Cd+离子5s2S1/2→5p2P3/2电子碰撞激发截面和退激辐射光子极化度的理论研究

焦飞; 蒋军; 颉录有; 张登红; 董晨钟; 陈展斌

doi:10.7498/aps.64.233401

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Cd+离子5s2S1/2→5p2P3/2电子碰撞激发截面和退激辐射光子极化度的理论研究

焦飞 , 蒋军 , 颉录有 , 张登红 , 董晨钟 , 陈展斌

Cd+离子5s2S1/2→5p2P3/2电子碰撞激发截面和退激辐射光子极化度的理论研究

焦飞, 蒋军, 颉录有, 张登红, 董晨钟, 陈展斌

物理学报. 2015, 64(23): 233401.

doi: 10.7498/aps.64.233401.

摘要

本文采用全相对论扭曲波方法计算了Cd+离子5s2S1/2 → 5p2P3/2电子碰撞激发总截面、磁能级的激发截面以及退激辐射光子极化度. 详细讨论了电子关联效应对激发截面以及退激辐射光子极化度的影响. 我们发现, 在低能碰撞部分(80 eV), Core-价关联的贡献不是非常明显, 但与不考虑Core-价关联的结果相比, 其激发截面也降低了15%. 然而, 对于退激辐射光子极化度, Core-价关联的贡献非常小, 其影响是可以忽略的.

关键词:

作者及机构信息

1.
甘肃省原子分子物理与功能材料重点实验室, 西北师范大学物理与电子工程学院, 兰州 730070

通信作者: 蒋军, jiangjun@nwnu.edu.cn;dongcz@nwnu.edu.cn ; 董晨钟, jiangjun@nwnu.edu.cn;dongcz@nwnu.edu.cn ;

基金项目: 国家自然科学基金(批准号: 11274254, U1332206, U1331122, 11464042)资助的课题.

参考文献

[1]	Xu K Z 2006 Atom and Molecule Physics (2nd Ed.) (Beijing: Science Press) pp1-5 (in Chinese) [徐克尊 2006 高等原子分子物理学(第2版) (北京: 科学出版社) 第1–5页]
[2]	Bostock C J, Fursa D V, Bray I 2014 Phys. Rev. A 90 012
[3]	Bostock C J 2011 J. Phys. B 44 083001
[4]	Fursa D V, Bray I 2008 Phys. Rev. Lett. 100 113201
[5]	Gomonai A 2003 Optics and Spectroscopy 94 488
[6]	Sharma L, Surzhykov A, Srivastava R, Fritzsche S 2011 Phys. Rev. A 83 062701
[7]	Goto T, Hane K, Okuda M, Hattori S 1983 Phys. Rev. A 27 1844
[8]	Sharma L, Srivastava R, Stauffer A D 2008 Phys. Rev. A 78 014701
[9]	Gangwar R K, Sharma L, Srivastava R, Stauffer A D 2010 Phys. Rev. A 81 052707
[10]	Chauhan R K, Srivastava R, Stauffer A D 2005 J. Phys. B 38 2385
[11]	Zatsarinny O I, Bandurina L A 2000 Optics and Spectroscopy 89 488
[12]	Parpia F A, Froese F C, Grant I P 1996 Compt. Phys. Commun. 94 249
[13]	Jiang J, Dong C Z, Xie L Y, Wang J G, Yan J, Fritzsche S 2007 Chin. Phys. Lett. 24 691
[14]	Jiang J, Dong C Z, Xie L Y, Wang J G 2008 Phys. Rev. A 78 022709
[15]	Percival I C, Seaton M J 1958 Philos. Trans. R. Soc. London A 251 113
[16]	Reed K J, Chen M H 1993 Phys. Rev. A 48 3644
[17]	Berezhko E G, Kabachnik N M 1977 J. Phys. B 10 2467
[18]	Xu H L, Persson A, Svanberg S, Blagoev K, Malcheva G, Pentchev V, Bi'emont E, Campos J, Ortiz M, Mayo R 2004 Phys. Rev. A 70 042508

