3-D position sensitive CdZnTe gamma-ray spectrometers
Two 3-D position-sensitive room temperature semiconductor γ-ray spectrometers have been built using 1 cm 3 cubic CdZnTe crystals. The lateral coordinates of γ-ray interaction are obtained from the location of the 11( x)×11( y) pixellated anodes and the depth ( z) is obtained from the ratio of the si...
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| Published in: | Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 422; no. 1; pp. 173 - 178 |
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| Main Authors: | , , , , , |
| Format: | Journal Article |
| Language: | English |
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Elsevier B.V
1999
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| Abstract | Two 3-D position-sensitive room temperature semiconductor γ-ray spectrometers have been built using 1
cm
3 cubic CdZnTe crystals. The lateral coordinates of γ-ray interaction are obtained from the location of the 11(
x)×11(
y) pixellated anodes and the depth (
z) is obtained from the ratio of the signals coming from the cathode and the anode. Energy spectra from 662
keV incident γ-rays have been collected from each of the
11
(x)×11
(y)×20
(z)
voxels in both of the CdZnTe devices. After corrections for electron trapping, the difference of weighting potentials in 3-D, and for the gain variation of the readout circuitry, energy resolutions of 1.70% (11.3
keV) FWHM and 1.84% (12.2
keV) FWHM were obtained at 662
keV γ-ray energy on the first and second detectors, respectively, from the whole bulk for single-pixel events. Possible improvements in the detector performance are discussed. |
|---|---|
| AbstractList | Two 3-D position-sensitive room temperature semiconductor γ-ray spectrometers have been built using 1
cm
3 cubic CdZnTe crystals. The lateral coordinates of γ-ray interaction are obtained from the location of the 11(
x)×11(
y) pixellated anodes and the depth (
z) is obtained from the ratio of the signals coming from the cathode and the anode. Energy spectra from 662
keV incident γ-rays have been collected from each of the
11
(x)×11
(y)×20
(z)
voxels in both of the CdZnTe devices. After corrections for electron trapping, the difference of weighting potentials in 3-D, and for the gain variation of the readout circuitry, energy resolutions of 1.70% (11.3
keV) FWHM and 1.84% (12.2
keV) FWHM were obtained at 662
keV γ-ray energy on the first and second detectors, respectively, from the whole bulk for single-pixel events. Possible improvements in the detector performance are discussed. |
| Author | Wehe, D.K. Berry, J. Knoll, G.F. Li, W. He, Z. Stahle, C.M. |
| Author_xml | – sequence: 1 givenname: Z. surname: He fullname: He, Z. organization: Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI 48109, USA – sequence: 2 givenname: W. surname: Li fullname: Li, W. organization: Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI 48109, USA – sequence: 3 givenname: G.F. surname: Knoll fullname: Knoll, G.F. organization: Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI 48109, USA – sequence: 4 givenname: D.K. surname: Wehe fullname: Wehe, D.K. organization: Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI 48109, USA – sequence: 5 givenname: J. surname: Berry fullname: Berry, J. organization: Department of Nuclear Engineering and Radiological Sciences, University of Michigan, Ann Arbor, MI 48109, USA – sequence: 6 givenname: C.M. surname: Stahle fullname: Stahle, C.M. organization: Orbital Sciences Corp./NASA Goddard Space Flight Center, Code 553, Greenbelt, MD 20771, USA |
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| References | eV Products, 375 Saxonburg Boulevard, Saxonburg, PA 16056, USA. Amptek Inc., 6 De Angelo Drive, Bedford, MA 01730, USA. He (BIB3) 1996; 380 Stahle (BIB5) 1997; 3115 He (BIB4) 1997; 388 Doty (BIB1) 1994; 353 IDE AS, Veritasveien 9, N-1322 Hovik, Norway. GEANT3, CERN, Geneva, Switzerland. He (BIB6) 1995; 365 Barrett (BIB2) 1995; 75 Barrett (10.1016/S0168-9002(98)00950-4_BIB2) 1995; 75 He (10.1016/S0168-9002(98)00950-4_BIB3) 1996; 380 He (10.1016/S0168-9002(98)00950-4_BIB4) 1997; 388 10.1016/S0168-9002(98)00950-4_BIB9 10.1016/S0168-9002(98)00950-4_BIB8 10.1016/S0168-9002(98)00950-4_BIB7 Stahle (10.1016/S0168-9002(98)00950-4_BIB5) 1997; 3115 10.1016/S0168-9002(98)00950-4_BIB10 Doty (10.1016/S0168-9002(98)00950-4_BIB1) 1994; 353 He (10.1016/S0168-9002(98)00950-4_BIB6) 1995; 365 |
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| Snippet | Two 3-D position-sensitive room temperature semiconductor γ-ray spectrometers have been built using 1
cm
3 cubic CdZnTe crystals. The lateral coordinates of... |
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| Title | 3-D position sensitive CdZnTe gamma-ray spectrometers |
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