A Compton-suppressed phoswich detector for radioxenon measurements

Author

Farsoni, A.T. ; Alemayehu, B. ; Alhawsawi, A.

Author_Institution

Dept. of Nucl. Eng. & Radiat. Health Phys., Oregon State Univ., Corvallis, OR, USA

fYear

2011

fDate

23-29 Oct. 2011

Firstpage

2208

Lastpage

2213

Abstract

A phoswich detector with Compton suppression capability has been developed and assembled for measuring low concentration of xenon radioisotopes in the atmosphere. The phoswich detector has been designed with three scintillation layers. Beta-gamma coincidence events from radioxenon isotopes are identified when a coincidence energy absorption is detected from the first (BC-400) and second (CsI(Tl) crystal) scintillation layers. To identify and reject scattered photons from CsI(Tl) crystal, the crystal is surrounded by a BGO scintillation layer. In this paper, detector assembly steps and our recent measurements with lab sources and radioxenon isotopes produced in the Oregon State University´s TRIGA reactor will be discussed.

Keywords

Compton effect; caesium compounds; radioisotopes; solid scintillation detectors; xenon; BC-400; BGO scintillation layer; Compton suppression capability; Compton-suppressed phoswich detector; CsI(TI) crystal; Oregon State University; TRIGA reactor; beta-gamma coincidence events; coincidence energy absorption; detector assembly steps; first scintillation layer; lab sources; scattered photons; scintillation layers; second scintillation layer; xenon radioisotope measurements; Coatings; Energy resolution; Lead; Nitrogen;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2011 IEEE

Conference_Location

Valencia

ISSN

1082-3654

Print_ISBN

978-1-4673-0118-3

Type

conf

DOI

10.1109/NSSMIC.2011.6154451

Filename

6154451