple, and the results are most encouraging.
π SIMILAR VOLUMES
The exponential Born approximation is used to compute S matrices and opacilies for rotational Eransitions in a model system corresponding to a heavy atom-heavy diatomic coilision. The rcsufts are in good agreement with the exact catculations in the limited coupling region. The use of the exponentia
Exact computations for rotational excitation are compared with the close-coupling approximation and with improved schemes which incorporate adiabatically the closed channels. The "direct ~ transition probability and the resonance energies can be predicted by a modified close-coupling scheme.
Two different but complementary perturbation solutions to a two-state strong vibronic coupling model are presented. ' Here (&!?&n phys the same role as K in eq. (53) of ref. [ 11. Our calculation differs from the strong-coupling calculation in ref. [I] in two respects: (a) in the harmonic approximat