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Journal Articles

Systematic effects on cross-section data derived from reaction rates at a cold neutron beam

$v{Z}$erovnik, G.*; Becker, B.*; Belgya, T.*; Genreith, C.*; Harada, Hideo; Kopecky, S.*; Radulovi$'c$, V.*; Sano, Tadafumi*; Schillebeeckx, P.*; Trkov, A.*

Nuclear Instruments and Methods in Physics Research A, 799, p.29 - 36, 2015/11

https://doi.org/10.1016/j.nima.2015.07.008
 Times Cited Count：4 Percentile：33.25(Instruments & Instrumentation)

The methodology to derive cross section data from measurements in a cold neutron beam was studied. Mostly, capture cross sections at thermal energy are derived relative to a standard cross section, and proportionality between the standard and the measured cross section is often assumed. Due to this assumption the derived capture cross section at thermal energy can be biased by more than 10%. Evidently the bias depends on how much the energy dependence of the cross section deviates from a direct proportionality with the inverse of the neutron speed. The effect is reduced in case the cross section is not derived at thermal energy but at an energy close to the average energy of the cold neutron beam. Nevertheless, it is demonstrated that the bias can only be avoided in case the energy dependence of the cross section is known and proper correction factors are applied. In some cases the results can also be biased when the attenuation of the neutron beam within the sample is neglected in the analysis. Some of the cross section data reported in the literature suffer from such bias effects.

Journal Articles

Multiple prompt $$gamma$$-ray analysis and construction of its beam line

Oshima, Masumi; Toh, Yosuke; Kimura, Atsushi; Ebihara, Mitsuru*; Oura, Yasuji*; Ito, Yasuo*; Sawahata, Hiroyuki*; Matsuo, Motoyuki*

Journal of Radioanalytical and Nuclear Chemistry, 271(2), p.317 - 321, 2007/02

https://doi.org/10.1007/s10967-007-0210-5
 Times Cited Count：11 Percentile：61.1(Chemistry, Analytical)

By combining neutron activation analysis with multiple $$gamma$$-ray detection, we have proved better sensitivity and resolution for the trace element analysis than the ordinary single $$gamma$$-ray detection method. We now try to apply the multiple $$gamma$$-ray detection method to the prompt $$gamma$$-ray analysis (PGA). We have established a new cold neutron beam line for PGA in Japan Research Reactor, JRR-3M, at Tokai establishment of Japan Atomic Energy Research Institute(JAERI). It consists of a beam shutter, a beam attenuator, a $$gamma$$-ray detector array, a sample changer, and a beam stopper. We construct a high-efficiency $$gamma$$-ray detector array specially designed for this purpose. Its performance has been evaluated with the Monte Carlo simulation code, GEANT 4.5.0.

Journal Articles

Nondestructive elemental analysis using neutron

Matsue, Hideaki; Tanji, Akira; Miyata, Satoru; Yasuda, Ryo; Matsubayashi, Masahito; Nakanishi, Tomoko

Dai-5-Kai Hoshasen Ni Yoru Hihakai Hyoka Shimpojiumu Koen Rombunshu, p.45 - 48, 2005/02

no abstracts in English

Journal Articles

The Recommended k$$_{0}$$-factors for neutron-induced prompt $$gamma$$-ray analysis and the prompt $$gamma$$-ray emission probabilities

Matsue, Hideaki; Yonezawa, Chushiro

Journal of Radioanalytical and Nuclear Chemistry, 262(1), p.49 - 55, 2004/07

https://doi.org/10.1023/B:JRNC.0000040853.53889.34
 Times Cited Count：9 Percentile：52.68(Chemistry, Analytical)

The recommended k$$_{0}$$ factors for 81 $$gamma$$-lines of 24 elements, which are useful for neutron induced prompt $$gamma$$-ray analysis (PGA) and are not influenced by neutron spectrum difference, were obtained from the k$$_{0}$$ factors measured with the cold and thermal guided neutron beams of JRR-3M by statistical calculation. The prompt $$gamma$$-ray emission probabilities were derived from the recommended k$$_{0}$$-factors using atomic weight, isotopic abundance and thermal neutron cross-section of other nuclear constants consisting the k$$_{0}$$ factors, for which one can obtain accurate data. The derived $$gamma$$-ray emission probabilities for the light elements (H to Ca) well agreed within $$pm$$10% with those of the ENSDF, which reflect recent data, which the agreements for heavy elements (Ti to Pb) were $$pm$$40% with those of the ENSDF, which are still composed of old data.

Journal Articles

Neutron spectrum correction of k$$_{0}$$-factors for k$$_{0}$$-based neutron-induced prompt $$gamma$$-ray analysis

Matsue, Hideaki; Yonezawa, Chushiro

Journal of Radioanalytical and Nuclear Chemistry, 255(1), p.125 - 129, 2003/01

https://doi.org/10.1023/A:1022244217832
 Times Cited Count：8 Percentile：49.89(Chemistry, Analytical)

no abstracts in English

Journal Articles

Multielement determination of typical diet reference materials by neutron-induced prompt $$gamma$$-ray analysis using k$$_{0}$$ standardization

Matsue, Hideaki; Yonezawa, Chushiro

Journal of Radioanalytical and Nuclear Chemistry, 249(1), p.11 - 14, 2001/06

https://doi.org/10.1023/A:1013278624744

no abstracts in English

Journal Articles

k$$_{0}$$ standardization approach in neutron-induced prompt $$gamma$$-ray analysis at JAERI

Matsue, Hideaki; Yonezawa, Chushiro

Journal of Radioanalytical and Nuclear Chemistry, 245(1), p.189 - 194, 2000/04

https://doi.org/10.1023/A:1006799213794
 Times Cited Count：21 Percentile：77.56(Chemistry, Analytical)

no abstracts in English

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