α- and neutron-induced reactions on ruthenium isotopes

Details α- and neutron-induced reactions on ruthenium isotopes α- and neutron-induced reactions on ruthenium isotopes

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002phrvc..66a5803r&link_type=abstract

Physical Review C, vol. 66, Issue 1, id. 015803

Other

23

Abundances, Chemical Composition, Nucleon-Induced Reactions, Nucleosynthesis In Novae, Supernovae, And Other Explosive Environments, 90<=A<=149

Scientific paper

The uncertain origin of the proton rich Mo and Ru isotopes has motivated cross-section measurements of α- and neutron-induced reactions. The experiments were performed via the activation technique by irradiating thin layers of natural ruthenium with α-particle beams close to the Gamov window of the p process between 7.0 and 10.5 MeV. The cross sections of the reactions 96Ru(α,γ), 96Ru(α,n), 96Ru(α,p), and 98Ru(α,n) could be determined with uncertainties of typically 10%. On average, these results are about two to three times smaller than recent statistical model predictions. Additional activations in a quasistellar neutron spectrum corresponding to kT=25 keV allowed us to obtain the complementary stellar (n,γ) cross sections for 96Ru, 102Ru, and 104Ru. In these cases the agreement with model calculations is considerably better.

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