Dynamical constraints on the transfer of angular momentum in rotationally inelastic collisions of I2(B 3Π) with He and Xe

Abstract Inelastic collisions involving molecular species are key to energy transfer in gaseous environments. They are commonly governed by an energy gap law, which dictates that transitions are dominated by those between initial and final states with roughly the same ro-vibrational energy. Transitions involving rotational inelasticity are often further constrained by the rotational angular momentum. Here, we demonstrate using full-dimensional quantum scattering on an ab initio based global potential energy surface (PES) that HF–HF inelastic collisions do not obey the energy and angular momentum gap laws. Detailed analyses attribute the failure of gap laws to the exceedingly strong intermolecular interaction. On the other hand, vibrational state-resolved rate coefficients are in good agreement with existing experimental results, validating the accuracy of the PES. These new and surprising results are expected to extend our understanding of energy transfer and provide a quantitative basis for numerical simulations of hydrogen fluoride chemical lasers.

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Dynamical constraints on angular momentum transfer between polar molecules

Chemical Physics Letters ◽

10.1016/0009-2614(85)85473-7 ◽

1985 ◽

Vol 122 (1-2) ◽

pp. 37-40 ◽

Cited By ~ 1

Author(s):

P.M. Agrawal ◽

N.C. Agrawal

Keyword(s):

Angular Momentum ◽

Momentum Transfer ◽

Polar Molecules ◽

Angular Momentum Transfer ◽

Dynamical Constraints

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New experimental evidences for dynamical constraints on angular momentum transfer in heavy molecules–light particles collisions: I*2(B)+4He,3He, H2, D2

The Journal of Chemical Physics ◽

10.1063/1.448052 ◽

1984 ◽

Vol 81 (7) ◽

pp. 3002-3008 ◽

Cited By ~ 21

Author(s):

J. Derouard ◽

N. Sadeghi

Keyword(s):

Angular Momentum ◽

Momentum Transfer ◽

Angular Momentum Transfer ◽

Dynamical Constraints ◽

Light Particles

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On the Nonspherical Scattering Amplitude for Inelastic Molecular Collisions

Zeitschrift für Naturforschung A ◽

10.1515/zna-1970-0304 ◽

1970 ◽

Vol 25 (3) ◽

pp. 336-350 ◽

Cited By ~ 5

Author(s):

W. E. Köhler ◽

S. Hess ◽

L. Waldmann

Keyword(s):

Angular Momentum ◽

Bulk Viscosity ◽

Interaction Potential ◽

Scattering Amplitude ◽

Inelastic Collisions ◽

Momentum Dependence ◽

Molecular Collisions ◽

Molecular Scattering ◽

Polarized Beam ◽

Linear Molecules

The rotational angular momentum dependence of the nonspherical scattering amplitude is investigated for inelastic collisions of linear molecules. As far as the approximation of small nonsphericity can be applied, this dependence is obtained from the angular momentum dependence of the nonspherical interaction potential. The connection between the nonspherical scattering amplitude and observables that can be measured by molecular scattering experiments involving a polarized beam is discussed. Some qualitative remarks are made on collision brackets occurring in the theoretical expressions for the bulk viscosity and for the Senftleben-Beenakker effect for H2 and HD

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