Study of the background in the experiments of inner-shell ionization of atoms by positron impact

AN Zhu; LIU Man-Tian; ZHU Jing-Jun

Chinese Physics C> 2008, Vol. 32> Issue(S2) : 270-273

Study of the background in the experiments of inner-shell ionization of atoms by positron impact

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Abstract：
One of main difficulties in the experiments of inner-shell ionization of atoms by positron impact near threshold energy region is the relatively high low-energy background, which is caused by the deposited part of energy in semi-conductor X-ray detectors of 0.511 MeV γ rays that are produced by positron annihilations in targets and target chamber. In this paper, by using the Monte Carlo method, we simulated the backgrounds for the X-ray detectors with the sensitive layer thickness of 0.3 mm and 3 mm in the case of 0.511 MeV γ rays impacting vertically on a Ti plate of 0.2 mm in thickness, and compared the simulation results with the experimental observations of the other research group and our own. Moreover, we also simulated the backgrounds for a simplified experimental setup in the case of 20 keV positrons impacting vertically on a thick Ti target and observed that the backgrounds for the X-ray detectors with the sensitive layer thickness of 0.3 mm and 3 mm, are very similar.

References

[1]

. Nagashima Y, Saito F, Itoh Y, Goto A, Hyodo T. Phys.Rev. Lett., 2004, 92: 223201-1-42. Powell C J. Innershell ionization cross sections. In: MarkT D, Dunn G H ed. Electron Impact Ionization, New York:Springer, 1985. 198-2313. Segui S, Dingfelder M, Salvat F. Phys. Rev. A, 2003, 67:062710-1-124. Surko C M, Gribakin G F, Buckman S J. J. Phys. B, 2005,38: R57-R1265. Powell C J. Rev. Mod. Phys., 1976, 48: 33-476. Hansen H, Weigmann H, Flammersfeld A. Nucl. Phys.,1964, 58: 241-2537. Hansen H, Flammersfeld A. Nucl. Phys., 1966, 79: 135-1448. Seif el Nasr S A H, Berenyi D, Bibok G. Z. Phys., 1974,271: 207-2109. Ito S, Shimizu S, Kawaratani T, Kubota K. Phys. Rev. A,1980, 22: 407-41210. Schultz P J, Campbell J L. Phys. Lett. A, 1985, 112: 316-31811. Lennard W N, Schultz P J, Massoumi G R, Logan L R.Phys. Rev. Lett., 1988, 61: 2428-243012. Ebel F, Faust W, Hahn C, Rückert M, Schneider H, SingeA, Tobehn I. Phys. Lett. A, 1989, 140: 114-11613. Schneider H, Tobehn I, Hippler R. Phys. Lett. A, 1991,156: 303-30614. Schneider H, Tobehn I, Ebel F, Hippler R. Phys. Rev. Lett.,1993, 71: 2707-270915. WEI Long, CHEN Hong-Min, YU Run-Sheng, WANGBao-Yi, ZHANG Tian-Bao, YU Wei-Zhong, HE Yuan-Jin,WANG Tian-Min. Rev. Nucl. Phys., 2000, 17: 117-120(in Chinese)16. HAN Rong-Dian, YE Bang-Jiao, WENG Hui-Min, ZHOUXian-Yi, FAN Yang-Mei. Progress in Physics, 1999, 19:305-330 (in Chinese)17. Nagashima Y, Shigeta W, Hyodo T, Iwaki M. Radiat. Phys.Chem., 2007, 76: 465-46818. Nagashima Y, Saito F, Itoh Y, Goto A, Hyodo T. MaterialsScience Forum, 2004, 445-446: 440-44219. Llovet X, Fernández-Varea J M, Sempau J, Salvat F. Surf.Interface Anal., 2005, 37: 1054-1058

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[18]	Pei Guoxi , Xie Jialin , Zhou Shu , Sun Songlan . Optimization of the BEPC Positron Source. Chinese Physics C, 1990, 14(S2): 125-134.
[19]	Guo Yingxiang , Sun Xiangfu , Luo Ybdao , Lei Xiangguo , Sun Xijun , Xu Xiaoji , Zhao Zhizheng , Wang Jicheng , Yu Jianfang , Wen Shuxian , Li Shenggang , Weng Peikun , Hua Pengfei , Li Guangsheng , Yuan Guanjun , Zhu Lihua , Zhang Lankuan , Yu Panshui , Yan Chunxiang . Experiments with Joined in-beam γ Equipment. Chinese Physics C, 1990, 14(S4): 391-397.
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AN Zhu, LIU Man-Tian and ZHU Jing-Jun. Study of the background in the experiments of inner-shell ionization of atoms by positron impact[J]. Chinese Physics C, 2008, 32(S2): 270-273.

AN Zhu, LIU Man-Tian and ZHU Jing-Jun. Study of the background in the experiments of inner-shell ionization of atoms by positron impact[J]. Chinese Physics C, 2008, 32(S2): 270-273. shu

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Received: 2008-07-17
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Study of the background in the experiments of inner-shell ionization of atoms by positron impact

Corresponding author: AN Zhu,

Received Date: 2008-07-17

Accepted Date: 1900-01-01

Available Online: 2008-01-03

Abstract: One of main difficulties in the experiments of inner-shell ionization of atoms by positron impact near threshold energy region is the relatively high low-energy background, which is caused by the deposited part of energy in semi-conductor X-ray detectors of 0.511 MeV γ rays that are produced by positron annihilations in targets and target chamber. In this paper, by using the Monte Carlo method, we simulated the backgrounds for the X-ray detectors with the sensitive layer thickness of 0.3 mm and 3 mm in the case of 0.511 MeV γ rays impacting vertically on a Ti plate of 0.2 mm in thickness, and compared the simulation results with the experimental observations of the other research group and our own. Moreover, we also simulated the backgrounds for a simplified experimental setup in the case of 20 keV positrons impacting vertically on a thick Ti target and observed that the backgrounds for the X-ray detectors with the sensitive layer thickness of 0.3 mm and 3 mm, are very similar.

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Study of the background in the experiments of inner-shell ionization of atoms by positron impact

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