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

作     者：李永庆 李健 马凤才 

作者机构：Department of Physics Liaoning University Shenyang 110036 China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2006年第15卷第12期

页      面：2920-2927页

核心收录：

学科分类：07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 070205[理学-凝聚态物理] 08[工学] 0702[理学-物理学] 

基　　金：Project supported by the National Natural Science Foundation of China (Grant No 10374040)  

主　　题：collisional quantum interference rotational energy transfer interference angle longrange interaction potential 

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 rel- ative velocity are discussed. The theoretical model presented here is important for understanding or performing the experiment in the molecular beam.