[Zurück]

M. Dietz, C. Lederer-Woods, A. Tattersall, U. Battino, M. Bacak, E. Griesmayer, E. Jericha, P. Kavrigin, H. Leeb, C. Weiß, -. n_TOF Collaboration et al.:
"Measurement of the ⁷²Ge(n,γ) cross section over a wide neutron energy range at the CERN n_TOF facility";
Physical Review C, 103 (2021), 045809; S. 1 - 8.

The ⁷²Ge(n,γ) cross section was measured for neutron energies up to 300 keV 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 ⁷²GeO₂ 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 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.

Hydrostatic stellar nucleosynthesis; Nuclear astrophysics; Nucleon induced nuclear reactions; Radiative capture; Resonance reactions; s process; 59 <= A <= 89

http://dx.doi.org/10.1103/PhysRevC.103.045809