施引文献

[1]	Xu K Z 2006 Atom and Molecule Physics (2nd Ed.) (Beijing: Science Press) pp1-5 (in Chinese) [徐克尊 2006 高等原子分子物理学(第2版) (北京: 科学出版社) 第1–5页]
[2]	Bostock C J, Fursa D V, Bray I 2014 Phys. Rev. A 90 012
[3]	Bostock C J 2011 J. Phys. B 44 083001
[4]	Fursa D V, Bray I 2008 Phys. Rev. Lett. 100 113201
[5]	Gomonai A 2003 Optics and Spectroscopy 94 488
[6]	Sharma L, Surzhykov A, Srivastava R, Fritzsche S 2011 Phys. Rev. A 83 062701
[7]	Goto T, Hane K, Okuda M, Hattori S 1983 Phys. Rev. A 27 1844
[8]	Sharma L, Srivastava R, Stauffer A D 2008 Phys. Rev. A 78 014701
[9]	Gangwar R K, Sharma L, Srivastava R, Stauffer A D 2010 Phys. Rev. A 81 052707
[10]	Chauhan R K, Srivastava R, Stauffer A D 2005 J. Phys. B 38 2385
[11]	Zatsarinny O I, Bandurina L A 2000 Optics and Spectroscopy 89 488
[12]	Parpia F A, Froese F C, Grant I P 1996 Compt. Phys. Commun. 94 249
[13]	Jiang J, Dong C Z, Xie L Y, Wang J G, Yan J, Fritzsche S 2007 Chin. Phys. Lett. 24 691
[14]	Jiang J, Dong C Z, Xie L Y, Wang J G 2008 Phys. Rev. A 78 022709
[15]	Percival I C, Seaton M J 1958 Philos. Trans. R. Soc. London A 251 113
[16]	Reed K J, Chen M H 1993 Phys. Rev. A 48 3644
[17]	Berezhko E G, Kabachnik N M 1977 J. Phys. B 10 2467
[18]	Xu H L, Persson A, Svanberg S, Blagoev K, Malcheva G, Pentchev V, Bi'emont E, Campos J, Ortiz M, Mayo R 2004 Phys. Rev. A 70 042508

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物理学报. 2015, 64(23): 233401.

doi: 10.7498/aps.64.233401.

Cd+离子5s2S1/2→5p2P3/2电子碰撞激发截面和退激辐射光子极化度的理论研究

1. 甘肃省原子分子物理与功能材料重点实验室, 西北师范大学物理与电子工程学院, 兰州 730070

通信作者: 蒋军, jiangjun@nwnu.edu.cn;dongcz@nwnu.edu.cn ; 董晨钟, jiangjun@nwnu.edu.cn;dongcz@nwnu.edu.cn ;

基金项目:

国家自然科学基金(批准号: 11274254, U1332206, U1331122, 11464042)资助的课题.

收稿日期: 2015-07-15
修回日期: 2015-08-22
刊出日期: 2015-12-05

摘要: 本文采用全相对论扭曲波方法计算了Cd+离子5s2S1/2 → 5p2P3/2电子碰撞激发总截面、磁能级的激发截面以及退激辐射光子极化度. 详细讨论了电子关联效应对激发截面以及退激辐射光子极化度的影响. 我们发现, 在低能碰撞部分(80 eV), Core-价关联的贡献不是非常明显, 但与不考虑Core-价关联的结果相比, 其激发截面也降低了15%. 然而, 对于退激辐射光子极化度, Core-价关联的贡献非常小, 其影响是可以忽略的.

关键词:

English Abstract

Theoretical study on electron-impact excitation cross section and polarization for 5s2S1/2 → 5p2P3/2 of Cd

1.
Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China

Fund Project:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11274254, U1332206, U1331122, 11464042).

Received Date: 15 July 2015
Accepted Date: 22 August 2015
Published Online: 05 December 2015

Abstract: The electron-impact excitation (EIE) cross-sections of 5s2S1/2 → 5p2P3/2 of Cd+ have been calculated by using the relativistic distorted-wave (RDW) method which we have developed recently. In order to discuss the electronic correlation effects, four different models are used to describe the target wave functions, namely Model A, 8S, 5SD and 6SD. Model A is a single configuration model, it includes 5s1/2, 5p1/2 and 5p3/2 only. The 8S is a valence-valence correlation model, it considers the impacts of 6s, 7s, 8s and 6p, 7p, 8p orbitals on wave function of 5s1/2, 5p3/2, respectively. The 5SD is a core-valence correlation model, it includes all the virtual single and double excitations from the 4s, 4p, 4d, 5s and 5p shells into the unoccupied 4f, 5p, 5d, and 5f shells. The 6SD is also a core-valence correlation model, it includes all the virtual single and double excitations from the 4s, 4p, 4d, 5s and 5p shells into the unoccupied 4f, 5p, 5d, 5f, 6s, 6p and 6d shells. The oscillator strength calculated by Model A is 0.72, which is in disagreement with the experiment 0.55 measured by Xu et al., while the results of 6SD 0.57 is in agreement with these of the experiment very well. For the EIE cross-sections, the core-valence correlation is very important. The results of Model A and 8S are larger than the experimental results obtained by Gomonai et al., while the results of 5SD and 6SD is obviously smaller than the results of Model A. In low energy range (2P3/2 → 5s2S1/2 emission lines after excitation are very small, while the linear polarization of Model A, 5SD and 6SD are in consistent with each other and also in good agreement with other theories. But for high energies, the theoretical results have big difference from the experimental results obtained by Goto et al.

Keywords:

electron-impact excitation cross sections /
polarization /
relativistic distorted-wave (RDW) method /
core-valence correlation

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