KENS keV neutron flux for nuclear astrophysics

Details KENS keV neutron flux for nuclear astrophysics KENS keV neutron flux for nuclear astrophysics

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999nimpa.423..404n&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 423, Issue 2-3, p. 404-413.

Physics

1

Scientific paper

A fast (keV) neutron is a unique probe for studying important problems on nuclear astrophysics as well as on nuclear physics, and the neutron is produced by several reactions such as nucleon exchange reaction, photo-nuclear reaction, and spallation reaction. Among the neutrons produced by these reactions the spallation neutron has characteristic features such as a white energy spectrum and a well collimated beam. In this study, the neutron flux of the spallation neutron source (KENS) was measured from thermal energy to 90keV: the flux at 30keV is about 12n/(cm2s eV) at a sample position 7.34m from the water moderator for the proton beam current of 5μA, comparable to the flux obtained by the 7Li(p,n)7Be reaction for the proton beam current of 10μA at a sample position 12cm from the 7Li target. The measured flux was compared to a calculated one using a Monte-Carlo code.

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