Ar-H2(D2, T2)碰撞体系的振转相互作用势及散射截面的理论计算

底马可; 沈光先; 赵云强; 曾若生; 汪荣凯

doi:10.7498/aps.64.133101

摘要

用量子力学从头算的耦合族CCSD(T)方法, 使用相关一致基组aug-cc-pV5Z并加3s3p2d1f1g高斯键函数计算了Ar原子与H2分子的振转相互作用和电荷分布, 采用Boys和Bernardi提出的均衡法消除了基组重叠误差(BSSE). 然后用Tang-Toennies势能函数拟合得到Ar-H2体系相互作用势的解析表达式. 在该相互作用势下, 用密耦方法计算了Ar原子入射能量为83 meV时, Ar-H2(D2, T2)碰撞体系的散射截面. 计算Ar-D2体系的微分截面与实验值比较符合很好. 计算结果及分析表明, 在长程吸引势的散射中, 色散能起主要作用; 在短程排斥势的散射中, 交换能起重要作用. 当碰撞参数在0.27 nm至0.47 nm的范围时, Ar-H2(D2, T2)碰撞体系的径向偶极发生两次转向.

关键词:

Abstract

Based on the ab initio coupled-cluster CCSD(T) method in quantum mechanics, the charge distribution of Ar atom and its vib-rotational interaction with H2 molecule are calculated using augmented correlation consistent basis sets aug-cc-pV5Z and 3s3p2d1f1g Gaussian bonding function, and the basis set superposition error (BSSE) is eliminated using Boy and Bernardi's full counterpoise method. Afterwards, the analytical expression of the interaction potential of the Ar-H2 system is fitted with Tang-Toennies potential function. With this interaction potential, the scattering cross section of Ar-H2(D2, T2) collision system is calculated by using close-coupling method when the incident energy of Ar atoms is 83 meV. The calculated differential cross section of Ar-D2 collision system is consistent with the experimental results. Calculated result and analysis show that the dispersion energy plays a key role in the long-range attractive potential scattering, and the exchange energy plays an important role in the short-range repulsive potential scattering. The direction of the radial dipole of the Ar-H2 (D2, T2) collision system is turned twice in the range of impact parameters from 0.27 to 0.47 nm.

Keywords:

作者及机构信息

1.
贵州师范大学化学与材料科学学院, 贵阳 550001;

2.
贵州师范大学物理与电子科学学院, 贵阳 550001

基金项目: 国家自然科学基金(批准号:21101038,21461006,51472053)和贵州省科技厅与贵州师范大学联合基金(批准号:黔科合J字LKS[2009]01)资助的课题.

Authors and contacts

1.
School of Chemistry and Material Science, Guizhou Normal University, Guiyang 550001, China;

2.
School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, China

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 21101038, 21461006, 51472053), and the United Foundation of Science and Techenolegy Department of Guizhou Province and Guizhou Normal University, China (Grant No. 2009J01).

参考文献

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[2]	Chen J G, Wang R Q, Zhai Z, Chen J, Fu P M, Wang B B, Liu W M 2012 Phys. Rev. A 86 033417
[3]	Wei H, Le Roy R J, Wheatley R, Meath W J 2005 J. Chem. Phys. 122 084321
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[38]	Yang X D 1992 Theoretical Calculation and Program of Atomic and Molecular Collision (Chengdu: University of Electronic Science and Technology Press) (in Chinese) [杨向东 1992 原子和分子碰撞理论计算及程序(成都: 电子科技大学出版社)]
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[42]	Zhu Z H, Yu H G 1997 Molecular Structure and Potential Energy Function (Beijing: Science Press) pp98-99 (in Chinese) [朱正和, 俞华根1997 分子结构与分子势能函数(北京: 科学出版社) 第98-99页]
[43]	Murrell J N, Carter S, Farantos S C, Huxley P, Varandas A J C 1984 Molecular Potential Energy Functions (New York: John Wiley & Sons Ltd) pp3-10
[44]	Bransden B H 1983 Atomic Collision Theory (Benjamin: Cummings Publishing Company) p12
[45]	Shen G X, Wang R K, Linghu R F, Yang X D 2008 Acta Phys. Sin. 57 155 (in Chinese) [沈光先, 汪荣凯, 令狐荣锋, 杨向东 2008 物理学报 57 155]
[46]	Shen G X, Wang R K, Linghu R F, Yang X D 2011 Acta Phys. Sin. 60 013101 (in Chinese) [沈光先, 汪荣凯, 令狐荣锋, 杨向东 2011 物理学报 60 013101]

