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Endo, Akira; Yamaguchi, Yasuhiro; Eckerman, K. F.*
JAERI 1347, 114 Pages, 2005/02
no abstracts in English
-factors for neutron-induced prompt 
-ray analysis and the prompt -ray emission probabilitiesMatsue, Hideaki; Yonezawa, Chushiro
Journal of Radioanalytical and Nuclear Chemistry, 262(1), p.49 - 55, 2004/07
Times Cited Count：9 Percentile：50.94(Chemistry, Analytical)The recommended k factors for 81 -lines of 24 elements, which are useful for neutron induced prompt -ray analysis (PGA) and are not influenced by neutron spectrum difference, were obtained from the k factors measured with the cold and thermal guided neutron beams of JRR-3M by statistical calculation. The prompt -ray emission probabilities were derived from the recommended k-factors using atomic weight, isotopic abundance and thermal neutron cross-section of other nuclear constants consisting the k factors, for which one can obtain accurate data. The derived -ray emission probabilities for the light elements (H to Ca) well agreed within 
10% with those of the ENSDF, which reflect recent data, which the agreements for heavy elements (Ti to Pb) were 40% with those of the ENSDF, which are still composed of old data.
Endo, Akira
Hoken Butsuri, 38(4), p.308 - 317, 2003/12
no abstracts in English
Endo, Akira; Yamaguchi, Yasuhiro; Eckerman, K. F.*
Radiation Protection Dosimetry, 105(1-4), p.565 - 569, 2003/09
Times Cited Count：12 Percentile：60.55(Environmental Sciences)The present paper discusses a strategy for the development of a new radioactive decay database, which will succeed ICRP Publ.38 used for dosimetry calculations. The development of the database requires 1) Consistency checking of the ENSDF used for compilation of the decay data, 2) Improvement of the computer code EDISTR for processing the ENSDF, and 3) Comparison with other decay data prepared from the different computer codes and libraries for the verification of the compiled data. This paper identifies several technical issues that need to be addressed for the development of the new radioactive decay database.
Endo, Akira; Yamaguchi, Yasuhiro
Journal of Nuclear Science and Technology, 39(Suppl.2), p.1433 - 1436, 2002/08
no abstracts in English
Endo, Akira
Nihon Genshiryoku Gakkai-Shi, 43(12), p.1191 - 1194, 2001/12
Times Cited Count：0 Percentile：0.00(Nuclear Science & Technology)Nuclear decay data, a set of data on half-life and energies and intensities of radiations emitted by nuclear transformation, are required in calculating external and internal doses by emissions from radionuclides. A nuclear decay database, which has been the most widely used for dose calculation in radiation protection, is Publication 38 (ICRP38) of the International Commission on Radiological Protection. The paper describes overview of ICRP38 and a future plan of its revision.
Endo, Akira; Yamaguchi, Yasuhiro
Journal of Nuclear Science and Technology, 38(8), p.689 - 696, 2001/08
Times Cited Count：4 Percentile：32.52(Nuclear Science & Technology)no abstracts in English
Endo, Akira; Yamaguchi, Yasuhiro
JAERI-Data/Code 2001-004, 157 Pages, 2001/03
JAERI-Data-Code-2001-004.pdf:11.27MB
New nuclear decay data used for dose calculation have been compiled for 817 radionuclides that are listed in ICRP Publication 38 (Publ.38) and for 6 additional isomers. The decay data were prepared using decay data sets from the Evaluated Nuclear Structure Data File (ENSDF), the latest version in August 1997. Basic nuclear properties in the decay data sets that are important for calculating energies and intensities of emissions were updated by referring to NUBASE. In addition, possible revisions of partial and incomplete decay data sets were done for their format and syntax errors, level schemes, normalization records, and so on. After that, the decay data sets were processed by EDISTR in order to compute the energies and intensities of 
particles, 
particles, rays, internal conversion electrons, X rays, and Auger electrons. The compiled data were prepared in two different types of format: Publ.38 and NUCDECAY formats. The decay data will be widely used for dose calculations in radiation protection and will be beneficial to a future revision of ICRP Publ.38.
