18–23 Jun 2017
Laboratori Nazionali del Sud
Europe/Rome timezone

Study of nuclear physics input-parameters via high-resolution $\gamma$-ray spectroscopy

23 Jun 2017, 11:40
20m
Aula magna (Dipartimento di Fisica e Astronomia)

Aula magna

Dipartimento di Fisica e Astronomia

Speaker

Mr Philipp Scholz (Institut für Kernphysik, Universität zu Köln, Cologne, Germany)

Description

% % Nuclear Physics in Astrophysics 8 template for abstract % % Format: LaTeX2e. % % Rename this file to name.tex, where `name' is the family name % of the first author, and edit it to produce your abstract. % \documentstyle[11pt]{article} % % PAGE LAYOUT: % \textheight=9.9in \textwidth=6.3in \voffset -0.85in \hoffset -0.35in \topmargin 0.305in \oddsidemargin +0.35in \evensidemargin -0.35in %\renewcommand{\rmdefault}{ptm} % to use Times font \long\def\TITLE#1{{\Large{\bf#1}}}\long\def\AUTHORS#1{ #1\\[3mm]} \long\def\AFFILIATION#1#2{$^{#1}\,$ #2\\} \begin{document} {\small \it Nuclear Physics in Astrophysics 8, NPA8: 18-23 June 2017, Catania, Italy} \vspace{12pt} \thispagestyle{empty} \begin{center} %%% %%% Title goes here. %%% \TITLE{Study of nuclear physics input-parameters via high-resolution $\gamma$-ray spectroscopy}\\[3mm] %%% %%% Authors and affiliations are next. The presenter should be %%% underlined as shown below. %%% \AUTHORS{P. Scholz$^{1}$, F. Heim$^{1}$, J. Mayer$^{1}$, M. Spieker, and A. Zilges$^1$ } %%% {\small \it \AFFILIATION{1}{Institute for Nuclear Physics, University of Cologne} } %%% \vspace{12pt} % Do not modify % Enter contact e-mail address here. \centerline{Contact email: {\it pscholz@ikp.uni-koeln.de}} \vspace{18pt} % Do not modify \end{center} %%% %%% Abstract proper starts here. %%% Nuclear reaction cross sections are one of the main ingredients for the understanding of nucleosynthesis processes in stellar environments. For isotopes heavier than those in the iron-peak region, reaction rates are often calculated using the Hauser-Feshbach statistical model. The accuracy of the predicted cross sections strongly depend on the uncertainties of the nuclear-physics input-parameters. These are nuclear-level densities, $\gamma$-strength functions, and particle+nucleus optical-model potentials. The precise measurement of total and partial reaction cross sections at sub-Coulomb energies and their comparison to statistical model calculations are used to constrain or exclude different nuclear-physics models. This talk is going to introduce experimental methods and present recent experiments performed at the Cologne 10 MV FN-Tandem accelerator and the high-efficiency HORUS $\gamma$-ray spectrometer. Results for cross-section measurements of $\alpha$ induced reactions on the $p$ nucleus $^{108}$Cd [1] and the $^{85}$Rb(p,$\gamma$) reaction will be presented. In addition, preliminary results of $\gamma$-strength function studies applying the method of two-step cascades [2] for the reactions $^{92}$Mo(p,$\gamma\gamma$) and $^{63}$Cu(p,$\gamma\gamma$) will be shown.\newline Supported by the DFG (ZI 510/8-1) and the "ULDETIS" project within the UoC Excellence Initiative institutional strategy. PS and JM are supported by the Bonn-Cologne Graduate School of Physics and Astronomy. \bigskip {\small \noindent [1] P. Scholz \textit{et al.}, Phys. Lett. B \textbf{761} (2016) 247. \newline \noindent [2] F. Be\u{c}v\'{a}\u{r} \textit{et al.}, Phys. Rev. C \textbf{46} (1992) 1276. } %%% %%% End of abstract. %%% \end{document}

Primary author

Mr Philipp Scholz (Institut für Kernphysik, Universität zu Köln, Cologne, Germany)

Co-authors

Prof. Andreas Zilges (University of Cologne) Mr Felix Heim (Institute for Nuclear Physics, University of Cologne) Mr Jan Mayer (Institute for Nuclear Physics, University of Cologne) Mr Mark Spieker (Institute for Nuclear Physics - University of Cologne)

Presentation materials

There are no materials yet.