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Extraction of mean free path of charge carriers in CdZnTe crystals from measured full-energy peaks

被引：18
作者：
Miyajima, S
Sakuragi, H
Matsumoto, M
机构：
[1] Osaka Univ, Grad Sch Med, Course Hlth Sci, Suita, Osaka 5650871, Japan
[2] Osaka Univ, Fac Med, Sch Allied Hlth Sci, Suita, Osaka 5650871, Japan
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2002年 / 485卷 / 03期
关键词：
CdZnTe detector; tailing; mean free path; Hecht equation; X-ray spectrometry;
D O I：
10.1016/S0168-9002(01)02126-X
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The mean free path of electrons (lambda(e)) and holes in a CdZnTe crystal were extracted from measured gamma-ray spectra. First, distortion due to Gaussian broadening was unfolded from full-energy peaks in the gamma-ray spectra. As a result, only tailing was left in the unfolded peaks. Second, lambda(e) and lambda(h), were determined by fitting tailing of full-energy peaks in calculated response functions to that in the unfolded gamma-ray spectra. The response functions were calculated using EGS4 with the Hecht equation coded. 2.5 x 10(2) cm for lambda(e) and 5.0 x 10(-2) cm for lambda(h) were obtained in an electric field of 2500 V/cm: the mutau products were found to be 1.0 x 10(-1) cm(2)/V for electrons and 2.0 x 10(-5) cm(2)/V for holes. This method is reasonable to obtain lambda(e) and lambda(h), which are necessary to correct the distortion caused by tailing in X-ray spectra. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：533 / 538
页数：6
相关论文
共 32 条
[21]   Performance of a coaxial geometry Cd1-xZnxTe detector [J].
Lund, JC ;
Olsen, RW ;
James, RB ;
VanScyoc, JM ;
Eissler, EE ;
Blakeley, MM ;
Glick, JB ;
Johnson, CJ .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1996, 377 (2-3) :479-483
[22]   SIMULATION OF HGI2 SEMICONDUCTOR-DETECTORS BY A MONTE-CARLO METHOD [J].
MANFREDOTTI, C ;
NASTASI, U .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1984, 225 (01) :138-144
[23]   Use of a Monte-Carlo code to determine in high Z semi-conductor CdTe and CZT, both carriers lifetimes and mobilities [J].
Muller, E ;
Jung, M ;
Fougeres, P ;
Hage-Ali, M ;
Siffert, P .
SEMICONDUCTORS FOR ROOM-TEMPERATURE RADIATION DETECTOR APPLICATIONS II, 1997, 487 :301-308
[24]  
NAMITO Y, 2000, 20004 KEK, P45122
[25]  
Nelson W.R., 1985, Tech. Rep. SLAC-265
[26]   MONTE-CARLO SIMULATION OF GAMMA-RAY SPECTRA FROM SEMICONDUCTOR-DETECTORS [J].
OLSCHNER, F ;
LUND, JC ;
STERN, I .
IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 1989, 36 (01) :1176-1179
[27]   STRIPPING OF X-RAY BREMSSTRAHLUNG SPECTRA UP TO 300-KVP ON A DESK TYPE COMPUTER [J].
SEELENTAG, WW ;
PANZER, W .
PHYSICS IN MEDICINE AND BIOLOGY, 1979, 24 (04) :767-780
[28]   Novel concepts in X-ray and gamma-ray detection using compound semiconductors [J].
Squillante, MR ;
Entine, G .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1996, 380 (1-2) :160-164
[29]   Photocurrent mapping as a probe of transport properties and electric field distributions in cadmium zinc telluride detectors [J].
Toney, JE ;
Brunett, BA ;
Schlesinger, TE ;
James, RB .
IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 1997, 44 (04) :1684-1691
[30]   Uniformity of Cd1-xZnxTe grown by high-pressure Bridgman [J].
Toney, JE ;
Brunett, BA ;
Schlesinger, TE ;
VanScyoc, JM ;
James, RB ;
Schieber, M ;
Goorsky, M ;
Yoon, H ;
Eissler, E ;
Johnson, C .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1996, 380 (1-2) :132-135
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