Measurement of the Ge(n,) cross section over a wide neutron energy range at the CERN n_TOF facility

Dietz, M.*; 原田 秀郎   ; 木村 敦   ; 他121名*

Dietz, M.*; Harada, Hideo; Kimura, Atsushi; 121 of others*

The Ge(n,) cross section was measured for neutron energies up to 300 keV at the neutron time-of-flight facility n_TOF (CERN). The measurement was performed at the high-resolution beamline EAR-1, using an isotopically enriched Ge sample. The prompt capture rays were detected with four liquid scintillation detectors, optimized for low neutron sensitivity. We determined resonance capture kernels up to a neutron energy of 43 keV, and averaged cross sections from 43 to 300 keV. Maxwellian-averaged cross section values were calculated from kT = 5 to 100 keV, with uncertainties between 3.2% and 7.1%. The new results significantly reduce uncertainties of abundances produced in the slow neutron capture process in massive stars.