Title :
Bismuth iodide (III) crystals for nuclear radiation detectors
Author :
Matsumoto, M. ; Hitomi, K. ; Shoji, T. ; Hiratate, Y.
Author_Institution :
Dept. of Electron., Tohoku Inst. of Technol., Sendai, Japan
fDate :
6/23/1905 12:00:00 AM
Abstract :
Bismuth tri-iodide (BiI3) is an attractive material for room temperature radiation detectors because of its wide bandgap energy and high photon stopping power. In this study, BiI3 crystals have been grown by the vertical Bridgman technique using commercially available powder. The grown crystals have been characterized in terms of their structural properties and stoichiometry. Room temperature radiation detectors have been fabricated from the crystals and tested by measuring their leakage currents and spectroscopic responses. A clear peak corresponding to 5.48 MeV α-particles (241Am) was recorded with a BiI3 detector 82 μm thick with 0.8 mm2 palladium electrodes. The energy resolution of the 5.48 MeV peak was measured to be 2.2 MeV FWHM
Keywords :
X-ray diffraction; X-ray fluorescence analysis; alpha-particle detection; bismuth compounds; crystal growth from melt; leakage currents; semiconductor counters; stoichiometry; α-particles; 5.48 MeV; 82 micron; BiI3; BiI3 detector; Pd; Pd electrodes; X-ray diffraction; X-ray fluorescence; energy resolution; leakage currents; room temperature detectors; stoichiometry; vertical Bridgman technique; Bismuth; Crystalline materials; Current measurement; Leakage current; Photonic band gap; Photonic crystals; Powders; Radiation detectors; Temperature; Testing;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2001 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-7324-3
DOI :
10.1109/NSSMIC.2001.1009292
