## Abstract

The energy corrected sudden (ECS) scaling theory is applied to rotation-translation (R-T) and rotation-rotation (R-R) energy transfer in the H_{2}-H_{2} and HF-HF systems. The ECS scaling predictions are in very good agreement with the exact quantal values. Two physically important results are particularly transparent in the scaling analysis: (1) The well-known effectiveness of Ortho H_{2} in rotational relaxation can be traced directly to the higher tensor order interactions which are also operative in para H_{2} for j≥2; and (2) transitions in which rotational quanta are conserved differ appreciably from those in which rotational quanta are not conserved. Scaling predictions, using different values for the average collision range l_{c}, are compared to the exact quantal cross sections. The results indicate that essentially the same value for l_{c} wil be determined by inspection of the dynamical solutions and by the scaling analysis. This point is of importance for future applications of the ECS scaling theory.

Original language | English (US) |
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Pages (from-to) | 4685-4692 |

Number of pages | 8 |

Journal | The Journal of chemical physics |

Volume | 72 |

Issue number | 9 |

DOIs | |

State | Published - 1980 |

## All Science Journal Classification (ASJC) codes

- Physics and Astronomy(all)
- Physical and Theoretical Chemistry

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