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The double differential cross sections for electron impact single ionization of helium at incident energies of 32.5, 36.5 and 40.7 eV are calculated by using the DS3C model. The calculated results are compared with the experimental date. The exchange effects are discussed. The single differential cross section for electron impact single ionization of helium is obtained by integrating the double differential cross sections over the angle of the ejected electron. The single differential cross sections of helium at incident energies of 32.5, 36.5, 40.7 and 50 eV are calculated by using the 3C model and the DS3C model. The calculated results are compared with the experimental date. The structure of the cross section is analysed and the contribution of exchange effect to the corss section is discussed.
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Keywords:
- DS3C model /
- double differential cross section /
- single differential cross section /
- screening effect
[1] Röder J, Ehrhardt H, Bray I, Fursa D V 1997 J. Phys. B: At. Mol. Opt. Phys. 30 1309
[2] Chen Z J, Xu K Z 1999 J. Phys. B: At. Mol. Opt. Phys. 32 1259
[3] Isaacs W A, Baertschy M, Mccurdy C W, Rescigno T N 2001 Phys. Rev. A 63 030704
[4] Scott M P, Stitt T, Scott N S, Burke P G 2002 J. Phys. B: At. Mol. Opt. Phys. 35 L323
[5] Childers J G, James K E, Hughes M, Bray I, Baertschy M, Khakoo M A 2003 Phys. Rev. A 68 030702
[6] Bray I, Fursa D V, Stelbovics A T 2003 J. Phys. B: At. Mol. Opt. Phys. 36 2211
[7] Childers J G, James K E, Bray I, Baertschy M, Khakoo M A 2004 Phys. Rev. A 69 022709
[8] Schow E, Hazlett K, Childers J G, Medina C, Vitug G, Bray I, Fursa D V, Khakoo M A 2005 Phys. Rev. A 72 062717
[9] Colgan J, Pindzola M S 2006 Phys. Rev. A 74 012713
[10] Zhang S M, Wu X J, Sun R, Yang H, Gao K, Zhou J 2007 Acta Phys. Sin. 56 6378 (in Chinese)[张穂萌, 吴兴举, 孙瑞, 杨欢, 高矿,周军 2007 56 6378]
[11] Zhang S M, Wu X J, Sun R, Yang H, Gao K, Zhou J 2008 J. At. Mol. Phys. 25 887 (in Chinese)[张穂萌,吴兴举,孙瑞,杨欢,高矿, 周军 2008 原子与分子 25 887]
[12] Hahn Y K, Zerrad E 2011 J. Phys. B: At. Mol. Opt. Phys. 44 165201
[13] Yang H, Zhang S M, Xing L L, Wu X J, Yuan H 2012 Acta Phys. Sin. 61 133401 (in Chinese)[杨欢,张穂萌, 邢玲玲,吴兴举,袁好 2012 61 133401]
[14] Bray I, Stelbovics A T 1993 Phys. Rev. Lett. 70 746
[15] Brauner M, Briggs J S, Klar H 1989 J. Phys. B: At. Mol. Opt. Phys. 22 2265
[16] Berakdar J, Briggs J S 1994 Phys. Rev. Lett. 72 3799
[17] Chen Z J, Shi Q C, Zhang S M, Chen J, Xu K Z 1997 Phys. Rev. A 56 R2514
[18] Zhang S M 2000 J. Phys. B: At. Mol. Opt. Phys. 33 3545
[19] Yang H, Xing L L, Zhang S M, Wu X J 2011 Acta Phys. Sin. 60 103402 (in Chinese) [杨欢, 邢玲玲, 张穂萌, 吴兴举 2011 60 103402]
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[1] Röder J, Ehrhardt H, Bray I, Fursa D V 1997 J. Phys. B: At. Mol. Opt. Phys. 30 1309
[2] Chen Z J, Xu K Z 1999 J. Phys. B: At. Mol. Opt. Phys. 32 1259
[3] Isaacs W A, Baertschy M, Mccurdy C W, Rescigno T N 2001 Phys. Rev. A 63 030704
[4] Scott M P, Stitt T, Scott N S, Burke P G 2002 J. Phys. B: At. Mol. Opt. Phys. 35 L323
[5] Childers J G, James K E, Hughes M, Bray I, Baertschy M, Khakoo M A 2003 Phys. Rev. A 68 030702
[6] Bray I, Fursa D V, Stelbovics A T 2003 J. Phys. B: At. Mol. Opt. Phys. 36 2211
[7] Childers J G, James K E, Bray I, Baertschy M, Khakoo M A 2004 Phys. Rev. A 69 022709
[8] Schow E, Hazlett K, Childers J G, Medina C, Vitug G, Bray I, Fursa D V, Khakoo M A 2005 Phys. Rev. A 72 062717
[9] Colgan J, Pindzola M S 2006 Phys. Rev. A 74 012713
[10] Zhang S M, Wu X J, Sun R, Yang H, Gao K, Zhou J 2007 Acta Phys. Sin. 56 6378 (in Chinese)[张穂萌, 吴兴举, 孙瑞, 杨欢, 高矿,周军 2007 56 6378]
[11] Zhang S M, Wu X J, Sun R, Yang H, Gao K, Zhou J 2008 J. At. Mol. Phys. 25 887 (in Chinese)[张穂萌,吴兴举,孙瑞,杨欢,高矿, 周军 2008 原子与分子 25 887]
[12] Hahn Y K, Zerrad E 2011 J. Phys. B: At. Mol. Opt. Phys. 44 165201
[13] Yang H, Zhang S M, Xing L L, Wu X J, Yuan H 2012 Acta Phys. Sin. 61 133401 (in Chinese)[杨欢,张穂萌, 邢玲玲,吴兴举,袁好 2012 61 133401]
[14] Bray I, Stelbovics A T 1993 Phys. Rev. Lett. 70 746
[15] Brauner M, Briggs J S, Klar H 1989 J. Phys. B: At. Mol. Opt. Phys. 22 2265
[16] Berakdar J, Briggs J S 1994 Phys. Rev. Lett. 72 3799
[17] Chen Z J, Shi Q C, Zhang S M, Chen J, Xu K Z 1997 Phys. Rev. A 56 R2514
[18] Zhang S M 2000 J. Phys. B: At. Mol. Opt. Phys. 33 3545
[19] Yang H, Xing L L, Zhang S M, Wu X J 2011 Acta Phys. Sin. 60 103402 (in Chinese) [杨欢, 邢玲玲, 张穂萌, 吴兴举 2011 60 103402]
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