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Response measurement of a Bonner sphere spectrometer for high-energy neutrons.

IEEE Trans. Nucl. Sci. 59, 161-166 (2012)
Open Access Green as soon as Postprint is submitted to ZB.
Response measurements of a Bonner sphere spectrometer (BSS) were performed for high-energy neutrons up to 400 MeV in quasi-monoenergetic neutron fields at Research Center for Nuclear Physics (RCNP), Osaka University. The quasi-monoenergetic neutron field was generated by injecting protons on to the Li target with the spectra consisting of a monoenergetic high-energy peak followed by an unwanted continuum tail down to the low energy region. Two-angle differential measurements were performed to obtain the monoenergetic response by subtracting the tail contribution. Discussions were made on data analysis for tail subtraction. While each Bonner sphere had different energy responses, good agreements were seen in the monoenergetic responses between the MCNPX calculation and the measurement with a suitable subtraction. Response calculations were also conducted for the whole spectra obtained by unfolding the measured BSS data and gave the results reproducing well the measured responses.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Accelerator facility; Bonner sphere spectrometer; energy measurement; high-energy neutrons; Li(p,n) reactions; mono-energetic neutrons; neutron spectrometer; neutrons; particle beams; radiation detectors; radiation safety
Reviewing status