Neutron Spectrometry with EJ299-33 Plastic Scintillator for <formula formulatype="inline"><tex Notation="TeX">${E_n} = 10 \! - \! 100 ~\hbox{MeV}$</tex></formula>

Abstract

A neutron spectrometer based on a single EJ299-33 plastic scintillator ( cm diameter cm) is described. A digital implementation of pulse shape discrimination is used to separate events associated with neutrons from those associated with gamma-rays. Measurements made using a ns-pulsed neutron beam are used to produce response functions of the detector for neutrons over the energy range 10 -100 MeV. These lineshapes are used to test the capability of the spectrometer to produce neutron energy spectra, via the unfolding of pulse height spectra, for use in neutron fields having any type of time structure. The results are compared with those from a similar spectrometer constructed from EJ301 liquid scintillator.

The radiation environment over the African continent at aviation altitudes: first results of the RPiRENA-based dosimeter

“…Work is, however, underway locally in South Africa to account for the neutral component at flight altitudes through the development of a dedicated neutron detector (Buffler et al, 2015) that can be flown and operated independently alongside the silicon-based dosimeter discussed here in order to measure the dominant components of the complex radiation field at aviation altitudes.…”

The radiation environment over the African continent at aviation altitudes: First results of the RPiRENA-based dosimeter

“…At cruising altitudes it is believed that the radiation absorbed dose is dominated by the absorbed dose received from neutrons, generated as a result of the interactions of primary CRs with atmospheric molecules (Bartlett et al, 2002;Poje et al, 2015;Meier et al, 2020) and subsequently with the aircraft components (Knipp, 2017). Work is, however, underway locally in South Africa to account for the neutral component at flight altitudes through the development of a dedicated neutron detector (Buffler et al, 2015) that can be flown and operated independently alongside the silicon-based dosimeter discussed here in order to measure the dominant components of the complex radiation field at aviation altitudes.…”

Neutron transmission studies for concrete used in the nuclear industry

“…17 A pulse shape parameter S was then defined as (3) which is the basis of a charge comparison method of pulse shape discrimination. 18 Constants k and C were chosen in order to appropriately scale and offset S. Figure 2 shows distributions of events as a function of parameters L and S for two typical runs with Fig. 2(a) the AmBe source and Fig.…”