Measurement of the 72Ge(n,γ) cross section over a wide neutron energy range at the CERN n_TOF facility

nTOF Collaboration, T. Rauscher

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Abstract

The Ge72(n,γ) cross section was measured for neutron energies up to 300keV at the neutron time-of-flight facility n_TOF (CERN), Geneva, for the first time covering energies relevant to heavy-element synthesis in stars. The measurement was performed at the high-resolution beamline EAR-1, using an isotopically enriched GeO272 sample. The prompt capture γ rays were detected with four liquid scintillation detectors, optimized for low neutron sensitivity. We determined resonance capture kernels up to a neutron energy of 43keV, and averaged cross sections from 43 to 300keV. Maxwellian-averaged cross section values were calculated from kT=5 to 100keV, 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.
Original languageEnglish
Article number045809
Number of pages8
JournalPhysical Review C (nuclear physics)
Volume103
Issue number4
DOIs
Publication statusPublished - 27 Apr 2021

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