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dc.contributor.authorNetterdon, L.
dc.contributor.authorEndres, A.
dc.contributor.authorKiss, G. G.
dc.contributor.authorMayer, J.
dc.contributor.authorRauscher, T.
dc.contributor.authorScholz, P.
dc.contributor.authorSonnabend, K.
dc.contributor.authorTörök, Zs
dc.contributor.authorZilges, A.
dc.date.accessioned2014-10-21T14:44:30Z
dc.date.available2014-10-21T14:44:30Z
dc.date.issued2014-09-25
dc.identifier.citationNetterdon , L , Endres , A , Kiss , G G , Mayer , J , Rauscher , T , Scholz , P , Sonnabend , K , Török , Z & Zilges , A 2014 , ' Cross-section measurement of the Ba 130 (p,γ) La 131 reaction for γ -process nucleosynthesis ' , Physical Review C , vol. 90 , no. 3 , 035806 . https://doi.org/10.1103/PhysRevC.90.035806
dc.identifier.issn2469-9985
dc.identifier.otherPURE: 7686953
dc.identifier.otherPURE UUID: 3fe874d0-400d-4823-ba34-53150228e7f6
dc.identifier.otherScopus: 84907494083
dc.identifier.urihttp://hdl.handle.net/2299/14603
dc.description.abstractBackground: Deviations between experimental data of charged-particle-induced reactions and calculations within the statistical model are frequently found. An extended data base is needed to address the uncertainties regarding the nuclear-physics input parameters in order to understand the nucleosynthesis of the neutron-deficient p nuclei. Purpose: A measurement of total cross-section values of the Ba130(p,γ)La131 reaction at low proton energies allows a stringent test of statistical model predictions with different proton+nucleus optical model potentials. Since no experimental data are available for proton-capture reactions in this mass region around A ≈130, this measurement can be an important input to test the global applicability of proton+nucleus optical model potentials. Method: The total reaction cross-section values were measured by means of the activation method. After the irradiation with protons, the reaction yield was determined by use of γ-ray spectroscopy using two clover-type high-purity germanium detectors. In total, cross-section values for eight different proton energies could be determined in the energy range between 3.6 MeV ≤Ep≤ 5.0 MeV, thus, inside the astrophysically relevant energy region. Results: The measured cross-section values were compared to Hauser-Feshbach calculations using the statistical model codes TALYS and SMARAGD with different proton+nucleus optical model potentials. With the semimicroscopic JLM proton+nucleus optical model potential used in the SMARAGD code, the absolute cross-section values are reproduced well, but the energy dependence is too steep at the lowest energies. The best description is given by a TALYS calculation using the semimicroscopic Bauge proton+nucleus optical model potential using a constant renormalization factor. Conclusions: The statistical model calculation using the Bauge semimicroscopic proton+nucleus optical model potential deviates by a constant factor of 2.1 from the experimental data. Using this model, an experimentally supported stellar reaction rate for proton capture on the p nucleus Ba130 was calculated. At astrophysical temperatures, an increase in the stellar reaction rate of 68% compared to rates obtained from the widely used NON-SMOKER code is found. This measurement extends the scarce experimental data base for charged-particle-induced reactions, which can be helpful to derive a more globally applicable proton+nucleus optical model potential.en
dc.language.isoeng
dc.relation.ispartofPhysical Review C
dc.rightsOpen
dc.titleCross-section measurement of the Ba 130 (p,γ) La 131 reaction for γ -process nucleosynthesisen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2014-09-25
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1103/PhysRevC.90.035806
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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