TY  - JOUR
AU  - n_TOF Collaboration (Lederer, C. et al
AU  - Giubrone, G.
AU  - Tain, J. L.
PY  - 2014
DA  - 2014//
TI  - Ni-62(n,gamma) and Ni-63(n,gamma) cross sections measured at the n_TOF facility at CERN
T2  - Phys. Rev. C
JO  - Physical Review C
SP  - 025810
EP  - 11pp
VL  - 89
IS  - 2
PB  - Amer Physical Soc
AB  - The cross section of the Ni-62(n,gamma) 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 Ni-63(n,gamma) 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.
SN  - 0556-2813
UR  - http://arxiv.org/abs/arXiv:1403.4778
UR  - https://doi.org/10.1103/PhysRevC.89.025810
DO  - 10.1103/PhysRevC.89.025810
LA  - English
N1  - WOS:000332175500012
ID  - n_TOFCollaborationLederer_etal2014
ER  -