Energy-broadened proton beam for production of quasi-stellar neutrons from the 7Li(p,n)7Be reaction

G. Feinberg*, A. Shor, D. Berkovits, Y. Eisen, M. Friedman, G. Giorginis, T. Hirsh, A. Krása, M. Paul, A. Plompen, E. Tsuk

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

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Production of quasi-stellar neutrons by the 7Li(p,n) 7Be reaction has been used for measuring s-process cross sections and efforts to upgrade the proton beam intensity with RF linear accelerators are presently ongoing. We investigated the effect of an energy-broadened proton beam, as is expected for a RF linear accelerator, on the produced 25-keV quasi-Maxwellian neutron spectrum and compared it to that of a Van de Graaff accelerator with well-defined proton energy. Neutron spectrum measurements from 0° to 80° were carried out with a pulsed proton beam at the IRMM Van de Graaff accelerator using time-of-flight techniques, both with a narrow energy spread (σ≈1.5 keV) proton beam and with an energy-broadened beam (σ≈20 keV) obtained by straggling through a Au-foil degrader. In the latter case, the neutron spectrum is closer to the Maxwellian flux distribution in the high neutron energy region.

Original languageAmerican English
Article number012044
JournalJournal of Physics: Conference Series
Issue number1
StatePublished - 2012
Event5th Bi-Annual Nuclear Physics in Astrophysics, NPA5 - Eilat, Israel
Duration: 3 Apr 20118 Apr 2011


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