Bismuth-loaded plastic scintillators for gamma-ray spectroscopy
Lawrence Livermore National Laboratory - Livermore, CA 94550, USA
Accepted: 12 December 2011
Polyvinylcarbazole polymer scintillators with high loading of a bismuth organometallic exhibit good light yields, and are found to be capable of gamma-ray spectroscopy. When activated by a standard fluor, diphenylanthracene, a bismuth-loaded polymer produces ∼12000 photons/MeV, exhibits an emission maximum at 420 nm, a ∼15 ns decay, and energy resolution of 9% at 662 keV is measured. The same bismuth-loaded polymer doped with an iridium complex fluor has an emission maximum of 500 nm, a decay time of 1.2 μs, a light yield of ∼30000 photons/MeV, and energy resolution better than 7% FWHM at 662 keV.
PACS: 29.40.Mc – Scintillation detectors / 29.30.Kv – X- and γ-ray spectroscopy / 78.55.Kz – Solid organic materials
© EPLA, 2012