Nuclei in the Cosmos XV

First radiative proton capture cross-section measurements on 107,109-Ag and 112-Cd relevant to the p-process

26 giu 2018, 19:00

1O 30m

"E. Fermi" conference room (LNGS)

Poster Poster session

Relatore

Athanasios Psaltis (McMaster University)

Descrizione

One of the important, but still unsettled topics in Nuclear Astrophysics is the production of the p-nuclei [1,2]. The p-process relies on an extended reaction network, which can be described theoretically by the Hauser-Feshbach statistical model, which in turn relies strongly on experimental data. To provide reliable data for p-nuclei, an experimental campaign at the Tandem Accelerator Laboratory of NCSR ``Demokritos'', focusing on measurements of cross-sections in the 107,109-Ag(p,γ)108,110-Cd [3] and 112-Cd(p,γ)113-In [4] reactions was carried out. Both reactions were studied using a set of four HPGe detectors via the in-beam γ-ray spectroscopy, while for the latter the activation method was additionally employed to account for the population of a low-lying isomeric state. Total cross sections for proton beam energies lying inside the Gamow window for energies relevant to p-process nucleosynthesis were obtained for the first time. Experimental results are compared to Hauser-Feshbach calculations performed with the latest version of the TALYS code (v1.9) [5]. An overall good agreement has been achieved. These results provide important new input for the theoretical description of the p-process, but additionally for the origin of the cross-point p-nucleus 113-In. References [1] M. Arnould and S. Goriely, Phys. Rep. 384, 1 (2003) [2] T. Rauscher et al., Rep. Prog. Phys. 76, 066201 (2013) [3] A. Khaliel et al., Phys. Rev. C 96, 035806 (2017) [4] A. Psaltis et al. (2018), in prep. [5] A. Koning, S. Hilaire and S. Goriely, TALYS-1.9, A Nuclear Reaction Program, NRG-1755 ZG Petten, The Netherlands (2017)

Materiali di presentazione

Abstract

35_PsaltisAthanasios.pdf