New Experimental Proposal for<sup>235</sup>U PFNS Measurement to Answer a Fifty Year Old Question

Kornilov, N.; Massey, T. N.; Grimes, S. M.; Voinov, A.

doi:10.1520/stp49652t

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2017

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“…The following additional measurements were made with the neutron detectors looking directly at the source: (1) PH and TOF spectra from D(d,n) (E = 7,8,9,10 MeV) and T(d,n) (E = 14.9 MeV) reactions were used to verify the DYnamic THreshold (DYTH) method [10]; (2) Neutron spectra from the Al(d,n) reaction (E d = 7.44 MeV) were used to estimate light output for protons; (3) Neutron spectra from a 252 Cf (sf) source were used for efficiency estimation for the energy range <10 MeV. The 252 Cf standard data were taken from [11].…”

Section: Experimental Methodsmentioning

confidence: 99%

A high precision n-p scattering measurement at 14.9 MeV

et al. 2017

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Abstract. The n-p scattering angular distribution was measured with 14.9 MeV incident neutrons using the traditional time-of-flight technique with neutron-gamma discrimination. The scattering angle varied from 20 o to 65 o (laboratory system) in 5 o incremental steps. The efficiency of the neutron detectors was measured in the energy range 2-9 MeV relative to the 252 Cf-standard, and was calculated using Monte Carlo methods in the 2-14 MeV energy range. Two methods of analysis were applied for experimental and simulated data: a traditional approach with a fixed threshold, and a dynamic threshold approach. The present data agree with the ENDF/B-VII evaluation for the shape of n-p angular distribution within about 1.5%.

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Section: Experimental Methodsmentioning

confidence: 99%