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Characterising the neutron and gamma responses of the NPL liquid scintillation spectrometers.

Hawkes, N P (2014) Characterising the neutron and gamma responses of the NPL liquid scintillation spectrometers. NPL Report. IR 33

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Abstract

Neutron and gamma responses for the smaller of NPL's two liquid scintillation spectrometers were calculated using the programs NRESP7 and PHRESP. The light output and resolution functions required for these calculations were derived from measurements made earlier at various energies in the ranges 1.2 - 15 MeV for neutrons and 0.28 - 1.8 MeV for gammas, together with additional measurements of the proton light output function between 0.9 and 6.4 MeV. Response matrices for this detector were then generated using responses calculated at closely spaced energies. Finally, pulse height spectra from both spectrometers were unfolded to derive energy spectra in cases where the true energy spectra were known, and the results assessed.

Item Type: Report/Guide (NPL Report)
NPL Report No.: IR 33
Keywords: Spectrometer, organic liquid scintillator, pulse shape discrimination, response matrix, unfolding
Subjects: Ionising Radiation
Ionising Radiation > Neutron Metrology
Last Modified: 02 Feb 2018 13:13
URI: http://eprintspublications.npl.co.uk/id/eprint/6251

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