Bulletin of the American Physical Society
2016 Fall Meeting of the APS Division of Nuclear Physics
Volume 61, Number 13
Thursday–Sunday, October 13–16, 2016; Vancouver, BC, Canada
Session EA: CEU Poster Session - 2:00 - 3:48PM
Friday, October 14, 2016
Room: Grand Ballroom
Abstract ID: BAPS.2016.DNP.EA.112
Abstract: EA.00112 : Determination of the Thickness of the Back Dead-Layer of GRETINA Crystals via Comparisons of Measured Photopeak Efficiencies with GEANT4 Simulations*
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L. R. Jarvis
C. G. Stine
L. A. Riley
Measurements of the photopeak efficiency of the GRETINA array up to 3.5 MeV made at the National Superconducting Cyclotron Laboratory with 152Eu and 56Co sources were compared with GEANT 4 simulations. We developed a method of determining the average thickness of the back dead layers of the GRETINA crystals by considering the partial photopeak efficiencies of events including gamma-ray interactions in the back slice of the crystals. The impact of dead-layer thicknesses on the accuracy of simulated photopeak efficiencies and the ratio of photopeak counts measured in the two GRETINA crystal types is discussed.
*This work was supported by the National Science Foundation under Grant Nos. PHY-1303480 and PHY-1102511 and by the US Department of Energy under grant No. DE-AC02-05CH11231.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2016.DNP.EA.112
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