V. N. Solovov, V. A. Belov, D. Yu. Akimov, H. M. Araújo, E. J. Barnes, A. A. Burenkov, V. Chepel, A. Currie, L. DeViveiros, B. Edwards, C. Ghag, A. Hollingsworth, M. Horn, G. E. Kalmus, A. S. Kobyakin, A. G. Kovalenko, V. N. Lebedenko, A. Lindote, M. I. Lopes, R. Lüscher, P. Majewski, A. St J. Murphy, F. Neves, S. M. Paling, J. Pinto da Cunha, R. Preece, J. J. Quenby, L. Reichhart, P. R. Scovell, C. Silva, N. J. T. Smith, P. F. Smith, V. N. Stekhanov, T. J. Sumner, C. Thorne, R. J. Walker
We studied the application of statistical reconstruction algorithms, namely
maximum likelihood and least squares methods, to the problem of event
reconstruction in a dual phase liquid xenon detector. An iterative method was
developed for in-situ reconstruction of the PMT light response functions from
calibration data taken with an uncollimated gamma-ray source. Using the
techniques described, the performance of the ZEPLIN-III dark matter detector
was studied for 122 keV gamma-rays. For the inner part of the detector (R<100
mm), spatial resolutions of 13 mm and 1.6 mm FWHM were measured in the
horizontal plane for primary and secondary scintillation, respectively. An
energy resolution of 8.1% FWHM was achieved at that energy. The possibility of
using this technique for improving performance and reducing cost of
scintillation cameras for medical applications is currently under study.
View original:
http://arxiv.org/abs/1112.1481
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