C. Lederer, C. Massimi, E. Griesmayer, E. Jericha, H. Leeb, C. Weiß, -. nTOF Collaboration et al.:
"62Ni(n, γ) and 63Ni(n, γ) cross sections measured at the n_TOF facility at CERN";
Physical Review C,
The cross section of the 62Ni(n, γ) reaction was measured with the time-of-flight technique at the neutron time-of-flight facility n_TOF at CERN. Capture kernels of 42 resonances were analyzed up to 200 keV neutron energy and Maxwellian averaged cross sections (MACS) from kT = 5-100 keV were calculated. With a total uncertainty of 4.5%, the stellar cross section is in excellent agreement with the the KADoNiS compilation at kT = 30 keV, while being systematically lower up to a factor of 1.6 at higher stellar temperatures. The cross section of the 63Ni(n,γ) reaction was measured for the first time at n_TOF. We determined unresolved cross sections from 10 to 270 keV with a systematic uncertainty of 17%. These results provide fundamental constraints on s-process production of heavier species, especially the production of Cu in massive stars, which serve as the dominant source of Cu in the solar system.
Radiative capture, Resonance reactions, s-process, 59 <= A <= 89
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