dc.contributor.author | Netterdon, L. | |
dc.contributor.author | Endres, A. | |
dc.contributor.author | Kiss, G. G. | |
dc.contributor.author | Mayer, J. | |
dc.contributor.author | Rauscher, T. | |
dc.contributor.author | Scholz, P. | |
dc.contributor.author | Sonnabend, K. | |
dc.contributor.author | Török, Zs | |
dc.contributor.author | Zilges, A. | |
dc.date.accessioned | 2014-10-21T14:44:30Z | |
dc.date.available | 2014-10-21T14:44:30Z | |
dc.date.issued | 2014-09-25 | |
dc.identifier.citation | Netterdon , 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 (nuclear physics) , vol. 90 , no. 3 , 035806 . https://doi.org/10.1103/PhysRevC.90.035806 | |
dc.identifier.issn | 2469-9985 | |
dc.identifier.uri | http://hdl.handle.net/2299/14603 | |
dc.description.abstract | Background: 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.format.extent | 313587 | |
dc.language.iso | eng | |
dc.relation.ispartof | Physical Review C (nuclear physics) | |
dc.title | Cross-section measurement of the Ba 130 (p,γ) La 131 reaction for γ -process nucleosynthesis | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Science & Technology Research Institute | |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1103/PhysRevC.90.035806 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |