Depolarization in H2O-He collisions

作者：Dagdigian Paul J^*; Alexander Millard

来源：Molecular Physics, 2010, 108(7-9): 1159-1169.

DOI：10.1080/00268971003667440

• molecular collisions
• tensor cross-sections
• elastic depolarization cross-sections

Elastic tensor and elastic depolarization cross-sections for collisions of specified rotational levels of H2O with helium are determined using an accurate ab initio potential energy surface computed by Patkowski et al. The elastic depolarization cross-sections display large maxima at low collision energies due to shape resonances and generally decrease smoothly with increasing collision energy, with superimposed sharp peaks due to resonances with quasibound van der Waals levels associated with higher rotational asymptotes. The cross-sections show a striking dependence upon the k-projection quantum numbers of the rotational levels, as well as a general decrease in magnitude with increasing values of the total rotational angular momentum j.

• 出版日期2010