Münster 2017 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 42: Nuclear Astrophysics III
HK 42.4: Vortrag
Donnerstag, 30. März 2017, 15:00–15:15, F 33
Screening effects for nuclear reactions of astrophysical interest in laser-generated plasmas — •Yuanbin Wu and Adriana Pálffy — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany
Due to screening effects, nuclear reactions in astrophysical plasmas may behave differently than in the laboratory. At the upcoming ELI-NP facility with 10 PW lasers, an experimental setup where two laser beams generate two colliding plasmas is envisaged [1]. In this experimental setup, a laser pulse interacting on a solid target produces a plasma through the Target Normal Sheath Acceleration scheme, and then this rapidly streaming plasma (ion flow) interacts on a secondary plasma created by the interaction of a second laser pulse on a gas jet target. We model here this scenario and calculate the reaction events for the reaction 13C(4He,n)16O which is one of the main neutron sources for the s-process. We find that, with this experimental setup, it is possible to determine the plasma screening enhancement factor for fusion reactions, by detecting the difference of the reaction events between the two scenarios of ion flow interacting with the plasma target and the gas target. This will provide a tool to explore the nuclear reactions in stellar environments which could strongly contribute to the field of nuclear astrophysics.
[1] M. Roth et al. (eds.), Laser driven nuclear physics at ELI-NP – technical design report, 2015.