Endo, Akira; Yamaguchi, Yasuhiro
Proceedings of 10th International Congress of the International Radiation Protection Association (IRPA-10) (CD-ROM), 8 Pages, 2000/05
no abstracts in English
Endo, Akira; ; Yamaguchi, Yasuhiro
JAERI-Data/Code 99-035, 355 Pages, 1999/07
JAERI-Data-Code-99-035.pdf:14.77MB
no abstracts in English
Endo, Akira; Yamaguchi, Yasuhiro
Radiation Protection Dosimetry, 82(1), p.59 - 64, 1999/00
Times Cited Count：2 Percentile：20.71(Environmental Sciences)no abstracts in English
Nakagawa, Tsuneo; Watanabe, Takashi*;
JAERI-Data/Code 97-050, 103 Pages, 1997/12
JAERI-Data-Code-97-050.pdf:2.73MB
no abstracts in English
Suyama, Kenya; Masukawa, Fumihiro*; ; ; ;
JAERI-Data/Code 97-021, 86 Pages, 1997/06
JAERI-Data-Code-97-021.pdf:2.3MB
no abstracts in English
Togawa, Orihiko; Yamaguchi, Yukichi
JAERI-Data/Code 96-003, 25 Pages, 1996/02
JAERI-Data-Code-96-003.pdf:1.04MB
no abstracts in English
Katakura, Junichi; Oshima, Masumi; Kitao, Kensuke*;
Nuclear Data Sheets, 70, p.217 - 314, 1993/00
no abstracts in English
Suga, Shinichi; Togawa, Orihiko; ; Yamaguchi, Yukichi; Kawai, Katsuo;
JAERI-M 92-110, 74 Pages, 1992/07
no abstracts in English
; ; ;
JAERI-M 86-121, 159 Pages, 1986/08
no abstracts in English
; ;
JAERI-M 83-016, 45 Pages, 1983/02
no abstracts in English
Iimura, Hideki*; Watanabe, Tomoaki
no journal, ,
The decay data required for burnup calculations, such as half-lives and branching ratios, are derived from the Evaluated Nuclear Structure Data File (ENSDF). Although the ENSDF is regularly updated based on available experimental data, the most recent revision for some nuclides is more than 10 years old. As a result, the latest evaluated nuclear data, JENDL-5, still uses outdated decay data for some nuclides. Therefore, we are currently conducting a new evaluation of outdated nuclides based on the latest experimental data, with the aim of updating the ENSDF and utilizing more reliable decay data. In this presentation, we report the results of a comparison between the new evaluation results conducted this year and the decay data from JENDL-5. As an example, the -decay half-lives of I-120, Cs-120, and Xe-120, which were estimated to be 81.6 min, 61.3 s, and 40 min, respectively, based on the latest experimental data. In this study, we performed a statistical analysis based on new experimental data and recommended values of 81.8 min, 64 s, and 46 min, respectively. Furthermore, the emission energy (Q value) and excitation energy were also newly evaluated, and significant differences with the JENDL-5 data were confirmed.
Iimura, Hideki*; Watanabe, Tomoaki; Suyama, Kenya
no journal, ,
The burnup calculation, which calculates nuclide composition and radioactivity in nuclear fuels, requires decay data such as half-lives and decay branching ratios. Most decay data in the latest Japanese Evaluated Nuclear Data Library JENDL-5 are from the Evaluated Nuclear Structure Data File (ENSDF), which is regularly updated by evaluating available experimental data. However, the latest revision of ENSDF is more than 10 years old for many nuclides; thus, the evaluation data are outdated. Therefore, we conducted a new evaluation of decay data for several nuclides for the ENSDF update and compared them with the decay data of JENDL-5. As an example of the results, we surveyed the reports on the measurement data for the beta-decay half-life of I-129, which is important nuclear data for radioactive waste management. We performed statistical analysis such as the 
-test and determined that the value in the latest report should be the recommended value rather than the average value including the older values. This value was about 3% larger than the value in JENDL-5. It was also found that there were differences in the half-life uncertainty and Q-value between JENDL-5 and the evaluation in this study.
