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

Volume

4

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

2344

Lastpage

2347

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2001 IEEE

Conference_Location

San Diego, CA

ISSN

1082-3654

Print_ISBN

0-7803-7324-3

Type

conf

DOI

10.1109/NSSMIC.2001.1009292

Filename

1009292