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学科主题: 物理化学
题名: High Resolution Study on High Excited Rydberg H Atom Scattering with o-D2
作者: Yu SR(俞盛锐) ;  Yuan KJ(袁开军) ;  Yuan JC(袁九闯) ;  Dai DX(戴东旭) ;  Yang XM(杨学明)
会议文集: Conference on Molecular Energy Transfer 2011 Book of abstracts
会议名称: Conference on molecular energy transfer 2011
会议日期: 2011-9-11
出版日期: 2011
会议地点: 牛津
其他题名: 高里德堡态氢原子与氘分子散射的高分辨研究
通讯作者: 杨学明
出版者: 待补充
出版地: 待补充
合作性质: 墙报
部门归属: 1102
主办者: 牛津大学
摘要: The dynamics of Rydberg-atom (RA) collisions with atoms or molecules has been the subject of several decades of study. In 2005, reactive RA scattering crossed-beam experiments on the RA reaction H*+D2→D*+HD have been carried out by Xueming Yang et al.1 and by Wrede et al.2 at the limited angular range respectively. They both found that this reactive scattering presents strong similarities to the H++D2→HD+D+ reaction. In order to compare of these two processes in detail, a quantitative experimental picture of Rydberg H atom scattering with D2 is still lacking relative to the theoretical results of ionic reaction. In the present work, full quantum-state resolved scattering of a highly excited Rydberg H(n=46) atom with D2 (v=0, j=0) has been carried out by using high-resolution Rydberg H/D atom time-of-flight method at the collision energy of 0.53eV. From experimental results, both inelastic and reactive scattering are significant in this system. In H* inelastic scattering with D2, nuclear spin in D2 is clearly conserved. The differential cross sections for the D2 product at v’=0 and 1 from inelastic scattering show the reverse distributed tendency: D2 (v’=0) have obvious forward scattering and D2 (v’=1) have backward scattering. This experimental observation shows the same behaviour for the simplest and most studied of all neutral–neutral collisions. Relative to inelastic scattering, only about 16.85±1.69% product belongs to reactive scattering in the H (n=46)-D2 collisions. Even though, the rotational distribution of the HD products has nearly statistical rotational distribution as the theoretical results. The total differential cross section for that reactive scattering shows obvious forward scattering what is not the same as the result of theoretical calculations which show symmetry in forward-backward scattering directions. That disagreement between experiment and theory suggests that there may be inherent differences between the Rydberg atom scattering and ionic reaction. Reference: 1. C. C. Wang, G. R. Wu, S. A. Harich, H. Song, M. Hayes, R. T. Skodje, X.Y. Wang, D. Gerlich, and X. M. Yang, Phys. Rev. Lett. 95, 013201(2005). 2. E. Wrede, L. Schnieder, K. Seekamp-Schnieder, B. Niederjohann, and K. H. Welge, Phys. Chem. Chem. Phys. 7, 1577 (2005).
英文摘要: The dynamics of Rydberg-atom (RA) collisions with atoms or molecules has been the subject of several decades of study. In 2005, reactive RA scattering crossed-beam experiments on the RA reaction H*+D2→D*+HD have been carried out by Xueming Yang et al.1 and by Wrede et al.2 at the limited angular range respectively. They both found that this reactive scattering presents strong similarities to the H++D2→HD+D+ reaction. In order to compare of these two processes in detail, a quantitative experimental picture of Rydberg H atom scattering with D2 is still lacking relative to the theoretical results of ionic reaction. In the present work, full quantum-state resolved scattering of a highly excited Rydberg H(n=46) atom with D2 (v=0, j=0) has been carried out by using high-resolution Rydberg H/D atom time-of-flight method at the collision energy of 0.53eV. From experimental results, both inelastic and reactive scattering are significant in this system. In H* inelastic scattering with D2, nuclear spin in D2 is clearly conserved. The differential cross sections for the D2 product at v’=0 and 1 from inelastic scattering show the reverse distributed tendency: D2 (v’=0) have obvious forward scattering and D2 (v’=1) have backward scattering. This experimental observation shows the same behaviour for the simplest and most studied of all neutral–neutral collisions. Relative to inelastic scattering, only about 16.85±1.69% product belongs to reactive scattering in the H (n=46)-D2 collisions. Even though, the rotational distribution of the HD products has nearly statistical rotational distribution as the theoretical results. The total differential cross section for that reactive scattering shows obvious forward scattering what is not the same as the result of theoretical calculations which show symmetry in forward-backward scattering directions. That disagreement between experiment and theory suggests that there may be inherent differences between the Rydberg atom scattering and ionic reaction. Reference: 1. C. C. Wang, G. R. Wu, S. A. Harich, H. Song, M. Hayes, R. T. Skodje, X.Y. Wang, D. Gerlich, and X. M. Yang, Phys. Rev. Lett. 95, 013201(2005). 2. E. Wrede, L. Schnieder, K. Seekamp-Schnieder, B. Niederjohann, and K. H. Welge, Phys. Chem. Chem. Phys. 7, 1577 (2005).
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/115967
Appears in Collections:中国科学院大连化学物理研究所_会议论文

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Recommended Citation:
Yu SR,Yuan KJ,Yuan JC,et al. High Resolution Study on High Excited Rydberg H Atom Scattering with o-D2[C]. 见:Conference on molecular energy transfer 2011. 牛津. 2011-9-11.
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