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Stellar (n,gamma) cross section of 62Ni |
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| Authors: | Nassar H Paul M Ahmad I Berkovits D Bettan M Collon P Dababneh S Ghelberg S Greene J P Heger A Heil M Henderson D J Jiang C L Käppeler F Koivisto H O'Brien S Pardo R C Patronis N Pennington T Plag R Rehm K E Reifarth R Scott R Sinha S Tang X Vondrasek R |
| Affiliation: | Racah Institute of Physics, Hebrew University, Jerusalem, Israel, 91904. |
| 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 |
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