Title :
Study on a phoswich detector consisting of Li-composed crystal scintillator and BGO for neutron measurement
Author :
Takahashi, H. ; Yonetani, M. ; Matsuoka, M. ; Mizuno, T. ; Fukazawa, Y. ; Yanagida, T. ; Yokota, Y. ; Yoshikawa, A. ; Kawaguchi, N. ; Ishizu, S. ; Fukuda, K. ; Suyama, T.
Author_Institution :
Hiroshima Univ., Higashi-Hiroshima, Japan
fDate :
Oct. 24 2009-Nov. 1 2009
Abstract :
For high-sensitivity neutron measurement, we developed a phoswich detector consisting of LiYF4 (Ce 1%) and BGO crystals. Light outputs of LiYF4 excited from ¿-ray (simulating neutron excitation) have the faster decay-time constant ¿~50 ns, compared with that from the shielding BGO crystal (¿~300 ns), and these waveforms output from a preamplifier are clearly distinguished each other. When the waveforms with the faster rise-time were selected, the spectrum was obtained with only the peak of 5.49 MeV ¿-ray from 241Am detected at the neutron-sensitive LiYF4 scintillator.
Keywords :
neutron detection; solid scintillation detectors; Li-composed crystal scintillator; LiYF4 crystal; faster decay-time constant; high-sensitivity neutron measurement; light outputs; neutron-sensitive LiYF4 scintillator; phoswich detector; preamplifier; rise-time; shielding BGO crystal; simulating neutron excitation; waveforms output; Clocks; Extraterrestrial measurements; Gamma ray detection; Gamma ray detectors; Neutrons; Nuclear measurements; Photomultipliers; Photonic crystals; Preamplifiers; Shape measurement; Li-composed crystal scintilla-tor; Neutron detector; Phoswich detector;
Conference_Titel :
Nuclear Science Symposium Conference Record (NSS/MIC), 2009 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4244-3961-4
Electronic_ISBN :
1095-7863
DOI :
10.1109/NSSMIC.2009.5402103
