An Optimized Design of Single-Channel Beta-Gamma Coincidence Phoswich Detector by Geant4 Monte Carlo Simulations | Zendy

Weihua Zhang | Zendy; Pawel Mekarski | Zendy; M. Bean | Zendy; Yi Jing | Zendy; Kurt Ungar | Zendy

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An Optimized Design of Single-Channel Beta-Gamma Coincidence Phoswich Detector by Geant4 Monte Carlo Simulations

Author(s) -

Weihua Zhang,

Pawel Mekarski,

M. Bean,

Yi Jing,

Kurt Ungar

Publication year - 2011

Publication title -

science and technology of nuclear installations

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.417

H-Index - 24

eISSN - 1687-6083

pISSN - 1687-6075

DOI - 10.1155/2011/741396

Subject(s) - photomultiplier , detector , coincidence , optics , xenon , monte carlo method , physics , scintillation , scintillator , nuclear physics , medicine , statistics , alternative medicine , mathematics , pathology

An optimized single-channel phoswich well detector design has been proposed and assessed in order to improve beta-gamma coincidence measurement sensitivity of xenon radioisotopes. This newly designed phoswich well detector consists of a plastic beta counting cell (BC404) embedded in a CsI(Tl) crystal coupled to a photomultiplier tube. The BC404 is configured in a cylindrical pipe shape to minimise light collection deterioration. The CsI(Tl) crystal consists of a rectangular part and a semicylindrical scintillation part as a light reflector to increase light gathering. Compared with a PhosWatch detector, the final optimized detector geometry showed 15% improvement in the energy resolution of a 131mXe 129.4 keV conversion electron peak. The predicted beta-gamma coincidence efficiencies of xenon radioisotopes have also been improved accordingly

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