The construction and calibration of a standard thermal neutron flux facility at the national physical laboratory

An investigation of the neutron flux in bone-fluorine phantoms comparing accelerator based in vivo neutron activation analysis and FLUKA simulation data

“…This is not surprising: FLUKA has been used in several studies and is validated by various experiments [33][34][35][36]. We matched the FLUKA data to experimental results obtained via fairly standard methodology of measurements of neutron fluxes using Mn activation foils as has been performed in multiple studies [23,21,22,43,42,41], and often around accelerators which have been used as a neutron source for therapy purposes [28,13,8,39,27]. We suggest that the match in this instance is remarkably good, given that we were using neutron production rates derived at another centre.…”

Thermal neutron cross-section and resonance integral of the 186W(n,γ)187W reaction

“…where E r effective resonance energy (eV), as defined by Ryves [19,20], the term (I 0 À 0.426gr 0 ) represents the reduced resonance integral, i.e. with the 1/v tail subtracted by a factor of 0:426 ffi 2 Á ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi E th =E Cd p…”

Progress in providing neutron standards at the UK National Physical Laboratory

“…A beam of deuterons bombards two beryllium targets, set into a large graphite moderator or pile, and the thermal neutron field near the centre of the pile is kept stable and uniform by a feedback system based on signals from three ionisation chambers within the graphite [10].…”