Publisher’s Note: Investigation ofα-induced reactions on127I for the astrophysicalγprocess [Phys. Rev. C86, 035801 (2012)]

Experimental study of the astrophysicalγ-process reactionXe124(α,γ)BaHalász1, Somorjai2, Gyürky3 et al. 2016Phys. Rev. CSelf Cite160170View full textAdd to dashboardCite

“…Due to the endothermic nature of 124 Xe(α,n) 127 Ba this strongly affects the resulting cross sections in the measured energy range. (Similar problems due to incomplete sets of experimentally determined excited states were also discussed in [24,57].) In the present work, the incomplete set of excited states was neglected in the SMARAGD calculations and instead the nuclear level density of [58] with the parity distribution of [59] was used above the ground state.…”

Measurement of alpha-induced reaction cross sections on erbium isotopes for γ process studies

“…This approach provides more relevant astrophysical information than the direct study of the γ-induced reactions since often the in uence of thermally excited states is smaller in this direction, compared to photon-induced reactions [1,5,6,7]. In recent years several α-capture cross sections have been measured using the well-known activation technique [8,9,10,11,12,13,14,15,16,17], and the results were compared with the H-F predictions [18].…”

“…Both detectors are equipped with multilayer shielding to suppress the laboratory background. The low yields measured in the present work necessitated the use of small source-to-detector distances, therefore to determine the detector ef ciency the approach discussed in detail in [16,17] was used. At rst the absolute detector ef ciency was measured in far geometry: at 10 cm distance from the surface of the detector, using calibrated 57 Co, 60 Co, 133 Ba, 137 Cs, 152 Eu, and 241 Am sources with the HPGe detector, and 133 Ba, 152 Eu, and 241 Am sources with the LEPS detector.…”

“…Only targets with Zr contamination below 4% was used. The absolute number of target atoms and contaminants and the uniformity of the targets was determined -similarly to [16,17] -using the PIXE technique.…”

Absolute cross sections of the86Sr(α,n)89Zr reaction at energies of astrophysical interest

“…Unfortunately, due to the lack of experimental data, description of the γ process relies heavily on theoretical reaction rates, which typically have large uncertainties. For p-nuclei, theoretical predictions are traditionally based on the Hauser-Feshbach statistical model [8,9], which either overestimates [5,6,[10][11][12][13][14][15][16][17][18][19][20][21][22][23] or underestimates [5, 6, 10, 15-17, 19-22, 24, 25] the experimental cross sections. In order to reduce these uncertainties, additional experimental data is needed.…”