Title :
RbGd2Br7:Ce scintillators for gamma-ray and thermal neutron detection
Author :
Shah, Kanai S. ; Cirignano, Leonard ; Grazioso, Ronald ; Klugerman, Misha ; Bennett, Paul R. ; Gupta, Tapan K. ; Moses, William W. ; Weber, Marvin J. ; Derenzo, Stephen E.
Author_Institution :
Radiat. Monitoring Devices Inc., Watertown, MA, USA
fDate :
8/1/2002 12:00:00 AM
Abstract :
In this paper, we report on gamma-ray and thermal neutron detection with RbGd2Br7:Ce scintillators. RbGd2Br7:Ce (RGB) is a new scintillator material that shows high light output (56000 photons/MeV) and has a fast principal decay constant (45 ns) when doped with 10% Ce. These properties make RGB an attractive scintillator for γ-ray detection. Also, due to the presence of Gd as a constituent, RGB has a high cross-section for thermal neutron absorption and can achieve close to 100% stopping efficiency with 0.5-mm-thick RGB crystals. Crystals of RGB with three different Cc concentrations (0.1, 5, and 10%) have been grown. Their basic scintillation properties such as light output, decay time, and emission spectrum have been measured. In addition, high-efficiency thermal neutron detection has been confirmed in our studies.
Keywords :
gamma-ray detection; neutron detection; rubidium compounds; solid scintillation detectors; 0.5 mm; Cc concentrations; RbGd2Br7:Ce; RbGd2Br7:Ce detector; decay constant; decay time; emission spectrum; gamma-ray detection; light output; thermal neutron detection; Absorption; Crystalline materials; Crystals; Gamma ray detection; Gamma ray detectors; Geologic measurements; Linearity; Neutrons; Solid scintillation detectors; Spectroscopy;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2002.801511
