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

Abstract
HTML
Reference
Related

PDF

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

[1]	Bao-Dong Sun , Yu-Bing Dong . ρ meson impact parameter distributions. Chinese Physics C, 2018, 42(6): 063104. doi: 10.1088/1674-1137/42/6/063104
[2]	Cen-Xi Yuan . Impact of off-diagonal cross-shell interaction on¹⁴C. Chinese Physics C, 2017, 41(10): 104102. doi: 10.1088/1674-1137/41/10/104102
[3]	HUANG Xi-Ru , CAO Ping , GAO Li-Wei , ZHENG Jia-Jun . A data readout approach for physics experiments. Chinese Physics C, 2015, 39(7): 076102. doi: 10.1088/1674-1137/39/7/076102
[4]	SU Jian , ZENG Zhi , MA Hao , YUE Qian , CHENG Jian-Ping , CHANG Jian-Ping , CHEN Nan , CHEN Ning , CHEN Qing-Hao , CHEN Yun-Hua , CHUANG Yo-Chun , DENG Zhi , DU Qiang , GONG Hui , HAO Xi-Qing , HE Qing-Ju , HUANG Han-Xiong , HUANG Teng-Rui , JIANG Hao , KANG Ke-Jun , LI Hau-Bin , et al . Study of the material photon and electron background and the liquid argon detector veto efficiency of the CDEX-10 experiment. Chinese Physics C, 2015, 39(3): 036001. doi: 10.1088/1674-1137/39/3/036001
[5]	PING Rong-Gang . An exclusive event generator for e⁺e^- scan experiments. Chinese Physics C, 2014, 38(8): 083001. doi: 10.1088/1674-1137/38/8/083001
[6]	LONG Ji-Dong , YANG Zhen , DONG Pan , SHI Jin-Shui . Conceptual design of an intense positron source based on an LIA. Chinese Physics C, 2012, 36(4): 367-370. doi: 10.1088/1674-1137/36/4/013
[7]	TIAN Jian-Min , XU Mei-Hang , ZHAO Zhong-Liang , CHEN Chang , RUAN Xiang-Dong , CHEN Yuan-Bo , XU Tao-Guang , LU Shuang-Tong . Improved design and construction of an ionization chamber for the CSNS beam loss monitor (BLM). Chinese Physics C, 2012, 36(4): 329-333. doi: 10.1088/1674-1137/36/4/006
[8]	LI Dao-Wu , LIU Jun-Hui , ZHANG Zhi-Ming , WANG Bao-Yi , ZHANG Tian-Bao , WEI Long . A compact positron annihilation lifetime spectrometer. Chinese Physics C, 2011, 35(1): 100-103. doi: 10.1088/1674-1137/35/1/021
[9]	MO Xiao-Hu , ZHANG Jian-Yong , ZHANG Qing-Jiang , Achasov Mikhail , CAI Xiao , FU Cheng-Dong , Harris Fred , LIU Qian , Muchnoi Nikolay , QIN Qing , QU Hua-Min , WANG Yi-Fang , XU Jin-Qiang , ZHANG Tian-Bao . Study of radiation background at the north crossing point of the BEPCⅡ in collision mode. Chinese Physics C, 2011, 35(7): 642-655. doi: 10.1088/1674-1137/35/7/009
[10]	LI Xiang , ZHENG Shu-Xin . Simulation and experiments for the Q_ext of a cavity beam position monitor. Chinese Physics C, 2010, 34(3): 405-408. doi: 10.1088/1674-1137/34/3/020
[11]	LIANG Li-Zhen , HU Chun-Dong , XIE Yuan-Lai , XIE Ya-Hong , NBI-Team . Modeling process of the neutral beam re-ionization loss. Chinese Physics C, 2010, 34(7): 972-977. doi: 10.1088/1674-1137/34/7/008
[12]	WANG Wen-Xin , ZHANG Yi , WANG Ji-Jin , HU Bi-Tao . Study on spatial resolution of micromegas as a neutron detector under condition of high neutron flux and γ ray background. Chinese Physics C, 2009, 33(2): 110-113. doi: 10.1088/1674-1137/33/2/007
[13]	LIU Chu-Yu , WANG Fang , WANG Er-Dong , QUAN Sheng-Wen , HAO Jian-Kui , LU Xiang-Yang , ZHANG Bao-Cheng , ZHAO Kui . Impact on the magnetic compressor due to CSR. Chinese Physics C, 2008, 32(8): 665-667. doi: 10.1088/1674-1137/32/8/016
[14]	WANG Fu-Rong , MENG Xiang-Fei , LUO Yan-An , PAN Feng . Projected SD-pair shell model study for even-even Xe isotopes. Chinese Physics C, 2008, 32(S2): 109-111.
[15]	HUA Zheng-Dong , XU Xun-Jiang , WANG Jian-Hua , LIU Shu-Dong , LI Jian-Ping . Study of the energy response of high pressure ionization chamber for high energy gamma-ray. Chinese Physics C, 2008, 32(5): 370-372. doi: 10.1088/1674-1137/32/5/008
[16]	Guo Zhiyuan , Qin Qing , Zhang Chuang . A Study on Bunch Lengthening in the Beijing Electron-Positron Collider. Chinese Physics C, 1996, 20(S4): 403-410.
[17]	He Yuanjin , Xin Mingrui , Zhang Tianbao . Measurement of Characteristic Positron Annihilation Lifetime in HgCdTe. Chinese Physics C, 1994, 18(S3): 315-319.
[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.
[20]	Xiong Liangyue . A Phenomenological Model for Positron Trapping at Dislocations. Chinese Physics C, 1988, 12(S1): 9-18.

Access

Get Citation

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

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

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

Article Metric

Article Views(2922)
PDF Downloads(574)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
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.

HTML

Reference (1)

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

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article