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Shin, Tae Joo
UNIST Synchrotron Radiation Research Laboratory
Research Interests
  • Synchrotron Radiation Application Researches

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Position resolution and energy spectra from a two-dimensional gas proportional detector in the region of the krypton K-edge

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Title
Position resolution and energy spectra from a two-dimensional gas proportional detector in the region of the krypton K-edge
Author
Shin, Tae JooDierker, SBSmith, GC
Issue Date
2005-09
Publisher
ELSEVIER SCIENCE BV
Citation
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, v.550, no.1-2, pp.292 - 304
Abstract
Results are presented of the position resolution and energy spectra from a two-dimensional gas proportional detector in the region of the krypton K-edge of 14.326 keV. Measurements were made with a gas mixture of Kr/10%CO2 and the position resolution was fit by a simple model based on the photoelectron and Auger electron range. In the energy region below the K-edge, X-rays interact primarily in the L-shell, yielding an energetic photoelectron that limits position resolution to no better than several hundred mu m. For X-rays with energy just above the K-edge, position resolution in the range of 90 mu m FWHM was achieved using the technique of escape peak gating. We found broad low-level wings forming about 31% of the total area in the position spectrum above the K-edge, indicating that the L-shell interactions are included (and inseparable) in the gating technique of photopeak events within this energy range. Furthermore, the shape of the position spectrum was well explained when the energy dependence of sigma(L)/(sigma(K) + sigma(L)) was considered above the K-edge. (c) 2005 Elsevier B.V. All rights reserved
URI
https://scholarworks.unist.ac.kr/handle/201301/16626
URL
http://www.sciencedirect.com/science/article/pii/S0168900205012659
DOI
10.1016/j.nima.2005.05.050
ISSN
0168-9002
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