Photodisintegration studies on p-nuclei: The case of Mo and Sm isotopes

Abstract

In explosive stellar environments like supernovae, the temperatures are high enough for the production of heavy neutron-deficient nuclei, the socalled p-nuclei. Up to now, the knowledge of the reaction rates of p-nuclei is based on theoretical parameterizations using statistical model calculations. At the bremsstrahlung facility of the superconducting electron accelerator ELBE of FZ Dresden-Rossendorf, we aim to measure the photodisintegration rates of heavy nuclei experimentally. Photoactivation measurements on the astrophysically relevant p-nuclei 92Mo and 144Sm have been performed with bremsstrahlung end-point energies from 10.0 to 16.5 MeV. First experiments on the short-lived decays following the reaction 144Sm(gamma,n) are carried out using a pneumatic delivery system for rapid transport of activated samples. The activation yields are compared with calculations using cross sections from recent Hauser-Feshbach models.

arXiv comment6 pages, 3 figures

References in corpus (4)

• The ^{144}Sm-αoptical potential at astrophysically relevant energies derived from ^{144}Sm(α,α)^{144}Sm elastic scattering
• Predicted cross sections for photon-induced particle emission
• Photon-induced Nucleosynthesis: Current Problems and Experimental Approaches
• Photodissociation of p-process nuclei studied by bremsstrahlung induced activation

Cited by in corpus (8)

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• Photoactivation experiment on 197Au and its implications for the dipole strength in heavy nuclei
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• High precision ${}^{113}$In($\alpha ,\alpha$)${}^{113}$In elastic scattering at energies around the Coulomb barrier for the astrophysical $\gamma$ process
• Feasibility of studying astrophysically important charged-particle emission with the variable energy $\gamma$-ray system at the Extreme Light Infrastructure -- Nuclear Physics facility