类锂离子双电子复合过程中辐射光子角分布和极化特性的理论研究

王金霞; 师应龙; 张登红; 颉录有; 董晨钟

doi:10.7498/aps.62.233401

摘要

基于多组态Dirac-Fock 方法和密度矩阵理论，本文详细计算了高电荷态类锂离子（26 Z 92）KLL 双电子复合过程中，自由电子被共振俘获到中间双激发态1s2s22p3/2J = 1 的磁子能级截面以及该双激发态的取向参数，进而得到了此激发态向基态电偶极辐射跃迁1s2s22p3/2J = 11s22s2J = 0 所发出光子的角分布和极化度,重点讨论了Breit 相互作用对相关物理量的影响. 研究表明，Breit 相互作用极大地改变了中间双激发态1s2s22p3/2J = 1 不同磁子能级的截面，从而导致了随后退激发放出光子的角分布和极化特性的显著变化.

关键词:

Abstract

Based on the multiconfiguration Dirac-Fock method and the theory of density matrix, we have calculated the magnetic sublevel captured cross section of intermediate doubly-excited state 1s2s22p3/2J = 1 formed by dielectronic recombination of lithium-like ions (26 Z 92). Then, we obtain the angular distribution and linear polarization of X-rays of electric-dipole radiation 1s2s22p3/2J = 11s22s2J = 0. In this study, emphasis is placed on the effects of the Breit interaction on the relevant physical quantities. We find that the influences of the Breit interaction on the alignment for the capture to the doubly-excited state 1s2s22p3/2J = 1 are dramatic, resulting in the remarkable change in the angular distribution and polarization properties of the X-ray emission.

Keywords:

angular distribution and polarization degree /
MCDF method /
density matrix theory

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;

2.
西北师范大学与中科院近代物理研究所极端环境原子分子物理实验室, 兰州 730070

基金项目: 国家自然科学基金（批准号：11274254，91126007，11147018）、甘肃省自然科学基金（批准号：1010RJZA014）和西北师范大学科技创新工程科研骨干培育项目资助的课题.

Authors and contacts

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;

2.
Joint Laboratory of Atomic and Molecular Physics, Northwest Normal University and Institute of Modern Physics of Chinese Academy of Sciences, Lanzhou 730070, China

Funds: Project supported by the National Natural Science Fundation of China (Grant Nos. 11274254, 91126007, 11147018), the Natural Science Foundation of Gansu Province, China (Grant No. 1010RJZA014), and the Foundation of Northwest Normal University.

参考文献

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[3]	Fritzsche S, Kabachnik N M, Surzhykov A 2008 Phys. Rev. A 78 032703
[4]	Matula O, Fritzsche S, Surzhykov A 2012 J. Phys. B: At. Mol. Opt. Phys. 45 215004
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[7]	Ou W Y, Shen T M, Chen C Y, Roger H, Zou Y M 2005 Chin. Phys. Lett. 22 2248
[8]	Shen T M, Chen C Y, Wang Y S 2007 Chin. Phys. 16 1008
[9]	Chen M H, Scofield J H 1995 Phys. Rev. A 52 2057
[10]	Weber G, Bräuning H, Surzhykov A, Brandau C, Fritsche S, Geyer S, Hagmann S, Hess S, Kozhuharov C, Märtin R, Petridis N, Reuschl R, Spillmannn U, Trotsenko S, Winters D F A, Stöhlker Th 2010 Phys. Rev. Lett. 105 243002
[11]	Fritzsche S, Surzhykov A, Stöhlker Th 2009 Phys. Rev. Lett. 103 113001
[12]	Wu Z W, Jiang J, Dong C Z 2011 Phys. Rev. A 84 032713
[13]	Hu Z M, Han X Y, Li Y M, Kato D, Tong X M, Nakamura N 2012 Phys. Rev. Lett. 108 073002
[14]	Shi Y L, Dong C Z, Fritzsche S, Zhang D H, Xie L Y 2013 Chin. Rev. Lett. 30 023402
[15]	Zhang D H, Shi Y L, Jiang J, Dong C Z, Fumihiro K 2012 Chin. Phys. B 21 013402
[16]	Yao K, Geng Z, Xiao J, Yang Y, Chen C, Fu Y, Lu D, Hutton R, Zou Y 2010 Phys. Rev. A 81 022714
[17]	Blum K 1981 Density Matrix Theory and Applications (New York: Plenum Press)
[18]	Balashov V V, Grum-Grzhimailo A N, Kabachink N M 2000 Polarization and Correlation Phenomena in Atomic Collisions (New York: Kluwer Academic/Plrnum)
[19]	Zhang H L, Sampson D H 2002 Phys. Rev. A 66 042704
[20]	Berezhko E, Kabachnik N M 1977 J. Phys. B: At. Mol. Phys. 10 2467
[21]	Chen M H, Scofild J H 1995 Phys. Rev. A 52 2057
[22]	Percival I C, Seaton M J 1958 Philos. Trans. R. Soc. London A 251 113
[23]	Fritzsche S, Fischer C F, Dong C Z 2000 Comput. Phys. Commun. 124 340
[24]	Fritzsche S, Aksela H, Dong C Z, Heinäsmäki S, Sienkiewicz J E 2003 Nucl. Instr. and Meth. in Phys. Res. B 205 93
[25]	Jiang J, Dong Z C, Xie L Y Wang J G 2008 Phys. Rev. A 78 022709
[26]	Dyall K G, Grant I P, Johnson C T, Parpia F A, Plummer E P 1989 Comput. Phys. Commun. 55 425
[27]	Harman Z, Tupitsyn I I, Artemyev A N, Jentschura U D, Keitel C H, Crespo López-Urrutia J R, González Martínez A J, Tawara H, Ullrich J 2006 Phys. Rev. A 73 052711
[28]	Grant I P, Mckenzie B J, Norrington P H 1980 Comput. Phys. Commun. 21 207
[29]	Parpia F A, Fischer C F, Grant I P 1996 Comput. Phys. Commun. 94 249
[30]	González Martínez A J, Crespo López-Urrutia J R, Braun J, Brenner G, Bruhns H, Lapierre A, Mironov V, Soria Orts R, Tawara H, Trinczek M, Ullrich J, Artemyev A N, Harman Z, Jentschura U D, Keitel C H, Scofield J H, Tupitsyn I I 2006 Phys. Rev. A 73 052710
[31]	Chen M H 1985 Phys. Rev. A 31 1449
[32]	Shi Y L, Dong C Z, Zhang D H, Fu Y B 2008 Acta Phys. Sin. 57 0088 (in Chinese) [师应龙, 董晨钟, 张登红, 符彦飙 2008 57 0088]

