共面不对称条件下Ag+(4p,4d)(e,2e)反应三重微分截面的理论研究

周丽霞; 燕友果

doi:10.7498/aps.61.043401

摘要

采用扭曲波玻恩近似(DWBA)理论计算了共面不对称几何条件下Ag+(4p6) 及Ag+(4d10)在不同入射电子能量和散射电子角度下(e,2e)反应的三重微分截面. 散射电子角度为4, 10和20. 计算结果表明, Ag+(4p6)(e,2e)反应的三重微分截面其binary峰峰位或劈裂峰的谷位与动量转移方向有较大差别, 这可能是由于一种两次两体碰撞造成的. 另外, 还发现Ag+(4p6)(e,2e)反应三重微分截面的binary峰出现了反常劈裂现象, 这表明离子靶内壳层电离(e,2e)反应过程较外壳层更为复杂.对Ag+(4p6)及Ag+(4d10), 除binary峰和recoil峰以外, 在其他敲出电子角度出现了新的峰, 本文用几种两次两体碰撞过程对这些新的峰进行了解释.

关键词:

Abstract

The three-body distorted-wave Born approximation is used to calculate the (e,2e) triple differential cross sections (TDCSs) of Ag+(4p10) and Ag+(4d10) in different kinematical variables in coplanar asymmetric geometry. The angles 4, 10 and 20 are selected as the scattering electron angles. We find that the position of binary peak or the dip between split peaks are not in the direction of momentum transfer, which is probably ascribed to one kind of double-binary collision. We also find that the binary peaks show abnormal splits for Ag+(4p10). Such abnormal splits indicate that an (e,2e) process for inner valence orbital of ionic target becomes more complicated than for outer valence orbital. Furthermore, beside the binary peak and the recoil peak, some pronounced peaks appear at certain ejected angles in the (e,2e) TDCSs of Ag+(4p10) and Ag+(4d10). We consider that these pronounced peaks are probably related to one kind of double-binary collision.

Keywords:

作者及机构信息

1.
中国石油大学(华东)物理科学与技术学院, 东营 257061

基金项目: 山东省自然科学基金(批准号:Q2008A07)资助的课题.

Authors and contacts

1.
College of Physics Science and Technology, China University of Petroleum, Dongying 257061, China

Funds: Project supported by the Natural Science Foundation of Shandong Provincial, China (Grant No. Q2008A07).

参考文献

[1]	Wu X J, Chen X J, Shan X, Chen L Q, Xu K Z 2004 Chin. Phys. 13 1857
[2]	Zhang Z, Kyle O, Han X M, Chen X J 2010 Acta Phys. Sin. 59 1695 (in Chinese) [张哲, Kyle Obergfell, 韩先明, 陈向军 2010 物理学报 59 1695]
[3]	Sun S Y, Jia X F, Miao X Y, Zhang J F, Xie Y, Li X W, Shi W Q 2009 Chin. Phys. B 18 2744
[4]	Roy A, Roy K, Sil N C 1982 J. Phys. B: At. Mol. Opt. Phys. 15 1289
[5]	Biswas R, Sinha C 1995 J. Phys. B: At. Mol. Opt. Phys. 28 1311
[6]	Biswas R, Sinha C 1994 Phys. Rev. A 50 354
[7]	Jia X F, Shi Q C, Chen Z J, Chen J, Xu K Z 1997 Phys. Rev. A 55 1971
[8]	Shi Q C, Chen Z J, Chen J, Xu K Z 1997 J. Phys. B: At. Mol. Opt. Phys. 30 2859
[9]	Khajuria Y, Tripathi D N 1999 Phys. Rev. A 59 1197
[10]	Ehrhardt H, Hesselbacher K H, Jung K, Schubert E, Willmann K 1974 J. Phys. B: At. Mol. Opt. Phys. 7 69
[11]	Chen L Q, Chen X J, Wu X J, Shan X, Xu K Z 2005 J. Phys. B: At. Mol. Opt. Phys. 38 1371
[12]	Zhou L X, Yan Y G, Men F D 2010 Chin. Phys. B 19 073401
[13]	McCarthy I E 1995 Aust. J. Phys. 48 1
[14]	Gianturco F A, SCialla S 1987 J. Phys. B: At. Mol. Phys. 20 3171
[15]	Brauner M, Briggs J S 1993 J. Phys. B: At. Mol. Phys. 26 2451

施引文献

[1]	Wu X J, Chen X J, Shan X, Chen L Q, Xu K Z 2004 Chin. Phys. 13 1857
[2]	Zhang Z, Kyle O, Han X M, Chen X J 2010 Acta Phys. Sin. 59 1695 (in Chinese) [张哲, Kyle Obergfell, 韩先明, 陈向军 2010 物理学报 59 1695]
[3]	Sun S Y, Jia X F, Miao X Y, Zhang J F, Xie Y, Li X W, Shi W Q 2009 Chin. Phys. B 18 2744
[4]	Roy A, Roy K, Sil N C 1982 J. Phys. B: At. Mol. Opt. Phys. 15 1289
[5]	Biswas R, Sinha C 1995 J. Phys. B: At. Mol. Opt. Phys. 28 1311
[6]	Biswas R, Sinha C 1994 Phys. Rev. A 50 354
[7]	Jia X F, Shi Q C, Chen Z J, Chen J, Xu K Z 1997 Phys. Rev. A 55 1971
[8]	Shi Q C, Chen Z J, Chen J, Xu K Z 1997 J. Phys. B: At. Mol. Opt. Phys. 30 2859
[9]	Khajuria Y, Tripathi D N 1999 Phys. Rev. A 59 1197
[10]	Ehrhardt H, Hesselbacher K H, Jung K, Schubert E, Willmann K 1974 J. Phys. B: At. Mol. Opt. Phys. 7 69
[11]	Chen L Q, Chen X J, Wu X J, Shan X, Xu K Z 2005 J. Phys. B: At. Mol. Opt. Phys. 38 1371
[12]	Zhou L X, Yan Y G, Men F D 2010 Chin. Phys. B 19 073401
[13]	McCarthy I E 1995 Aust. J. Phys. 48 1
[14]	Gianturco F A, SCialla S 1987 J. Phys. B: At. Mol. Phys. 20 3171
[15]	Brauner M, Briggs J S 1993 J. Phys. B: At. Mol. Phys. 26 2451

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