Abstract
Sm:SrBr2 crystals with various Sm concentrations were prepared by the vertical Bridgman method, and the detector properties including emission spectra, decay time, and pulse height were investigated. The samples exhibit a broad emission band peaking at 690 nm and decay time of about 10 μs, and the emission is attributable to the allowed 5d-4f luminescence of Sm2+. The pulse height analyses under 137Cs γ-rays (662 keV) demonstrate that the light yields of the 0.03, 0.1, 0.3, and 1% Sm:SrBr2 are 31000, 32000, 23000 and 13000 photons/MeV, respectively.
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