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N(n,
)
N reaction as a -ray intensity standard up to 11 MeVMiyazaki, Itaru*; Sakane, Hitoshi*; Takayama, Hirokazu*; Kasaishi, Masafumi*; Tojo, Akinori*; Furuta, Masataka*; Hayashi, Hiroaki*; Suematsu, Osamu*; Narasaki, Hiromichi*; Shimizu, Toshiaki*; et al.
Journal of Nuclear Science and Technology, 45(6), p.481 - 486, 2008/06
Times Cited Count：5 Percentile：35.07(Nuclear Science & Technology)The intensities of the prompt rays from the N(n,)N reaction have been precisely measured. As the samples, a liquid nitrogen target and a deuterated melamine (C
D
N) were used. The previous values widely used as intensity standards agreed with those obtained in this study within 4-5% in the 2-11 MeV region, however, showed a monotonous decrease with the increase of -ray energy.
Miyazaki, Itaru*; Shimizu, Toshiaki*; Shibata, Michihiro*; Kawade, Kiyoshi*; Furutaka, Kazuyoshi; Nakamura, Shoji; Sakane, Hitoshi
JNC TY8400 2005-002, 40 Pages, 2005/06
JNC-TY8400-2005-002.pdf:2.69MB
Accurate cross section data for the neutron capture of long-lived fission products (LLFP) are needed for developing a nuclear transmutation technology which reduces radioactive wastes by transmuting nuclides that have half-lives of as long as a few million years to other nuclides that have much shorter half-lives. There are some nuclides, whose cross sections cannot be measured in activation method. Utilization of prompt gamma-rays is expected to solve this problem. The aim of present study was twofold: (i) to measure emission probabilities of the high energy gamma-ray, up to 10MeV, emitted fromN(n, gamma)N reaction, which are usually used as standards, in order to improve their accuracies and (ii) to develop a measurement method for neutron capture cross sections by using prompt gamma-rays. Emission probabilities of principal prompt gamma-rays fromN(n, gamma)N reaction were determined with 0.2-0.9% errors. For ten nuclides,
Na,
Al,
55 Mn,
Ni,
Cu,
Pr,
W, and
capture cross sections were measured by using prompt gamma-rays and gamma-rays following b-decay. By comparing both cross section values, it was found that emission probabilities of prompt gamma-rays reported in the literatures were systematically larger than those inferred from the cross sections that were determined in activation methods. The cross section of a
Pd (n, gamma)
Pd reaction at thermal energy was measured. Considering transmutation of the nuclide, the cross section ofPd(n, gamma), which is an isotope of palladium, is also necessary. A lower limit of the cross section was determined with 6% accuracy. Additionally, a method of estimating an upper limit was examined by noting similarity of nuclear structures to the neighboring nuclides. It was estimated that the observed lower limit of emission probabilities correspond to 79% of the cross section.
Fukuda, Mitsuhiro; Okumura, Susumu; Ishii, Yasuyuki; Saito, Yuichi; Miyawaki, Nobumasa; Mizuhashi, Kiyoshi; Agematsu, Takashi; Kurashima, Satoshi; Chiba, Atsuya; Sakai, Takuro; et al.
Dai-14-Kai Kasokuki Kagaku Kenkyu Happyokai Hokokushu, p.302 - 304, 2003/00
no abstracts in English
Kurihara, Yuji*; Tokunaga, Masahiro*; Miyazaki, Kiyoshi*; Igarashi, H.*; Ono, O.*; Uchiyama, K.*; Kuzutani, Yoko*; Hayami, Takuya*
PNC TJ1201 94-001, 26 Pages, 1994/02
no abstracts in English
Kurihara, Yuji*; Tokunaga, Masahiro*; Miyazaki, Kiyoshi*; Makabe, Y.*; Fukaya, Masaaki*; Ono, O.*; Namiki, Kazuto*
PNC TJ1201 92-002, 45 Pages, 1992/02
None
Kurihara, Yuji*; Tokunaga, Masahiro*; Miyazaki, Kiyoshi*; Makabe, Y.*; Fukaya, Masaaki*; Ono, O.*; Namiki, Kazuto*
PNC TJ1201 92-001, 151 Pages, 1992/02
None
