Quantum scattering of OH(X{sup 2}{pi}) with He({sup 1}S): Propensity features in rotational relaxation at ultralow energies
- Department of Chemistry and CNISM, University of Rome, 'La Sapienza', Piazzale A. Moro 5, 00185, Rome (Italy)
The collisional relaxation of rotationally ''hot'' OH molecules in He as a buffer gas has been studied as a fully quantum event using an ab initio potential energy surface and the exact dynamical coupling of the relevant angular momenta during the process. The range of energies considered corresponds to the ultralow temperatures of cold traps and the calculations were carried out down to the Wigner regime of cross section behavior. It is shown that the general dependence of the inelastic processes on rotational angular momentum and parity clearly indicates a fairly marked size dependence of the final cross sections on the specific fine structure levels in which the target radical is being prepared to undergo relaxation.
- OSTI ID:
- 20974574
- Journal Information:
- Physical Review. A, Vol. 73, Issue 2; Other Information: DOI: 10.1103/PhysRevA.73.022703; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
Similar Records
Zeeman relaxation of MnH (X{sup 7}{Sigma}{sup +}) in collisions with {sup 3}He: Mechanism and comparison with experiment
Quantum studies of inelastic collisions of O/sub 2/(X-italic /sup 3/. sigma. /sup -//sub g-italic/) with He: Polarization effects and collisional propensity rules