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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F14%3A10283694%21RIV15-MSM-11320___
rdf:type
n6:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.1103/PhysRevC.89.014605
dcterms:description
The Ni-58(n,gamma) cross section has been measured at the neutron time of flight facility n_TOF at CERN, in the energy range from 27 meV up to 400 keV. In total, 51 resonances have been analyzed up to 122 keV. Maxwellian averaged cross sections (MACS) have been calculated for stellar temperatures of kT = 5-100 keV with uncertainties of less than 6%, showing fair agreement with recent experimental and evaluated data up to kT = 50 keV. The MACS extracted in the present work at 30 keV is 34.2 +/- 0.6(stat) +/- 1.8(sys) mb, in agreement with latest results and evaluations, but 12% lower relative to the recent KADoNIS compilation of astrophysical cross sections. When included in models of the s-process nucleosynthesis in massive stars, this change results in a 60% increase of the abundance of Ni-58, with a negligible propagation on heavier isotopes. The reason is that, using both the old or the new MACS, Ni-58 is efficiently depleted by neutron captures. The Ni-58(n,gamma) cross section has been measured at the neutron time of flight facility n_TOF at CERN, in the energy range from 27 meV up to 400 keV. In total, 51 resonances have been analyzed up to 122 keV. Maxwellian averaged cross sections (MACS) have been calculated for stellar temperatures of kT = 5-100 keV with uncertainties of less than 6%, showing fair agreement with recent experimental and evaluated data up to kT = 50 keV. The MACS extracted in the present work at 30 keV is 34.2 +/- 0.6(stat) +/- 1.8(sys) mb, in agreement with latest results and evaluations, but 12% lower relative to the recent KADoNIS compilation of astrophysical cross sections. When included in models of the s-process nucleosynthesis in massive stars, this change results in a 60% increase of the abundance of Ni-58, with a negligible propagation on heavier isotopes. The reason is that, using both the old or the new MACS, Ni-58 is efficiently depleted by neutron captures.
dcterms:title
Experimental neutron capture data of Ni-58 from the CERN n_TOF facility Experimental neutron capture data of Ni-58 from the CERN n_TOF facility
skos:prefLabel
Experimental neutron capture data of Ni-58 from the CERN n_TOF facility Experimental neutron capture data of Ni-58 from the CERN n_TOF facility
skos:notation
RIV/00216208:11320/14:10283694!RIV15-MSM-11320___
n3:aktivita
n16:P n16:I
n3:aktivity
I, P(LG13031)
n3:cisloPeriodika
1
n3:dodaniDat
n15:2015
n3:domaciTvurceVysledku
n12:6949045 n12:4987020 n12:7876009 n12:1983601
n3:druhVysledku
n13:J
n3:duvernostUdaju
n10:S
n3:entitaPredkladatele
n20:predkladatel
n3:idSjednocenehoVysledku
15879
n3:idVysledku
RIV/00216208:11320/14:10283694
n3:jazykVysledku
n19:eng
n3:klicovaSlova
flux; science; technology; nucleosynthesis; nuclear-data; radiative-capture; massive stars; cross-sections
n3:klicoveSlovo
n7:nucleosynthesis n7:radiative-capture n7:flux n7:technology n7:cross-sections n7:nuclear-data n7:science n7:massive%20stars
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[73C9AA30BE88]
n3:nazevZdroje
Physical Review C - Nuclear Physics
n3:obor
n18:BG
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
101
n3:projekt
n9:LG13031
n3:rokUplatneniVysledku
n15:2014
n3:svazekPeriodika
89
n3:tvurceVysledku
Domingo-Pardo, C. Boccone, V. Ferrari, A. Carrapico, C. Chiaveri, E. Cortes-Giraldo, M. A. Bosnar, D. Fraval, K. Valenta, Stanislav Billowes, J. Calvino, F. Zugec, P. Bečvář, František Brugger, M. Colonna, N. Cerutti, F. Altstadt, S. Diakaki, M. Eleftheriadis, C. Becares, V. Cortes, G. Krtička, Milan Barbagallo, M. Kroll, Jiří Duran, I. Berthoumieux, E. Cano-Ott, D. Dzysiuk, N. Calviani, M. Audouin, L. Belloni, F. Andrzejewski, J. Chin, M.
n3:wos
000332151100002
s:issn
0556-2813
s:numberOfPages
12
n14:doi
10.1103/PhysRevC.89.014605
n17:organizacniJednotka
11320