Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
岩本 修
JAEA-Conf 2024-002, p.41 - 46, 2024/11
The latest Japanese Evaluated Nuclear Data Library, JENDL-5, was released in 2021. JENDL-5 was developed with the amin of providing nuclear data to a wide range of application fields. JENDL-5 includes nuclear reaction data not only of neutron but also of proton, deuteron, alpha-particle, and photon. JENDL-5 also provides the data of thermal neutron scattering, fission product yields, and nuclear decay. These data were stored in separate sub-libraries; JENDL-5 consists of 11 sub-libraries. Regarding the neutron reaction data, the energy region was extended up to 200 MeV for 73 % of storing 795 target nuclei. The number of nuclei increased almost double of that of the previous version JENDL-4.0, covering most of the nuclei with the half-lives longer than 1 day. The revision of the data covered a wide range of nuclei from light to heavy ones reflecting the latest experimental data. The charged particle and photon induced reaction data were based on the data of the JENDL special purpose files released so far with revisions. JENDL-5 is expected to be applicable for large parts of computer simulations for radiations. For future, the covariance data in JENDL-5, whose updates and coverage are limited, will increase. Those data would be used to estimate reliability and uncertainties in the computer simulations originated from the nuclear data. The number of target nuclei of charged particle reaction data will also increase to satisfy future needs of wide area.
Bi at 13 and 17 MeV photon energiesNguyen, T. T. H.*; 岩本 信之; 佐波 俊哉*
JAEA-Conf 2024-002, p.139 - 143, 2024/11
Photonuclear data are essential for electron accelerator shielding design and possibly nuclear transmutation. So far, photonuclear cross-sections of various target materials have been evaluated up to a photon energy of 200 MeV within the nuclear data libraries, such as JENDL-5. Almost all data in JENDL-5 have been evaluated based on the experimental reaction cross-section data. Unfortunately, the photonuclear cross-section cannot provide all information about the emitted secondary particles, for instance, their energy distributions. Recently, the photoneutron energy spectra on the Bi target at 13 and 17 MeV photon energies have been measured. The 13 and 17 MeV photon beams are nearly monoenergetic and have high intensity. Given that Bi is one of the standard target materials, we re-evaluated the photonuclear data of this target according to (
), (
), and (
) reaction cross-section data by I. Gheorghe et al. The evaluation procedure was conducted on the CCONE code system. The photo-absorption cross-sections were evaluated with the giant dipole resonance (GDR) and quasi-deuteron (QD) models. The emission of photoneutrons is described by the exciton model for the preequilibrium process and the statistical model for the compound process. The photoneutron energy spectra have been compared to the experimental data to find the connection between the theoretical reaction models and experiment.
今野 力
JAEA-Conf 2024-002, p.80 - 85, 2024/11
2022年12月にJENDL-5の公式のACEファイルが公開された。JENDL-5の中性子ACEファイルは主にFRENDYコードで作成されたが、核発熱、損傷に関するデータ(発熱数、損傷生成エネルギー)はJENDL-5用に修正されたNJOY2016.65が使われた。本発表では、NJOY2016.65の修正点、JENDL-5の中性子入射ACEファイルに入っている核発熱、損傷データについて説明する。
深堀 智生
JAEA-Conf 2024-002, p.6 - 11, 2024/11
筆者は日本評価核データライブラリーと約38年間にわたり係ってきた。この間、前平衡核反応計算コード(ALICE-F)や粒子・重イオン輸送コードシステム(PHITS)などのコード開発に貢献してきた。また、筆者はEXFOR活動を支援し、評価核データ処理コード(FRENDY)及び多相多成分詳細熱流体解析コード(JUPITER)の開発を推進支援してきた。本稿では著者の核データ活動の概要を紹介する。さらに、核データの将来の形に対する筆者の視点と課題も報告する。
from 3-GeV protons and 
Hg with the Bi(n,xn) reactions杉原 健太*; 明午 伸一郎; 岩元 大樹; 前川 藤夫
JAEA-Conf 2024-002, p.162 - 167, 2024/11
中性子エネルギースペクトルは加速器駆動システム(1.5GeV p+鉛ビスマス共晶合金)における遮蔽設計にとって重要である。同様のスペクトルはJ-PARC(3GeV陽子+Hg)でも得られる。アンフォールディングの妥当性を確認するため、Bi(n,xn)反応と応答関数(JENDL/HE-2007とTALYS)を用いたアンフォールディングを行った。ポスターでは、スペクトルの導出と飛行時間法を用いたスペクトルとの比較を発表する。