施引文献

[1]	Liang Z X, Zhang Z D, Liu W M 2005 Phys. Rev. Lett. 94 050402
[2]	Chen J G, Wang R Q, Zhai Z, Chen J, Fu P M, Wang B B, Liu W M 2012 Phys. Rev. A 86 033417
[3]	Wei H, Le Roy R J, Wheatley R, Meath W J 2005 J. Chem. Phys. 122 084321
[4]	Li Y F, Linghu R F, Xu M 2013 J. Sichuan Univ. (Natural Science Edition) 50 1053 (in Chinese) [李应发, 令狐荣锋, 徐梅 2013 四川大学学报(自然科学版) 50 1053]
[5]	Zeng J Y 2000 Quantum Mechanics Vol. 1 (Third Edition) (Beijing: Science Press) pp650-651 (in Chinese) [曾谨言 2000 量子力学卷I(第三版)(北京: 科学出版社) 第650-651页]
[6]	Gong M Y, Xu X T, Feng E Y 2011 Chin. Phys. B 20 113401
[7]	Gong M Y, Hu X L, Chen X, Niu M, Feng E Y 2010 Chin. Phys. B 19 063401
[8]	McKellar A R W, Welsh H L 1971 J. Chem. Phys. 55 595
[9]	Waaijer M, Reuss J 1981 Chem. Phys. 63 263
[10]	McKellar A R W 1982 Faraday Discuss. Chem. Soc. 73 89
[11]	McKellar A R W 1996 J. Chem. Phys. 105 2628
[12]	Bissonnette C, Chuaqui C E, Crowell K G, Le Roy R J, Wheatley R J, Meath W J 1996 J. Chem. Phys. 105 2639
[13]	Rulis M, Smith K M, Scoles G 1978 Can. J. Phys. 56 753
[14]	Toennies J P, Welz W, Wolf G 1979 J. Chem. Phys. 71 614
[15]	Buck U 1982 Faraday Discuss. Chem. Soc. 73 187
[16]	Buck U, Meyer H, Le Roy R J 1984 J. Chem. Phys. 80 5589
[17]	Le Roy R J, Carley J S 1980 Adv. Chem. Phys. 42 353
[18]	Tang K T, Toennies J P 1981 J. Chem. Phys. 74 1148
[19]	Rodwell W R, Scoles G 1982 J. Phys. Chem. 86 1053
[20]	Le Roy R J, Hutson J M 1987 J. Chem. Phys. 86 837
[21]	Williams H L, Szalewicz K, Jeziorski B, Moszynski R, Rybak S 1993 J. Chem. Phys. 98 1279
[22]	Moszynski R, Jeziorski B, Rybak S, Szalewicz K, Williams H L 1994 J. Chem. Phys. 100 5080
[23]	Bissonnette C, Chuaqui C E, Crowell K G, Le Roy R J, Wheatley R J, Meath W J 1996 J. Chem. Phys. 105 2639
[24]	Woon D E, Peterson K A, Dunning J T H 1998 J. Chem. Phys. 109 2233
[25]	Waldron L, Liu W K, Le Roy R J 2002 J. Mol. Stru. 591 245
[26]	Navrotskaya I, Geva E 2007 J. Phys. Chem. A 111460
[27]	Balakrishnan N, Hubartt B C, Ohlinger L, Forrey R C 2009 Phys. Rev. A 80 012704
[28]	Paolini S, Ohlinger L, Forrey R C 2011 Phys. Rev. A 83 042713
[29]	Espinho S, Felizardo E, Tatarova E, Dias F M, Ferreira C M 2013 Appl. Phys. Lett. 102 114101
[30]	Głaz W, Bancewicz T, Godet J L, Gustafsson M, Maroulis G, Haskopoulos A 2014 J. Chem. Phys. 141 074315
[31]	Gustafsson M, Głaz W, Bancewicz T, Godet J L, Maroulis G, Haskapoulos A 2014 J. Phys. Conference Series 548 012027
[32]	Pople J A, Head-Gordon M, Raghavachari K 1987 J. Chem. Phys. 87 5968
