International Conference on Nuclear Data for Science and Technology 2010
J. Korean Phys. Soc. 59, 1547-1552
Paper ID: ND-1160
DOI: 10.3938/jkps.59.1547
PACS: 25.40.Fq, 28.20.-v
Study of Neutron Capture Reactions Using the 4π Ge Spectrometer
H. Harada1, S. Goko1, A. Kimura1, M. Ohta1, M. Oshima1, F. Kitatani1, Y. Toh1, K. Furutaka1, T. Kin1, M. Koizumi1, S. Nakamura1, M. Igashira2, T. Katabuchi2, M. Mizumoto2, T. Ohsaki2, J. Hori3, Y. Fujii3, K. Takamiya3, J. Goto4, Y. Kiyanagi5, K. Kino5, M. Furusaka5, F. Hiraga5 and T. Kamiyama5
1 Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency, Tokai-mura, Naka-gun, 319-1195, Japan
2 Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152-8550, Japan
3 Research Reactor Institute, Kyoto University, Asashiro Nishi, Kumatori-cho, Sennan-gun, Osaka, 590-0494, Japan
4 Radioisotope Center, Niigata University, Niigata, 951-8510, Japan
5 Graduate School of Engineering, Hokkaido University, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan
Abstract
The 4π Ge spectrometer composed of 22-30 Ge detectors was developed, and it has been used to study neutron capture reactions with a neutron time-of-flight (TOF) technique. Since the distances between the sample position and the Ge detectors are variable, it can be used as a multifunctional spectrometer. At first, it was used as a sum energy spectrometer, and resonances in natAg were identified as those of 107Ag or 109Ag. In second, it was used to deduce γ-ray intensity distribution for each resonance, and the results for 238U were presented. In third, it was used to measure neutron capture cross sections of minor actinides and fission products at the electron linear accerelator facility of KURRI and at the accurate neutron-nucleus reaction measurement instrument (ANNRI) in MLF of J-PARC. The preliminary results are discussed mainly based on measurements of neutron capture cross section for 241Am, together with related techniques.
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