Neutron capture cross-section measurement and resolved resonance analysis of Np

Rovira, G.*; Katabuchi, Tatsuya*; Tosaka, Kenichi*; Matsuura, Shota*; Terada, Kazushi*; Iwamoto, Osamu; Kimura, Atsushi; Nakamura, Shoji; Iwamoto, Nobuyuki; Segawa, Mariko; et al.

Journal of Nuclear Science and Technology, 57(1), p.24 - 39, 2020/01

https://doi.org/10.1080/00223131.2019.1651231

JENDL/ImPACT-2018; A New nuclear data library for innovative studies on transmutation of long-lived fission products

Kunieda, Satoshi; Furutachi, Naoya; Minato, Futoshi; Iwamoto, Nobuyuki; Iwamoto, Osamu; Nakayama, Shinsuke; Ebata, Shuichiro*; Yoshida, Toru*; Nishihara, Kenji; Watanabe, Yukinobu*; et al.

Journal of Nuclear Science and Technology, 56(12), p.1073 - 1091, 2019/12

https://doi.org/10.1080/00223131.2019.1647889

A new nuclear data library, JENDL/ImPACT-2018, is developed for an innovative study on the transmutation of long-lived fission products. Nuclear reaction cross- sections are newly evaluated for incident neutrons and protons up to 200 MeV for 163 nuclides including long-lived nuclei such as Se, Zr, Pd and Cs. Our challenge is an evaluation of cross-sections for a number of unstable nuclei over a wide energy range where the experimental data are very scarce. We estimated cross- sections based on a nuclear model code CCONE that incorporates an advanced knowledge on the nuclear structure theory and a model-parameterization based on a new experimental cross-sections measured by the inverse kinematics. Through comparisons with available experimental data on the stable isotopes, it is found that the present data give predictions of cross-sections better than those in the existing libraries.

Report of 31st Meeting of the Working Party on International Nuclear Data Evaluation Co-operation (WPEC)

Iwamoto, Osamu; Iwamoto, Nobuyuki; Kimura, Atsushi; Yokoyama, Kenji; Tada, Kenichi

Kaku Deta Nyusu (Internet), (124), p.23 - 34, 2019/10

The 31st annual meeting and the subgroup meeting of the Working Party on International Nuclear Data Evaluation Co-operation (WPEC) under the Nuclear Energy Agency of the Organisation for Economic Co-operation and Development (OECD/NEA) was held at the head quarter of OECD/NEA located at Boulogne-Billancourt near Paris from 24 to 28 in June in 2019. The activities about nuclear data measurement and evaluation of each region or country were reported at the annual meeting, and the SG activities were discussed at the subgroup meetings. The summary of these meetings are reported.

Measurements of the Am neutron capture and total cross sections with ANNRI at J-PARC

Kimura, Atsushi; Nakamura, Shoji; Terada, Kazushi*; Nakao, Taro*; Mizuyama, Kazuhito*; Iwamoto, Nobuyuki; Iwamoto, Osamu; Harada, Hideo; Katabuchi, Tatsuya*; Igashira, Masayuki*; et al.

Journal of Nuclear Science and Technology, 56(6), p.479 - 492, 2019/06

https://doi.org/10.1080/00223131.2019.1598508

International Conference on Nuclear Data for Science and Technology (ND2019), 3; Evaluation and theory

Nakayama, Shinsuke; Iwamoto, Osamu; Iwamoto, Nobuyuki; Hashimoto, Shintaro

Kaku Deta Nyusu (Internet), (123), p.53 - 59, 2019/06

http://www.aesj.or.jp/~ndd/ndnews/pdf123/No123-08.pdf

The 2019 International Conference on Nuclear Data for Science and Technology (ND2019) was held at the China National Convention Center on May 19-24, 2019. The series of the ND conferences are the largest conferences in nuclear data research field that are held every three years. In this paper, as a part of the conference reports of ND2019, the authors gave summaries of the presentations on nuclear data evaluation and theory conducted at the conference.

3rd RCM on Updating the Photonuclear Data Library and Generating a Reference Database for Photon Strength Functions

Utsunomiya, Hiroaki*; Iwamoto, Nobuyuki; Kawano, Toshihiko*

Kaku Deta Nyusu (Internet), (122), p.26 - 32, 2019/02

http://www.aesj.or.jp/~ndd/ndnews/pdf122/No122-06.pdf

no abstracts in English

Dipole strength distribution in Pb for the evaluation of the neutron capture cross section of Pb

Shizuma, Toshiyuki; Iwamoto, Nobuyuki; Makinaga, Ayano*; Massarczyk, R.*; Schwengner, R.*; Beyer, R.*; Bemmerer, D.*; Dietz, M.*; Junghans, A.*; Kgler, T.*; et al.

Physical Review C, 98(6), p.064317_1 - 064317_12, 2018/12

https://doi.org/10.1103/PhysRevC.98.064317

The dipole strength distribution of Pb was investigated via a nuclear resonance fluorescence experiment using bremsstrahlung produced with an electron beam at a kinetic energy of 10.5 MeV at the linear accelerator ELBE. We identified 88 states resonantly excited at energies from 3.7 to 8.2 MeV. The photo-absorption cross sections were extracted from the measured scattering cross sections and the branching ratios. The present (,) data combined with (,) data from the literature were used as an input to the statistical calculation code CCONE to evaluate the neutron capture cross section of the unstable Pb nucleus.

Report on the 30th Meeting of Working Party on International Nuclear Data Evaluation Co-operation

Iwamoto, Osamu; Iwamoto, Nobuyuki; Kimura, Atsushi; Yokoyama, Kenji; Tada, Kenichi

Kaku Deta Nyusu (Internet), (120), p.35 - 46, 2018/06

http://www.aesj.or.jp/~ndd/ndnews/pdf120/No120-06.pdf

We report 30th WPEC meeting, expert group meeting, and subgroup meeting in Paris, May 14-18, 2018.

Evaluation of neutron capture cross section on Pb with photonuclear data

Iwamoto, Nobuyuki; Shizuma, Toshiyuki*

EPJ Web of Conferences, 178, p.06004_1 - 06004_3, 2018/05

https://doi.org/10.1051/epjconf/201817806004

Report on the 16th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics

Iwamoto, Nobuyuki

Kaku Deta Nyusu (Internet), (119), p.1 - 5, 2018/02

http://www.aesj.or.jp/~ndd/ndnews/pdf119/No119-01.pdf

no abstracts in English