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Electron-loss cross sections in Cq+(q=14)collisions with He,Ne,Ar are measured in the intermediate-velocity regime, and the ratio of the two-electron-loss cross section to the one-electrom-loss cross section, R21, are calculated. It is shown that a single-channel analysis is not sufficient to explain the results, and that projectile electron loss, electron capture by the projectile, and target ionization must be considered together to interpreter the data. The screening and antiscreening theory can annalyse the threshold velocity, but cannot totally explain the data of R21 with velocity increasing. The effective charge of target increases with velocity increasing. Ne and Ar have the same effective charges in the velocity regime, but He has a smaller one at the same velocity. The correlation between loss electrons is also analyzed.
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Keywords:
- ion-atom collision /
- cross section /
- electron loss
[1] Lu Y X, Chen X M, Ding B W, Fu H B, Cui Y, Shao J X, Zhang H Q, Gao Z M 2007 Acta Phys. Sin. 56 4461 (in Chinese) [鲁彦霞、 陈熙萌、 丁宝卫、 付宏斌、 崔 莹、 邵剑雄、 张红强、 高志民 2007 56 4461]
[2] [3] Chen X M, Lu Y X, Ding B W, Liu Y W, Cui Y, Gao Z M, Fu H B, Du J, Shao J X 2007 Chin. Phys. 16 2384
[4] Song M Y, Litsarev M S, Shevelko V P, Tawara H, Yoon J S 2009 Nucl. Instrum. Meth. B 267 2369
[5] [6] Dmitriev I S, Teplova Y A, Belkova Y A, Novikov N V, Fainberg Y A 2010 At. Data Nucl. Data Tab. 96 85
[7] [8] Voitkiv A B 2005 Nucl. Instrum. Meth. B 233 157
[9] [10] [11] Chen X M, Lu Y X, Gao Z M, Cui Y, Liu Y W, Du J 2007 Nucl. Instrum. Meth. B 262 161
[12] Lu Y X, Xiao D T, Yu T, Liu L J, Chen X M, Cui Y, Shao J X 2009 Nucl. Instrum. Meth. B 267 474
[13] [14] Song Z Y, Yang Z H, Shao J X, Cui Y, Zhang H Q, Yuan F F, Du J, Gao Z M, Yu D Y, Chen X M, Cai X H 2009 Chin. Phys. B 18 1443
[15] [16] [17] Liu C L, He B, Yan J, Wang J G 2007 Acta Phys. Sin. 56 327 (in Chinese)[刘春雷、 何 斌、 颜 君、 王建国 2007 56 327]
[18] [19] Shi Y L, Dong C Z, Zhang D H, Fu Y B 2008 Acta Phys. Sin. 57 88 (in Chinese)[师应龙、 董晨钟、 张登红、 符彦飙 2008 57 88]
[20] [21] Montenegro E C, Sigaud G M, Meyerhof W E 1992 Phys. Rev. A 45 1575
[22] [23] Montenegro E C, Meyerhof W E, McGuire J H 1994 Adv. At. Mol. Opt. Phys. 34 249
[24] McGuire J H, Stolterfoht N P, Simony R 1981 Phys. Rev. A 24 97
[25] [26] [27] Bernard S, Elisabeth W R, Roger V R 1982 Nucl. Instrum. Meth. 194 437
[28] [29] Sant' Anna M M, Melo W S, Santos A C F, Sigaud G M, Montenegro E C 1995 Nucl. Instrum. Meth. B 99 46
[30] [31] Sigaud G M, Jora' s F S, Santos A C F, Montenegro E C, Sant' Anna M M, Melo W S 1997 Nucl. Instrum. Meth. B 132 312
[32] [33] Brendle B, Gayet R, Rozet J P, Wohrer K 1985 Phys. Rev. Lett. 54 2007
[34] Wohrer K, Chetioui A, Rozet J P, Jolly A, Fernandez F, Stephan C, Brendle B, Gayet R 1986 J. Phys. B 19 1997
[35] [36] [37] Xu X Y, Montenegro E C, Anholt R, Danzmann K, Meyerhof W E, Schlachter A S, Rude B S, McDonald R J 1988 Phys. Rev. A 38 1848
[38] [39] Chung H K, Lee R W, Chen M H 2007 High Ener. Dens. Phys. 3 342
