Stellar (n,gamma) cross section of 62Ni.
/ Authors
H. Nassar, M. Paul, I. Ahmad, D. Berkovits, M. Bettan, P. Collon, S. Dababneh, S. Ghelberg, J. Greene, A. Heger
and 16 more authors
M. Heil, D. Henderson, C. L. Jiang, F. Käppeler, H. Koivisto, S. O'Brien, R. Pardo, N. Patronis, T. Pennington, R. Plag, K. Rehm, R. Reifarth, R. Scott, S. Sinha, X. Tang, R. Vondrasek
/ Abstract
The 62Ni(n,gamma)63Ni(t(1/2)=100+/-2 yr) reaction plays an important role in the control of the flow path of the slow neutron-capture (s) nucleosynthesis process. We have measured for the first time the total cross section of this reaction for a quasi-Maxwellian (kT=25 keV) neutron flux. The measurement was performed by fast-neutron activation, combined with accelerator mass spectrometry to detect directly the 63Ni product nuclei. The experimental value of 28.4+/-2.8 mb, fairly consistent with a recent calculation, affects the calculated net yield of 62Ni itself and the whole distribution of nuclei with 62
Journal: Physical review letters