p-process nucleosynthesis via proton-capture reactions in thermonuclear supernovae explosions

  • Model calculations within the framework of the so-called γ process show an underproduction of the p nucleus with the highest isotopic abundace 92Mo. This discrepancy can be narrowed by taking into account the alternative production site of a type Ia supernova explosion. Here, the nucleus 92Mo can be produced by a sequence of proton-capture reactions. The amount of 92Mo nuclei produced via this reaction chain is most sensitive to the reactions 90Zr(p,γ) and 91Nb(p,γ). Both rates have to be investigated experimentally to study the impact of this nucleosynthesis aspect on the long-standing 92Mo-problem. We have already measured the proton-capture reaction on 90Zr using high-resolution in-beam γ-ray spectroscopy. In this contribution, we will present our preliminary results of the total cross sections as well as the partial cross sections. Furthermore, we plan to measure the 91Nb(p,γ) reaction soon. Due to the radioactive target material, the 91Nb nuclei have to be produced prior to the experiment. The current status of this production will be presented in this contribution.

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Author:Anne EndresGND, Ceyhun Arda, Philipp ErbacherGND, Jan GloriusORCiDGND, Kathrin GöbelORCiDGND, Ole Djürko HinrichsGND, Emilio Mevius, Markus Reich, Kerstin SonnabendGND, Benedikt Thomas, Taniya Thomas
URN:urn:nbn:de:hebis:30:3-392612
URL:http://www.epj-conferences.org/articles/epjconf/abs/2015/12/epjconf_cgs2015_03007/epjconf_cgs2015_03007.html
Parent Title (English):The European physical journal. Web of Conferences, 93.2015, 03007
Publisher:EDP Sciences
Place of publication:Les Ulis
Document Type:Conference Proceeding
Language:English
Date of Publication (online):2015/05/28
Date of first Publication:2015/05/28
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2016/02/09
Volume:93
Issue:03007
Page Number:4
HeBIS-PPN:372724337
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung 4.0