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Se(
, n) cross section and the evaluation of uncertainty of 
Se(n, ) cross sectionKitatani, Fumito
Kaku Deta Nyusu (Internet), (114), p.44 - 49, 2016/06
no abstracts in English
Kimura, Atsushi; Harada, Hideo; Nakamura, Shoji; Iwamoto, Osamu; Toh, Yosuke; Koizumi, Mitsuo; Kitatani, Fumito; Furutaka, Kazuyoshi; Igashira, Masayuki*; Katabuchi, Tatsuya*; et al.
European Physical Journal A, 51(12), p.180_1 - 180_8, 2015/12
Times Cited Count：3 Percentile：30.26(Physics, Nuclear)
W, 
Re and 
Os; Implications for the Re-Os cosmochronologyShizuma, Toshiyuki; Utsunomiya, Hiroaki*; Mohr, P.*; Hayakawa, Takehito; Goko, Shinji*; Makinaga, Ayano*; Akimune, Hidetoshi*; Yamagata, Tamio*; Ota, Masahisa*; Ogaki, Hideaki*; et al.
Physical Review C, 72(2), p.025808_1 - 025808_9, 2005/08
Times Cited Count：43 Percentile：90.03(Physics, Nuclear)Cross sections of the W, Re, Os(
) reactions were measured using quasi-monochromatic photon beams from laser Compton scattering (LCS) with average energies from 7.3 to 10.9 MeV. The results are compared with the predictions of Hauser-Feshbach statistical calculations using four different sets of input parameters. In addition, the inverse neutron capture cross sections were evaluated by constraining the model parameters, especially the 
strength function, on the basis of the experimental data. The present experiment helps to further constrain the correction factor 
for the neutron capture on the 9.75 keV state in Os. Implications of to the Re-Os cosmochronology are discussed with a focus on the uncertainty in the estimate of the age of the Galaxy.
W, Re and Os for cosmochronologyShizuma, Toshiyuki; Utsunomiya, Hiroaki*; Goko, Shinji*; Mohr, P.*; Hayakawa, Takehito; Makinaga, Ayano*; Hara, Kaoru*; Ogaki, Hideaki*; Lui, Y.-W.*; Goriely, S.*
Nuclear Physics A, 758, p.561c - 564c, 2005/07
Photodisintegration experiments were carried out for W, Re, and Os using quasi-monochromatic -ray beams from laser Compton scattering (LCS) at the National Institute of Advanced Industrial Science and Technology. The excitation function of (,n) cross sections was measured for the three nuclei near neutron thresholds, taking advantage of the intense peaking of the energy-tunable LCS beam in the energy region of astrophysical importance. Neutron capture cross sections for 
W, Re, and Os are evaluated from the photodisintegration data with the Hauser-Feshbach statistical model. We quantitatively discuss the two corrections factors for the s-process branchings and the neutron capture on the 9.75 keV state.
-process branching at W revisedMohr, P.*; Shizuma, Toshiyuki; Ueda, Hiroyasu*; Goko, Shinji*; Makinaga, Ayano*; Hara, Kaoru*; Hayakawa, Takehito; Lui, Y.-W.*; Ogaki, Hideaki*; Utsunomiya, Hiroaki*
Physical Review C, 69(3), p.032801_1 - 032801_4, 2004/03
Times Cited Count：35 Percentile：84.6(Physics, Nuclear)The neutron capture cross section of the unstable s-process branching nucleus W has been derived from experimental data of the inverse W(,n)W photodisintegration taken with monochromatic photon beams from laser Compton scattering. The result of 
mb at 
keV leads to a relatively high effective neutron density in the classical s process of 
. A realistic model for the s process in thermally pulsing AGB stars overestimates the abundance of Os significantly because of the relatively small neutron capture cross section of W.
-ray spectroscopic methodsFurutaka, Kazuyoshi
JNC TN8400 2000-028, 70 Pages, 2000/10
JNC-TN8400-2000-028.pdf:1.71MB
This report describes the study done by the author as a postdoctoral research associate at Japan Nuclear Cycle Development Institute. This report is divided into two parts: improvements in accuracy in determination of thermal neutron capture cross sections, and improvements in accuracy of photo-nuclear absorption cross section measurements using the HHS. (1)In the measurements of thermal neutron capture cross sections using an activation method, accuracies of the final results attained are limited by (1) accuracy of -ray peak detection efficiencies, and (2) accuracies of -ray emission probabilities. In this study; to determine thermal neutron capture cross sections more accurately, the following researches have been done using a newly developed three-dimensional coincidence measurement system: (1)accurate determination of -ray standard sources using a - coincidence method, for precise calibration of -ray peak detection efficiency, and (2) development of a 
- coincidence measurement system using a plastic scintillation detector as a -ray detector, for the determination of -ray emission probabilities of short-lived nuclides, and measurement of -ray emission probabilities of 
Tc nuclide using the coincidence system. (2)To transform radioactive nuclides with small thermal neutron capture cross sections, use of photonuclear absorption reaction has been suggested. In order to transform these nuclides efficiently using the reaction, one has to know detailed behavior of the photo-absorption cross sections. In this study, a Monte-Carlo simulation code has been used to create a standard set of -ray response functions of the high-resolution high-energy spectrometer (HHS), to enable reliable analyses of the data obtained by the spectrometer.
*
JNC TJ9400 2000-008, 61 Pages, 2000/02
For studies on nuclear transmutation of long-lived fission products (LLFPs) in a fast reactor, detailed characteristics of reactor core such as transmutation performance have to be investigated, so accurate neutron cross section data of LLFPs become necessary. Therefore, the keV-neutron capture cross sections of Tc-99, which is one of important LLFPs, were measured in the present study to obtain the accurate data. The measurement was relative to the standard capture cross sections of Au-197. A neutron time-of-flight method was adopted with a ns-pulsed neutron source by a Pelletron accelerator and a large anti-Compton NaI(TI) gamma-ray detector. As a result, the capture cross sections of Tc-99 were obtained with the error of about 5 % in the incident neutlon energy region of 10 to 600 keV. The present data were compared with other experimental data and the evaluated values of JENDL-3.2, and it was found that the evaluations of JENDL-3.2 were 15-20 % smaller than the present measurements.
*; *
JNC TJ9400 2000-004, 109 Pages, 2000/02
JNC-TJ9400-2000-004.pdf:4.96MB
We estimated covariances of the JENDL-3.2 data on the nuclides and reactions needed to analyze fast-reactor cores for the past three years, and produced covariance files. The present work was undertaken to re-examine the covariance files and to make some improvements. The covariances improved are the ones for the inelastic scattering cross section of 
O, the total cross section of 
Na, the fission cross section of 
U, the capture cross section of 
U, and the resolved resonance parameters for U. Moreover, the covariances of 
U data were newly estimated by the present work. The covariances obtained were compiled in the ENDF-6 format.
Nishinaka, Ichiro
Kagaku To Kogyo, 53(5), P. 607, 2000/00
no abstracts in English
*
JNC TJ9400 99-001, 78 Pages, 1999/03
For studies on incineration of long-lived fission products (LLFPs) in a fast reactor, detailed characteristics of reactor core such as incineration performance have to be investigated. Therefore, accurate neutron cross section data of LLFPs become necessary. In the present study, in order to perform the precise measurements of keV-neutron capture cross sections of Tc-99, which is one of most important LLFPs, the details of the Tc-99 sample and the measurements with our experimental facilities were investigated.
Re in the W(p,n) and W(d,2n) reactions in connection to the paper given by Z.H.Zhu et at. and correction of the calculated yields of Re in the W(p,n) reactionIshioka, Noriko; Sekine, Toshiaki; R.M.Lambrecht*
Journal of Radioanalytical and Nuclear Chemistry, 241(2), 383 Pages, 1999/00
Times Cited Count：4 Percentile：59.59(Chemistry, Analytical)no abstracts in English
Konno, Chikara; Maekawa, Fujio; Wada, Masayuki*; Kosako, Kazuaki*
Fusion Technology, 34(3), p.1013 - 1017, 1998/11
no abstracts in English
Si+
Ni; ; ; ; ; *; *; *; *
Phys.Lett.,B, 176(3-4), p.302 - 306, 1986/00
no abstracts in English
*;
Nuclear Instruments and Methods, 148(1), p.157 - 161, 1978/01
no abstracts in English
JAERI-M 6306, 53 Pages, 1975/11
no abstracts in English
Cf;Physical-Chemical properties*; ; *; ;
Radioisotopes, 24(4), p.262 - 272, 1975/04
no abstracts in English
Genshikaku Kenkyu, 7(6), 580 Pages, 1962/00
no abstracts in English
-ray analysis at J-PARC/MLF/ANNRIKimura, Atsushi
no journal, ,
no abstracts in English
Kimura, Atsushi; Harada, Hideo; Nakamura, Shoji; Toh, Yosuke; Igashira, Masayuki*; Katabuchi, Tatsuya*; Mizumoto, Motoharu*; Hori, Junichi*; Kino, Koichi*
no journal, ,
Sn with the array of Ge spectrometer at the J-PARC/MLF/ANNRIKimura, Atsushi; Harada, Hideo; Nakamura, Shoji; Toh, Yosuke; Igashira, Masayuki*; Katabuchi, Tatsuya*; Mizumoto, Motoharu*; Hori, Junichi*; Kino, Koichi*
no journal, ,
