Stellar (n,gamma) cross section of Ni-62
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Date
Authors
Nassar, H.
Paul, M.
Ahmad, I.
Berkovits, D.
Bettan, M.
Collon, P.
Dababneh, S.
Ghelberg, S.
Greene, J. P.
Heger, A.
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peer reviewed
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Phys Rev Lett
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The Ni-62(n,gamma)Ni-63(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 Ni-63 product nuclei. The experimental value of 28.4 +/- 2.8 mb, fairly consistent with a recent calculation, affects the calculated net yield of Ni-62 itself and the whole distribution of nuclei with 62 < A < 90 produced by the weak s process in massive stars.
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massive stars, ion-source, s-process, capture, nucleosynthesis, separation
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<Go to ISI>://000227566000017
http://prl.aps.org/abstract/PRL/v94/i9/e092504
http://prl.aps.org/abstract/PRL/v94/i9/e092504
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en
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Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών