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HK: Fachverband Physik der Hadronen und Kerne

HK 18: Nukleare Astrophysik I

HK 18.3: Vortrag

Dienstag, 22. März 2011, 14:45–15:00, HS3

Simulation of the ⁷Li(p, n)⁷Be reaction — •Stefan Schmidt, Oliver Meusel, and Rene Reifarth — Goethe-Universität Frankfurt, Max-von-Laue-Straße 1

The neutron spectrum of the ⁷Li(p, n) reaction has long been used as an approximation to the thermal neutron distribution in Red Giant stars. The angle-integrated spectrum approximating the Maxwellian distribution at 25 keV very well can be used to investigate neutron capture cross sections. It is well understood and simulation tools agree with the measurements. However, future projects continuing the work of Karlsruhe Institute of Technology (KIT, formerly FZK) require more in-depth knowledge of the resulting neutrons. To provide this information, a simulation tool has been developed that works with six-dimensional proton input to generate six-dimensional neutron output. Its results agree very well with angle-dependent measurements conducted at KIT and Physikalisch-Technische Bundesanstalt, thus it allows analyzing the dependency of the neutron spectrum on the proton input and helps to study effects like phase space occupation.