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Isotope effect in collision between helium atom and hydrogen bromide molecule
  • ISSN号：1674-1056
  • 期刊名称：《中国物理B：英文版》
  • 时间：0
  • 分类：O561.5[理学—原子与分子物理;理学—物理]
  • 作者机构：[1]安庆师范学院物理与电气工程学院,安庆246133, [2]贵州师范大学理学院,贵阳550001
  • 相关基金：安徽省高等学校自然科学研究项目;国家自然科学基金（10676025）
作者： 余春日[1], 程新路[2], 杨向东[2]
关键词： 同位素效应, 角分布, He-HBr体系, isotope effect, angular distribution, He-HBr system
中文摘要：

基于作者构造的He-HBr体系的各向异性势,采用密耦方法计算了碰撞能量分别为60和100 meV时3He、4He、6He和7He被HBr分子散射的角分布,详细讨论了氦同位素对散射角分布的影响.结果表明：在相同碰撞能量时,随着同位素氦原子质量的增加,总微分截面在0°时的角分布逐渐增大,同一级衍射振荡极小值位置逐渐向小散射角方向移动;弹性与总非弹性截面交界角逐渐减小,总非弹性截面逐渐增加.碰撞能量越低,入射同位素He原子的质量越大,彩虹现象越明显.

英文摘要：

Angular distribution for scatterings of ^3He,^4He,^6He and ^7He with hydrogen bromide molecules are calculated by using close-coupling approach from the anisotropic intermolecular potential of the He-HBr system established by the author. The calculations are performed separately at the collision energies of 60 and 100 meV. The influences of He isotope atoms on angular distribution is discussed in detail. The results show that the angular distribution of the total differential cross section （DCS） at zero degree increases and the position of oscillation minimum of the same order gradually shift towards small scattering angle along with the increase of the incident isotope He atom mass at identical collision energy. And crossing angle between the elastic and total inelastic DCS gradually decreases and the total inelastic DCS gradually increases. The rainbow phenomenon become more evident for the lower the collision energy and the larger mass of the incident He isotope atom.

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期刊信息
  • 《中国物理B：英文版》
  • 中国科技核心期刊
  • 主管单位:中国科学院
  • 主办单位:中国物理学会和中国科学院物理研究所
  • 主编：欧阳钟灿
  • 地址：北京 中关村 中国科学院物理研究所内
  • 邮编：100080
  • 邮箱：
  • 电话：010-82649026 82649519
  • 国际标准刊号：ISSN：1674-1056
  • 国内统一刊号：ISSN：11-5639/O4
  • 邮发代号:
  • 获奖情况:
  • 国内外数据库收录:
  • 被引量:406