dc.contributor.author | Glorius, J. | |
dc.contributor.author | Sonnabend, K. | |
dc.contributor.author | Görres, J. | |
dc.contributor.author | Robertson, D. | |
dc.contributor.author | Knörzer, M. | |
dc.contributor.author | Kontos, A. | |
dc.contributor.author | Rauscher, T. | |
dc.contributor.author | Reifarth, R. | |
dc.contributor.author | Sauerwein, A. | |
dc.contributor.author | Stech, E. | |
dc.contributor.author | Tan, W. | |
dc.contributor.author | Thomas, T. | |
dc.contributor.author | Wiescher, M. | |
dc.date.accessioned | 2014-07-21T07:30:14Z | |
dc.date.available | 2014-07-21T07:30:14Z | |
dc.date.issued | 2014-06-30 | |
dc.identifier.citation | Glorius , J , Sonnabend , K , Görres , J , Robertson , D , Knörzer , M , Kontos , A , Rauscher , T , Reifarth , R , Sauerwein , A , Stech , E , Tan , W , Thomas , T & Wiescher , M 2014 , ' Experimental cross sections of Ho 165 (α,n) Tm 168 and Er 166 (α,n) Yb 169 for optical potential studies relevant for the astrophysical γ process ' , Physical Review C (nuclear physics) , vol. 89 , no. 6 , 065808 . https://doi.org/10.1103/PhysRevC.89.065808 | |
dc.identifier.issn | 2469-9985 | |
dc.identifier.other | RIS: urn:F853A65EC123B26D2E7A29AC8FD53F39 | |
dc.identifier.uri | http://hdl.handle.net/2299/13963 | |
dc.description.abstract | Background: Optical potentials are crucial ingredients for the prediction of nuclear reaction rates needed in simulations of the astrophysical γ process. Associated uncertainties are particularly large for reactions involving α particles. This includes (γ,α) reactions which are of special importance in the γ process. Purpose: The measurement of (α,n) reactions allows for an optimization of currently used α-nucleus potentials. The reactions Ho165(α,n) and Er166(α,n) probe the optical model in a mass region where γ process calculations exhibit an underproduction of p nuclei which is not yet understood. Method: To investigate the energy-dependent cross sections of the reactions Ho165(α,n) and Er166(α,n) close to the reaction threshold, self-supporting metallic foils were irradiated with α particles using the FN tandem Van de Graaff accelerator at the University of Notre Dame. The induced activity was determined afterwards by monitoring the specific β-decay channels. Results: Hauser-Feshbach predictions with a widely used global α potential describe the data well at energies where the cross sections are almost exclusively sensitive to the α widths. Increasing discrepancies appear towards the reaction threshold at lower energy. Conclusions: The tested global α potential is suitable at energies above 14 MeV, while a modification seems necessary close to the reaction threshold. Since the γ and neutron widths show non-negligible impact on the predictions, complementary data are required to judge whether or not the discrepancies found can be solely assigned to the α width. © 2014 American Physical Society. | en |
dc.format.extent | 8 | |
dc.format.extent | 412629 | |
dc.language.iso | eng | |
dc.relation.ispartof | Physical Review C (nuclear physics) | |
dc.title | Experimental cross sections of Ho 165 (α,n) Tm 168 and Er 166 (α,n) Yb 169 for optical potential studies relevant for the astrophysical γ process | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Science & Technology Research Institute | |
dc.contributor.institution | Centre for Astrophysics Research | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1103/PhysRevC.89.065808 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |