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Measurement of the $$^{77}$$Se(n,$$gamma$$) cross section up to 200 keV at the n_TOF facility at CERN

Sosnin, N. V.*; 原田 秀郎   ; 木村 敦   ; 他128名*

Sosnin, N. V.*; Harada, Hideo; Kimura, Atsushi; 128 of others*

The $$^{77}$$Se(n,$$gamma$$) reaction is of importance for $$^{77}$$Se abundance during the slow neutron capture process in massive stars. We have performed a new measurement of the $$^{77}$$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 $$^{77}$$Se abundances produced through the slow neutron capture process in selected stellar models, compared to using previous recommendation of the cross section.

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パーセンタイル:25.07

分野:Physics, Nuclear

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