中国物理B ›› 2006, Vol. 15 ›› Issue (12): 2920-2927.doi: 10.1088/1009-1963/15/12/026

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Collisional quantum interference on rotational energy transfer: Physical interpretation of the differential interference angle

李永庆, 李 健, 马凤才   

  1. Department of Physics, Liaoning University, Shenyang 110036, China
  • 收稿日期:2005-07-28 修回日期:2006-07-18 出版日期:2006-12-20 发布日期:2006-12-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10374040).

Collisional quantum interference on rotational energy transfer: Physical interpretation of the differential interference angle

Li Yong-Qing (李永庆), Li Jian(李健), and Ma Feng-Cai(马凤才)†   

  1. Department of Physics, Liaoning University, Shenyang 110036, China
  • Received:2005-07-28 Revised:2006-07-18 Online:2006-12-20 Published:2006-12-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10374040).

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摘要： Collisional quantum interference (CQI) on the intramolecular rotational energy transfer is observed in an experiment with a static cell, and the integral interference angles are measured. To obtain more accurate information, an experiment with a molecular beam is carried out, and thereby the relationship between the differential interference angle and the scattering angle is obtained. Based on the first-Born approximation of time-dependent perturbation theory, the theoretical model of CQI is developed in an atom--diatom system in the condition of the molecular beam, with the long-range interaction potential taken into account. The method of measuring correctly the differential interference angle is presented. The tendencies of the differential interference angle changing with the impact parameter and relative velocity are discussed. The theoretical model presented here is important for understanding or performing the experiment in the molecular beam.

Abstract: Collisional quantum interference (CQI) on the intramolecular rotational energy transfer is observed in an experiment with a static cell, and the integral interference angles are measured. To obtain more accurate information, an experiment with a molecular beam is carried out, and thereby the relationship between the differential interference angle and the scattering angle is obtained. Based on the first-Born approximation of time-dependent perturbation theory, the theoretical model of CQI is developed in an atom--diatom system in the condition of the molecular beam, with the long-range interaction potential taken into account. The method of measuring correctly the differential interference angle is presented. The tendencies of the differential interference angle changing with the impact parameter and relative velocity are discussed. The theoretical model presented here is important for understanding or performing the experiment in the molecular beam.

Key words: collisional quantum interference, rotational energy transfer, interference angle, long-range interaction potential

中图分类号:  (Rotational and vibrational energy transfer)

  • 34.50.Ez
33.15.Mt (Rotation, vibration, and vibration-rotation constants) 34.10.+x (General theories and models of atomic and molecular collisions and interactions (including statistical theories, transition state, stochastic and trajectory models, etc.)) 34.20.-b (Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions)