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Sosnin, N. V.*; 原田 秀郎; 木村 敦; 他128名*
Physical Review C, 107(6), p.065805_1 - 065805_9, 2023/06
被引用回数:1 パーセンタイル:25.07(Physics, Nuclear)The Se(n,
) reaction is of importance for
Se abundance during the slow neutron capture process in massive stars. We have performed a new measurement of the
Se radiative neutron capture cross section at the Neutron Time-of-Flight facility at CERN. Resonance capture kernels were derived up to 51 keV and cross sections up to 200 keV. Maxwellian-averaged cross sections were calculated for stellar temperatures between kT = 5 keV and kT = 100 keV, with uncertainties between 4.2% and 5.7%. Our results lead to substantial decreases of 14% and 19% in
Se abundances produced through the slow neutron capture process in selected stellar models, compared to using previous recommendation of the cross section.
片渕 竜也*; 松橋 泰平*; 寺田 和司; 井頭 政之*; 水本 元治*; 廣瀬 健太郎; 木村 敦; 岩本 信之; 原 かおる*; 原田 秀郎; et al.
Physical Review C, 91(3), p.037603_1 - 037603_5, 2015/03
被引用回数:8 パーセンタイル:48.00(Physics, Nuclear)Time-of-flight spectra of the neutron capture events of Nd were measured using a spallation neutron source at the Japan Proton Accelerator Research Complex. The first six resonances of
Nd reported in a previous work were not observed. The experimental results and cross-search of resonance energies in nuclear data libraries suggested that resonances of impurity nuclide
Pr have been mistakenly assigned as
Nd in the previous experiment. To investigate the impact of non-existence of the resonances to the s-process nucleosynthesis model, the Maxwellian averaged neutron capture cross sections with and without the misassigned resonances were compared.
大久保 牧夫; 河原崎 雄紀
Journal of Nuclear Science and Technology, 16(10), p.701 - 710, 1979/10
被引用回数:3Tbにおける中性子共鳴の測定を、原研リニアック飛行時間スペクトロメータにより行った。二種類のTbの試料について、中性子透過率,捕獲率の測定を、47m測定室にある
Li-glass,及びMoxon-Rae検出器により行った。中性子束の測定は透過型
Li-glass中性子束モニタを用いた。透過率データは、面積法により1.2KeVまで解析した。また捕獲率データは、モンテカルロプログラムCAFITにより、共鳴パラメータ2g
,
,
等を得た。754~1192eVの範囲の50本の共鳴パラメータは初めて得られた。以下の結果を得た。600eV以下で平均レベル間隔
D
=4.4
0.4eV,1.2KeV以下の206本のレベルにつき、S波強度関数So=(1.55
0.15)10
、また低い25レベルの平均輻射幅
=107
7meV。また50eV~30KeV範囲の平均捕獲断面積を求めた。