施引文献

[1]	Burgess A 1964 Astrophys. J. 139 776
[2]	Yang J H, Zhang H, Cheng X L 2010 Chin. Phys. B 19 063201
[3]	Fritzsche S, Kabachnik N M, Surzhykov A 2008 Phys. Rev. A 78 032703
[4]	Matula O, Fritzsche S, Surzhykov A 2012 J. Phys. B: At. Mol. Opt. Phys. 45 215004
[5]	Ma X, Mokler P H, Bosch F, Gumberidze A, Kozhuharov C, Liesen D, Sierpowski D, Stachura Z, Stöhlker Th, Warczk A 2003 Phys. Rev. A 68 042712
[6]	Wu Z Q, Li Y M, Duan B, Zhang H, Yan J 2009 Chin. Phys. Lett. 26 123202
[7]	Ou W Y, Shen T M, Chen C Y, Roger H, Zou Y M 2005 Chin. Phys. Lett. 22 2248
[8]	Shen T M, Chen C Y, Wang Y S 2007 Chin. Phys. 16 1008
[9]	Chen M H, Scofield J H 1995 Phys. Rev. A 52 2057
[10]	Weber G, Bräuning H, Surzhykov A, Brandau C, Fritsche S, Geyer S, Hagmann S, Hess S, Kozhuharov C, Märtin R, Petridis N, Reuschl R, Spillmannn U, Trotsenko S, Winters D F A, Stöhlker Th 2010 Phys. Rev. Lett. 105 243002
[11]	Fritzsche S, Surzhykov A, Stöhlker Th 2009 Phys. Rev. Lett. 103 113001
[12]	Wu Z W, Jiang J, Dong C Z 2011 Phys. Rev. A 84 032713
[13]	Hu Z M, Han X Y, Li Y M, Kato D, Tong X M, Nakamura N 2012 Phys. Rev. Lett. 108 073002
[14]	Shi Y L, Dong C Z, Fritzsche S, Zhang D H, Xie L Y 2013 Chin. Rev. Lett. 30 023402
[15]	Zhang D H, Shi Y L, Jiang J, Dong C Z, Fumihiro K 2012 Chin. Phys. B 21 013402
[16]	Yao K, Geng Z, Xiao J, Yang Y, Chen C, Fu Y, Lu D, Hutton R, Zou Y 2010 Phys. Rev. A 81 022714
[17]	Blum K 1981 Density Matrix Theory and Applications (New York: Plenum Press)
[18]	Balashov V V, Grum-Grzhimailo A N, Kabachink N M 2000 Polarization and Correlation Phenomena in Atomic Collisions (New York: Kluwer Academic/Plrnum)
[19]	Zhang H L, Sampson D H 2002 Phys. Rev. A 66 042704
[20]	Berezhko E, Kabachnik N M 1977 J. Phys. B: At. Mol. Phys. 10 2467
[21]	Chen M H, Scofild J H 1995 Phys. Rev. A 52 2057
[22]	Percival I C, Seaton M J 1958 Philos. Trans. R. Soc. London A 251 113
[23]	Fritzsche S, Fischer C F, Dong C Z 2000 Comput. Phys. Commun. 124 340
[24]	Fritzsche S, Aksela H, Dong C Z, Heinäsmäki S, Sienkiewicz J E 2003 Nucl. Instr. and Meth. in Phys. Res. B 205 93
[25]	Jiang J, Dong Z C, Xie L Y Wang J G 2008 Phys. Rev. A 78 022709
[26]	Dyall K G, Grant I P, Johnson C T, Parpia F A, Plummer E P 1989 Comput. Phys. Commun. 55 425
[27]	Harman Z, Tupitsyn I I, Artemyev A N, Jentschura U D, Keitel C H, Crespo López-Urrutia J R, González Martínez A J, Tawara H, Ullrich J 2006 Phys. Rev. A 73 052711
[28]	Grant I P, Mckenzie B J, Norrington P H 1980 Comput. Phys. Commun. 21 207
[29]	Parpia F A, Fischer C F, Grant I P 1996 Comput. Phys. Commun. 94 249
[30]	González Martínez A J, Crespo López-Urrutia J R, Braun J, Brenner G, Bruhns H, Lapierre A, Mironov V, Soria Orts R, Tawara H, Trinczek M, Ullrich J, Artemyev A N, Harman Z, Jentschura U D, Keitel C H, Scofield J H, Tupitsyn I I 2006 Phys. Rev. A 73 052710
[31]	Chen M H 1985 Phys. Rev. A 31 1449
[32]	Shi Y L, Dong C Z, Zhang D H, Fu Y B 2008 Acta Phys. Sin. 57 0088 (in Chinese) [师应龙, 董晨钟, 张登红, 符彦飙 2008 57 0088]

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