Thu·Apr 30, 2015Thursday·April 30, 2015

1. 01*

   The 106Cd(alpha,alpha)106Cd elastic scattering in a wide energy range for gamma-process studies

   A. Ornelas🇭🇺 · G. G. Kiss🇭🇺 · P. Mohr🇭🇺 · D. Galaviz🇵🇹 · Zs. Fülöp🇭🇺 · Gy. Gyürky🇭🇺 · Z. Máté · T. Rauscher🇬🇧 · E. Somorjai🇭🇺 · K. Sonnabend🇩🇪 · A. Zilges🇩🇪

   Alpha elastic scattering angular distributions of the 106Cd(alpha,alpha)106Cd reaction were measured at three energies around the Coulomb barrier to provide a sensitive test for the alpha + nucleus optical potential parameter sets. Furthermore, the new high precision angular distributions, together with the data available from the literature were used to study the energy dependence of the locally optimized {\alpha}+nucleus optical potential in a wide energy region ranging from E_Lab = 27.0 MeV down to 16.1 MeV. The potentials under study are a basic prerequisite for the prediction of alpha-induced reaction cross sections and thus, for the calculation of stellar reaction rates used for the astrophysical gamma process. Therefore, statistical model predictions using as input the optical potentials discussed in the present work are compared to the available 106Cd + alpha cross section data.

   nucl-exNPA(2015)·11 citations
2. 02*

   Measurements of ${}^{152}$Gd(p,$\gamma$)${}^{153}$Tb and ${}^{152}$Gd(p,n)${}^{152}$Tb reaction cross sections for the astrophysical $\gamma$ process

   R. T. Güray🇹🇷 · N. Özkan🇹🇷 · C. Yalçın🇭🇺 · T. Rauscher🇬🇧 · Gy. Gyürky🇭🇺 · J. Farkas🇭🇺 · Zs. Fülöp🇭🇺 · Z. Halász🇭🇺 · E. Somorjai🇭🇺

   The total cross sections for the ${}^{152}$Gd(p,$\gamma$)${}^{153}$Tb and ${}^{152}$Gd(p,n)${}^{152}$Tb reactions have been measured by the activation method at effective center-of-mass energies \mbox{$3.47\le E_{c.m.}^{\mathrm{eff}}\le 7.94$ MeV} and \mbox{$4.96\le E_{c.m.}^{\mathrm{eff}}\le 7.94$ MeV}, respectively. The targets were prepared by evaporation of 30.6\% isotopically enriched ${}^{152}$Gd oxide on aluminum backing foils, and bombarded with proton beams provided by a cyclotron accelerator. The cross sections were deduced from the observed $\gamma$-ray activity, which was detected off-line by a HPGe detector in a low background environment. The results are presented and compared with predictions of statistical model calculations. This comparison supports a modified optical proton+${}^{152}$Gd potential suggested earlier.

   nucl-exPRC(2015)·9 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.