EPJ Web Conf.
Volume 260, 2022The 16th International Symposium on Nuclei in the Cosmos (NIC-XVI)
|Number of page(s)||3|
|Published online||24 February 2022|
Investigation of the 7Li(p,n) neutron ﬁelds at high energies
1 Goethe-Universität Frankfurt, Max-von-Laue-Str. 1, 60438 Frankfurt, Germany
2 Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany
3 FH Aachen, Heinrich-Mußmann-Straße 1, 52428 Jülich, Germany
4 University of Notre Dame, 46556 Indiana, USA
* e-mail: email@example.com
Published online: 24 February 2022
The neutron activation method is well-suited to investigate neutron-capture cross sections relevant for the main s-process component. Neutrons can be produced via the 7Li(p,n) reaction with proton energies of 1912 keV at e.g. Van de Graaff accelerators, which results in a quasi-Maxwellian spectrum of neutrons corresponding to a temperature of kBT = 25 keV. However, the weak s-process takes place in massive stars at temperatures between 25 and 90 keV. Simulations using the PINO code  suggest that a Maxwellian spectrum for higher energies, e.g. kBT = 90 keV, can be approximated by a linear combination of different neutron spectra. To validate the PINO code at proton energies Ep ≠ 1912 keV, neutron time-of-ﬂight measurements were carried out at the PTB Ion Accelerator Facility (PIAF) at the Physikalisch-Technische Bundesanstalt in Braunschweig, Germany.
© The Authors, published by EDP Sciences, 2022
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