Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Se(n,
) cross section up to 200 keV at the n_TOF facility at CERNSosnin, 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：3 パーセンタイル：40.05(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.
Ge(n,) cross section below 70 keV measured at n_TOF CERNLederer-Woods, C.*; 原田 秀郎; 木村 敦; 他128名*
European Physical Journal A, 58(12), p.239_1 - 239_9, 2022/12
被引用回数：2 パーセンタイル：12.34(Physics, Nuclear)Neutron capture reaction cross sections on Ge are of importance to determine Ge production during the astrophysical slow neutron capture process. We present new resonance data on Ge(n,) reactions below 70 keV neutron energy. We calculate Maxwellian averaged cross sections, combining our data below 70 keV with evaluated cross sections at higher neutron energies. Our stellar cross sections are in agreement with a previous activation measurement performed at Forschungszentrum Karlsruhe by Marganiec et al., once their data has been re-normalised to account for an update in the reference cross section used in that experiment.
Ge(n,) cross sections and implications for stellar nucleosynthesisLederer-Woods, C.*; Battino, U.*; Ferreira, P.*; Gawlik, A.*; 木村 敦; n_TOF Collaboration*; 他128名*
Physics Letters B, 790, p.458 - 465, 2019/03
被引用回数：18 パーセンタイル：78.04(Astronomy & Astrophysics)
cross sections were measured at the neutron time-of-flight facility n_TOF at CERN up to neutron energies of 300 keV, providing for the first time experimental data above 8 keV. Results indicate that the stellar cross section at 
=30 keV is 1.5 to 1.7 times higher than most theoretical predictions. The new cross sections result in a substantial decrease of Ge produced in stars, which would explain the low isotopic abundance of Ge in the solar system.
