Precise Intensity Measurements in the super(14)N(n, gamma) super(15)N Reaction as a gamma-Ray Intensity Standard up to 11 MeV

The main gamma-ray intensities in the super(14)N(n, gamma) super(15)N reaction were determined at an accuracy of 0.3-1.0% based on the intensity balance principle. Measurements were performed at the supermirror neutron guide tube at the Kyoto University reactor (KUR). A liquid nitrogen target and a...

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Bibliographic Details
Published in:Journal of nuclear science and technology 2008-01, Vol.45 (6), p.481-486
Main Authors: Miyazaki, Itaru, Sakane, Hitoshi, Takayama, Hirokazu, Kasaishi, Masafumi, Tojo, Akinori, Furuta, Masataka, Hayashi, Hiroaki, Suematsu, Osamu, Narasaki, Hiromichi, Shimizu, Toshiaki, Shibata, Michihiro, Kawade, Kiyoshi, Taniguchi, Akihiro, Harada, Hideo
Format: Article
Language:English
Subjects:
Computational efficiency
Computing time
Liquid nitrogen
Mathematical analysis
Melamine
Nuclear engineering
Oscillations
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Summary:The main gamma-ray intensities in the super(14)N(n, gamma) super(15)N reaction were determined at an accuracy of 0.3-1.0% based on the intensity balance principle. Measurements were performed at the supermirror neutron guide tube at the Kyoto University reactor (KUR). A liquid nitrogen target and a deuterated melamine (C sub(3)D sub(6)N sub(6)) one were used. We prepared a full-energy-peak efficiency curve by combining the measured and calculated efficiency curves. The previous values widely used as intensity standards agreed with the present results within 4-5% in the 2-11 MeV region, but the ratio to the present values showed a monotonic decrease with the increase in gamma-ray energy. The results reported by Belgya in 2006 agreed with the present one within 2-3% in the 2-8 MeV region; nevertheless, the ratio showed a small oscillation versus gamma-ray energy.
ISSN:0022-3131
DOI:10.3327/jnst.45.481