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#### Relocking of intrinsic angular momenta in collisions of diatoms with ions: Capture of H_{2}(j=0,1) by H_{2}^{+}

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##### Citation

Dashevskaya, E. I., Litvin, I., Nikitin, E. E., & Troe, J. (2016). Relocking of
intrinsic angular momenta in collisions of diatoms with ions: Capture of H_{2}(j=0,1) by H_{2}^{+}.* Journal of Chemical Physics,* *145*(24): 244315. doi:10.1063/1.4972129.

Cite as: http://hdl.handle.net/11858/00-001M-0000-002C-6802-D

##### Abstract

Rate coefficients for capture of H-2(j = 0,1) by H-2(+) are calculated in perturbed rotor approximation, i.e., at collision energies considerably lower than Bhc (where B denotes the rotational constant of H2). The results are compared with the results from an axially nonadiabatic channel (ANC) approach, the latter providing a very good approximation from the low-temperature Bethe-Wigner to the high temperature Langevin limit. The classical ANC approximation performs satisfactorily at temperatures above 0.1 K. At 0.1 K, the rate coefficient for j = 1 is about 25% higher than that for j = 0 while the latter is close to the Langevin rate coefficient. The Bethe-Wigner limit of the rate coefficient for j = 1 is about twice that for j = 0. The analysis of the relocking of the intrinsic angular momentum of H-2 during the course of the collision illustrates the significance of relocking in capture dynamics in general.