[33]	Kendall R A, Dunning J T H, Harrison R J 1992 J. Chem. Phys. 96 6796
[34]	Woon D E, Dunning J T H 1993 J. Chem. Phys. 98 1358
[35]	Boys S F, Bernadi F 1970 Mol. Phys. 19 533
[36]	Wang R K, Shen G X, Yu C R, Yang X D 2008 Acta Phys. Sin. 57 6932 (in Chinese) [汪荣凯, 沈光先, 余春日, 杨向东 2008 物理学报 57 6932]
[37]	Choi B H, Tang K T 1975 J. Chem. Phys. 63 1775
[38]	Yang X D 1992 Theoretical Calculation and Program of Atomic and Molecular Collision (Chengdu: University of Electronic Science and Technology Press) (in Chinese) [杨向东 1992 原子和分子碰撞理论计算及程序(成都: 电子科技大学出版社)]
[39]	Jeziorski B, Moszynski R, Szalewicz K 1994 Chem. Rev. 94 1887
[40]	Huber K P, Herzberg G 1979 Molecular Spectrum and Molecular Structure (IV) Constants of Diatomic Molecules (New York: Van Nostrand Reinhold Company) p250
[41]	Frisch M J, Trucks G W, Schlegel H B, Scuseria G E, Robb M A, Cheeseman J R, Montgomery J A, Vreven J T, Kudin K N, Burant J C, Millam J M, Iyengar S S, Tomasi J, Barone V, Mennucci B, Cossi M, Scalmani G, Rega N, Petersson G A, Nakatsuji H, Hada M, Ehara M, Toyota K, Fukuda R, Hasegawa J, Ishida M, Nakajima T, Honda Y, Kitao O, Nakai H, Klene M, Li X, Knox J E, Hratchian H P, Cross J B, Bakken V, Adamo C, Jaramillo J, Gomperts R, Stratmann R E, Yazyev O, Austin A J, Cammi R, Pomelli C, Ochterski J W, Ayala P Y, Morokuma K, Voth G A, Salvador P, Dannenberg J J, Zakrzewski V G, Dapprich S, Daniels A D, Strain M C, Farkas O, Malick D K, Rabuck A D, Raghavachari K, Foresman J B, Ortiz J V, Cui Q, Baboul A G, Clifford S, Cioslowski J, Stefanov B B, Liu G, Liashenko A, Piskorz P, Komaromi I, Martin R L, Fox D J, Keith T, Al-Laham M A, Peng C Y, Nanayakkara A, Challacombe M, Gill P M W, Johnson B, Chen W, Wong M W, Gonzalez C, Pople J A Gaussian 03, Revision D.01, Gaussian, Inc., Wallingford CT, 2004
[42]	Zhu Z H, Yu H G 1997 Molecular Structure and Potential Energy Function (Beijing: Science Press) pp98-99 (in Chinese) [朱正和, 俞华根1997 分子结构与分子势能函数(北京: 科学出版社) 第98-99页]
[43]	Murrell J N, Carter S, Farantos S C, Huxley P, Varandas A J C 1984 Molecular Potential Energy Functions (New York: John Wiley & Sons Ltd) pp3-10
[44]	Bransden B H 1983 Atomic Collision Theory (Benjamin: Cummings Publishing Company) p12
[45]	Shen G X, Wang R K, Linghu R F, Yang X D 2008 Acta Phys. Sin. 57 155 (in Chinese) [沈光先, 汪荣凯, 令狐荣锋, 杨向东 2008 物理学报 57 155]
[46]	Shen G X, Wang R K, Linghu R F, Yang X D 2011 Acta Phys. Sin. 60 013101 (in Chinese) [沈光先, 汪荣凯, 令狐荣锋, 杨向东 2011 物理学报 60 013101]

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