期刊
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
卷 51, 期 3, 页码 1289-1296出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNS.2004.829375
关键词
energy resolution; gamma ray spectroscopy; LaBr3 : Ce3+; nonproportionality; scintillator
Pulse height spectra of various sources covering X-ray and gamma ray energies from 10 keV to 6.1 MeV were measured by the first large circle divide19 x 19 mm(3) LaBr3 : 0.5% Ce3+ scintillator. The spectra are compared with that recorded with a same sized NaI:Tl+ scintillator. Excellent energy resolution pulse height spectra are obtained showing that the scaling up from a small (approximate to3 x 3 x 10 mm(3)) sized LaBr3 : Ce3+ scintillator studied initially up to an approximate to 6 cm(3) scintillator does not lead to much deterioration of resolution and light output. Special attention is devoted to the nonproportionality in the response of LaBr3 : Ce3+ and related energy resolution. At high energy LaBr3 : Ce3+ is far superior above NaI:Tl+ in terms of energy resolution and scintillation speed. At energies below 100 keV, NaI : Tl+ shows a better energy resolution.
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