62Ni(n, gamma) and 63Ni(n, gamma) cross sections measured at the n_TOF facility at CERN

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Title:	62Ni(n, gamma) and 63Ni(n, gamma) cross sections measured at the n_TOF facility at CERN
Authors:	LEDERER C.; MASSIMI C.; BERTHOUMIEUX E.; COLONNA N.; DRESSLER R.; GUERRERO C.; GUNSING F.; KÄPPELER F.; KIVEL Niko; PIGNATARI M.; REIFARTH R.; SCHUMANN D.; WALLNER A.; ANDRIAMONJE S.; ANDRZEJEWSKI J.; AUDOUIN L.; Becvár F.; CALVINO F.; CANO-OTT D.; CORTES G.; DOMINGO-PARDO C.; DURAN I.; ELEFTHERIADIS C.; FERRARI A.; GONCALVES I.; GONZALEZ-ROMERO E.; GRIESMAYER E.; JERICHA E.; KADI Y.; KARADIMOS D.; KRTICKA M.; LEEB H.; MARGANIEC J.; MASTINU P.; MENGONI A.; MILAZZO P. M.; PARADELA C.; PAVLIK A.; PLOMPEN Arjan; QUESADA J.; RAUSCHER T.; RUBBIA C.; TAGLIENTE G.; TAIN J. L.; TASSAN-GOT L.; VANNINI G.; VAZ P.; VENTURA A.; VLASTOU R.; BECARES V.; BILLOWES J.; BOCCONE V.; BOSNAR D.; BRUGGER M.; CARRAPICO C.; CERUTTI F.; CHIN M.; CORTES-GIRALDO M. A.; DZYSIUK N.; FRAVAL K.; GARCIA A. R.; GIUBRONE G.; GOMEZ-HORNILLOS M. B.; JENKINS D. G.; TARRIO D.; VALENTA S.; VARIALE V.; VERSACI R.; VERMEULEN M.; WARE T.; WEIGAND M.; WRIGHT T. J.; ZUGEC P.; BARBAGALLO M.; ALTSTADT S.; BELLONI F.; BERTHIER B.; CALVIANI M.; CHIAVERI E.; LANGER C.; LEONG L. S.; LOSITO R.; GANESAN S.; MANOUSOS A; MARTINEZ T.; MASTROMARCO M.; MEAZE M.; MENDOZA E.; MINGRONE F.; MIREA M.; MONDELAERS Willy; PERKOWSKI J.; PRAENA J.; RIEGO A.; ROMAN F.; SARMENTO R.; SCHILLEBEECKX Peter; SCHMIDT S.; Dillmann I; FERNANDEZ-ORDONEZ M.; GRAMEGNA F.; HARRISOPULOS S.; HEIL M.; IOANNIDES K.; KORSCHINEK G.; LEBBOS E.; LOZANO M.; MARRONE S.; PLAG R.; TSINGANIS A.; TLUSTOS L.; VLACHOUDIS V.; WEISS C.; KROLL J.; GURUSAMY P.
Citation:	PHYSICAL REVIEW C vol. 89 no. 2 p. 025810
Publisher:	AMER PHYSICAL SOC
Publication Year:	2014
JRC N°:	JRC87297
ISSN:	0556-2813
URI:	http://link.aps.org/doi/10.1103/PhysRevC.89.025810 http://dx.doi.org/10.1103/PhysRevC.89.025810 http://publications.jrc.ec.europa.eu/repository/handle/JRC87297
DOI:	10.1103/PhysRevC.89.025810
Type:	Articles in periodicals and books
Abstract:	The cross section of the 62Ni(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 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 63Ni(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.
JRC Directorate:	Health, Consumers and Reference Materials

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