학술논문
Activation measurements of neutron capture cross sections at various temperatures.
Document Type
Article
Author
Heftrich, Tanja; Weigand, Mario; Al-Khasawleh, Kafa; Brückner, Benjamin; Dellmann, Sophia; Dogan, Ozan Can; El Mard, Asmaa; Erbacher, Philipp; Habermehl, Fabian; Heybeck, Benedict; Gail, Madeleine Margaux; Göbel, Kathrin; Kisselbach, Timo; Kurtulgil, Deniz; Reich, Markus; Reifarth, René; Sheriff, Silas; Volknandt, Meiko
Source
Subject
*NEUTRON capture
*NUCLEAR physics
*WAVELENGTHS
*HYDRODYNAMICS
*FLUID dynamics
*
*
*
*
Language
ISSN
2101-6275
Abstract
About 50% of the elements heavier than iron are produced during the slow neutron capture process. This process occurs in different stellar sites at various energies. To understand the ongoing nucleosynthesis, the probability of a neutron capture for different temperatures and therefore for different stellar sites is essential. Activation experiments using the 7Li(p,n) reaction as neutron source were performed. At a temperature of kBT = 25 keV the cross sections were determined for 27Al, 37Cl and 41K. A new method was developed to perform activation experiments at even lower temperatures. For a proof of principle, the cross section for 64Ni was measured at kBT = 25 keV as well as for kBT = 6 keV. To study the impact of isomeric states at higher energies, activations of 181Ta were performed using two different proton energies. [ABSTRACT FROM AUTHOR]