### Abstract

We present a new wave packet based theory for the direct calculation of energy-transfer moments in molecular collision processes. This theory does not contain any explicit reference to final state information associated with the collision dynamics, thereby avoiding the need for determining vibration - rotation bound states (other than the initial state) for the molecules undergoing collision and also avoiding the calculation of state-to-state transition probabilities. The theory applies to energy-transfer moments of any order, and it generates moments for a wide range of translational energies in a single calculation. Two applications of the theory are made that demonstrate its viability; one is to collinear He + H_{2} and the other to collinear He + CS_{2} (with two active vibrational modes in CS_{2}). The results of these applications agree well with earlier results based on explicit calculation of transition probabilities.

Original language | English |
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Pages (from-to) | 947-952 |

Number of pages | 6 |

Journal | Journal of Physical Chemistry A |

Volume | 103 |

Issue number | 7 |

Publication status | Published - 1999 |

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### ASJC Scopus subject areas

- Physical and Theoretical Chemistry

### Cite this

*Journal of Physical Chemistry A*,

*103*(7), 947-952.