Measured and simulated performance of Compton-suppressed TIGRESS HPGe clover detectors

M. A. Schumaker*, G. Hackman, C. J. Pearson, C. E. Svensson, C. Andreoiu, A. Andreyev, R. A. E. Austin, G. C. Ball, D. Bandyopadhyay, A. J. Boston, R. S. Chakrawarthy, R. Churchman, T. E. Drake, P. Finlay, P. E. Garrett, G. F. Grinyer, B. Hyland, B. Jones, R. Maharaj, A. C. MortonA. A. Phillips, F. Sarazin, H. C. Scraggs, M. B. Smith, J. J. Valiente-Dobon, J. C. Waddington, L. M. Watters

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Tests of the performance of a 32-fold segmented HPGe clover detector coupled to a 20-fold segmented Compton-suppression shield, which form a prototype element of the TRIUMF-ISAC Gamma-Ray Escape-Suppressed Spectrometer (TIGRESS), have been made. Peak-to-total ratios and relative efficiencies have been measured for a variety of gamma-ray energies. These measurements were used to validate a GEANT4 simulation of the TIGRESS detectors, which was then used to create a simulation of the full 12-delector array. Predictions of the expected performance of TIGRESS are presented. These predictions indicate that TIGRESS will be capable, for single 1 MeV gamma rays, of absolute detection efficiencies of 17% and 9.4%, and peak-to-total ratios of 54% and 61% for the "high-efficiency" and "optimized peak-to-total" configurations of the array, respectively. (c) 2006 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)437-445
Number of pages9
JournalNuclear instruments & methods in physics research section a-Accelerators spectrometers detectors and associated equipment
Issue number3
Publication statusPublished - 21 Jan 2007


  • segmented HPGe detectors
  • Compton suppression

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