Title: Experimental neutron capture data of 58Ni from the CERN n_TOF facility
Authors: ZUGEC P.BARBAGALLO M.COLONNA N.BOSNAR D.ALTSTADT S.ANDRZEJEWSKI J.AUDOUIN L.BECARES V.Becvár F.BELLONI F.BERTHOUMIEUX E.BILLOWES J.BOCCONE V.BRUGGER M.CALVIANI M.CALVIÑO F.CANO-OTT D.CARRAPIÇO C.CHIAVERI E.CERUTTI F.CHIN M.CORTES G.CORTES-GIRALDO M. A.DIAKAKI M.DOMINGO-PARDO C.DURAN I.DZYSIUK N.ELEFTHERIADIS C.FERRARI A.FRAVAL K.GANESAN S.GARCIA A. R.GIUBRONE G.GOMEZ-HORNILLOS M. B.GONZALEZ-ROMERO E.GONÇALVES I.GRIESMAYER E.GUERRERO C.GUNSING F.GURUSAMY P.JENKINS D. G.JERICHA E.KADI Y.KARADIMOS D.KOEHLER P.KOKKORIS M.KROLL J.Krticka M.KÄPPELER F.LANGER C.LEDERER C.LEEB H.LEONG L. S.LOSITO R.MANOUSOS AMARGANIEC J.MARTÍNEZ T.MASSIMI C.MASTINU P.MASTROMARCO M.MEAZE M.MENDOZA E.MENGONI A.MILAZZO P. M.MINGRONE F.MIREA M.MONDELAERS WillyPARADELA C.PAVLIK AndreasPERKOWSKI J.PLOMPEN ArjanPRAENA J.QUESADA J.RAUSCHER T.REIFARTH R.RIEGO A.ROMAN F.RUBBIA C.SARMENTO R.SCHILLEBEECKX PeterSCHMIDT S.TAGLIENTE G.TAIN J. L.TARRIO D.TASSAN-GOT L.TSINGANIS A.VALENTA S.VANNINI G.VARIALE V.VAZ P.VENTURA A.VERMEULEN M.VERSACI R.VLACHOUDIS V.VLASTOU R.WALLNER A.WARE T.WEIGAND M.WEISS C.WRIGHT T. J.PIGNATARI M.
Citation: PHYSICAL REVIEW C vol. 89 no. 1 p. 014605 [9 pages]
Publisher: AMER PHYSICAL SOC
Publication Year: 2014
JRC N°: JRC84274
ISSN: 0556-2813
URI: http://link.aps.org/doi/10.1103/PhysRevC.89.014605
http://publications.jrc.ec.europa.eu/repository/handle/JRC84274
DOI: 10.1103/PhysRevC.89.014605
Type: Articles in periodicals and books
Abstract: The 58Ni(n, gamma) cross section has been measured at the neutron time of flight facility n_TOF at CERN, in the energy range from thermal up to 300 keV. In the resolved resonance region, extending up to 122 keV neutron energy, 51 resonances could be identified. The Maxwellian averaged cross sections (MACS) have been calculated for thermal values kT = 5 - 100 keV with uncertainties of less than 6%, showing fair agreement with recent experimental and evaluated data for thermal energies up to 40 keV. The MACS extracted in the present work at 30 keV is 34.6 +/- 0.6stat +/- 1.8sys mb, in agreement with latest results and evaluations, but 11% lower relative to compilation of astrophysical interest. When included in models of the s-process nucleosynthesis in massive stars, this change results in a 60% increase of the abundance of this isotope, with a negligible propagation on heavier species. The reason is that using both the old or the new MACS, 58Ni is efficiently depleted by neutron captures.
JRC Directorate:Health, Consumers and Reference Materials

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