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Thermonuclear Ti-42(p, gamma)V-43 rate in type-I x-ray bursts
(2014-03-05)
The thermonuclear rate of the Ti-42(p, gamma)V-43 reaction has been reevaluated based on a recent precise proton separation energy measurement of S-p(V-43) = 83 +/- 43 keV. The astrophysical impact of our new rates has ...
Investigation of alpha-induced reactions on Ba-130 and Ba-132 and their importance for the synthesis of heavy p nuclei
(2012-02-17)
Captures of a particles on the proton-richest barium isotope, Ba-130, have been studied in order to provide cross-section data for the modeling of the astrophysical gamma process. The cross sections of the Ba-130(alpha,g ...
Reaction rate sensitivity of Ti-44 production in massive stars and implications of a thick target yield measurement of Ca-40(alpha, gamma)Ti-44
(2010-06-01)
We evaluate two dominant nuclear reaction rates and their uncertainties that affect Ti-44 production in explosive nucleosynthesis. Experimentally we develop thick target yields for the Ca-40(alpha, gamma)Ti-44 reaction at ...
Stellar (n,gamma) cross sections of p-process isotopes Part I: Pd-102, Te-120, Ba-130,Ba-132, and Dy-156
(2010-01)
We have investigated the (n,gamma) cross sections of p-process isotopes with the activation technique. The measurements were carried out at the Karlsruhe Van de Graaff accelerator using the Li-7(p, n) Be-7 source for ...
Odd p isotope In-113 : Measurement of alpha-induced reactions
(2009-06)
One of the few p nuclei with an odd number of protons is In-113. Reaction cross sections of In-113(alpha,gamma)Sb-117 and In-113(alpha,n)Sb-116 have been measured with the activation method at center-of-mass energies between ...
Experimental (n,gamma) cross sections of the p-process nuclei Se-74 and Sr-84
(2006-01)
The nucleosynthesis of elements beyond iron is dominated by the s and r processes. However, a small amount of stable isotopes on the proton-rich side cannot be made by neutron capture and are thought to be produced by ...
Predicted cross-sections for photon-induced particle emission
(2004-09)
Cross-sections for the photon-induced particle-emission reactions (gamma,n), (gamma,p), and (gamma,alpha) are given for all natural isotopes from Ti to Bi. The target nuclei are assumed to be in their ground states, except ...
The s-process branching at W-185
(2003-01-20)
The neutron capture cross section of the unstable nucleus W-185 has been derived from experimental photoactivation data of the inverse reaction W-186(gamma, n) W-185. The new result of sigma = 687 +/- 110 mbarn confirms ...
alpha- and neutron-induced reactions on ruthenium isotopes
(2002-07)
The uncertain origin of the proton rich Mo and Ru isotopes has motivated cross-section measurements of alpha- and neutron-induced reactions. The experiments were performed via the activation technique by irradiating thin ...