[40] Chabot M, Wohrer K, Chetioui A, Rozet J P, Touati A, Vernhet D, Politis M F, Stephan C, Grandin J P, Macias A, Martin F, Riera A, Sanz J L, Gayet R 1994 J. Phys. B 27 111
[41] [42] Walters H R J 1975 J. Phys. B 8 54
[43] [44] Woitke O, Za' vodszky P A, Ferguson S M, Houck J H, Tanis J A 1998 Phys. Rev. A 57 2692
[45] [46] McGuire J H 1987 Phys. Rev. A 36 1114
[47] [48] [49] Grande P L, Schiwietz G, Sigaud G M, Montenegro E C 1996 Phys. Rev. A 54 2983
[50] [51] Voitkiv A E, Sigaud G M, Montenegro E C 1999 Phys. Rev. A 59 2794
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[1] Lu Y X, Chen X M, Ding B W, Fu H B, Cui Y, Shao J X, Zhang H Q, Gao Z M 2007 Acta Phys. Sin. 56 4461 (in Chinese) [鲁彦霞、 陈熙萌、 丁宝卫、 付宏斌、 崔 莹、 邵剑雄、 张红强、 高志民 2007 56 4461]
[2] [3] Chen X M, Lu Y X, Ding B W, Liu Y W, Cui Y, Gao Z M, Fu H B, Du J, Shao J X 2007 Chin. Phys. 16 2384
[4] Song M Y, Litsarev M S, Shevelko V P, Tawara H, Yoon J S 2009 Nucl. Instrum. Meth. B 267 2369
[5] [6] Dmitriev I S, Teplova Y A, Belkova Y A, Novikov N V, Fainberg Y A 2010 At. Data Nucl. Data Tab. 96 85
[7] [8] Voitkiv A B 2005 Nucl. Instrum. Meth. B 233 157
[9] [10] [11] Chen X M, Lu Y X, Gao Z M, Cui Y, Liu Y W, Du J 2007 Nucl. Instrum. Meth. B 262 161
[12] Lu Y X, Xiao D T, Yu T, Liu L J, Chen X M, Cui Y, Shao J X 2009 Nucl. Instrum. Meth. B 267 474
[13] [14] Song Z Y, Yang Z H, Shao J X, Cui Y, Zhang H Q, Yuan F F, Du J, Gao Z M, Yu D Y, Chen X M, Cai X H 2009 Chin. Phys. B 18 1443
[15] [16] [17] Liu C L, He B, Yan J, Wang J G 2007 Acta Phys. Sin. 56 327 (in Chinese)[刘春雷、 何 斌、 颜 君、 王建国 2007 56 327]
[18] [19] Shi Y L, Dong C Z, Zhang D H, Fu Y B 2008 Acta Phys. Sin. 57 88 (in Chinese)[师应龙、 董晨钟、 张登红、 符彦飙 2008 57 88]
[20] [21] Montenegro E C, Sigaud G M, Meyerhof W E 1992 Phys. Rev. A 45 1575
[22] [23] Montenegro E C, Meyerhof W E, McGuire J H 1994 Adv. At. Mol. Opt. Phys. 34 249
[24] McGuire J H, Stolterfoht N P, Simony R 1981 Phys. Rev. A 24 97
[25] [26] [27] Bernard S, Elisabeth W R, Roger V R 1982 Nucl. Instrum. Meth. 194 437
[28] [29] Sant' Anna M M, Melo W S, Santos A C F, Sigaud G M, Montenegro E C 1995 Nucl. Instrum. Meth. B 99 46
[30] [31] Sigaud G M, Jora' s F S, Santos A C F, Montenegro E C, Sant' Anna M M, Melo W S 1997 Nucl. Instrum. Meth. B 132 312
[32] [33] Brendle B, Gayet R, Rozet J P, Wohrer K 1985 Phys. Rev. Lett. 54 2007
[34] Wohrer K, Chetioui A, Rozet J P, Jolly A, Fernandez F, Stephan C, Brendle B, Gayet R 1986 J. Phys. B 19 1997
[35] [36] [37] Xu X Y, Montenegro E C, Anholt R, Danzmann K, Meyerhof W E, Schlachter A S, Rude B S, McDonald R J 1988 Phys. Rev. A 38 1848
[38] [39] Chung H K, Lee R W, Chen M H 2007 High Ener. Dens. Phys. 3 342
[40] Chabot M, Wohrer K, Chetioui A, Rozet J P, Touati A, Vernhet D, Politis M F, Stephan C, Grandin J P, Macias A, Martin F, Riera A, Sanz J L, Gayet R 1994 J. Phys. B 27 111
[41] [42] Walters H R J 1975 J. Phys. B 8 54
[43] [44] Woitke O, Za' vodszky P A, Ferguson S M, Houck J H, Tanis J A 1998 Phys. Rev. A 57 2692
[45] [46] McGuire J H 1987 Phys. Rev. A 36 1114
[47] [48] [49] Grande P L, Schiwietz G, Sigaud G M, Montenegro E C 1996 Phys. Rev. A 54 2983
[50] [51] Voitkiv A E, Sigaud G M, Montenegro E C 1999 Phys. Rev. A 59 2794
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