Characterization of a 40-90 MeV 7Li(p,n) neutron source at TIARA using a proton recoil telescope and a TOF method

Details Characterization of a 40-90 MeV 7Li(p,n) neutron source at TIARA using a proton recoil telescope and a TOF method Characterization of a 40-90 MeV 7Li(p,n) neutron source at TIARA using a proton recoil telescope and a TOF method

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999nimpa.428..454b&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 428, Issue 2-3, p. 454-465.

Physics

19

Scientific paper

The intensity and energy spectra of a quasi-monoenergetic 7Li(p,n) neutron source at TIARA of Japan Atomic Energy Research Institute (JAERI) have been measured for eight incident proton energies between 43 and 87MeV, using a proton recoil telescope (PRT) of annular geometry and a time-of-flight (TOF) method employing organic scintillators (BC501A, NE213) calibrated prior to the experiment. By combining the two data, we deduced energy spectra of the source neutrons absolutely down to a few MeV, and the cross section of the peak neutron production reaction, 7Li(p,n0,1)7Be. The continuum component of the energy spectrum in the source proved to be described consistently by assuming a three-body phase-space distribution corresponding to the 7Li(p,n3He)α reaction as a main component. The annular PRT achieved a good compromise between energy resolution and detection efficiency with a good signal-to-noise ratio.

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