Multi-layer plastic scintillation detector for intermediate- and high-energy neutrons withn-γdiscrimination capability

Abstract

A new type of neutron detector, named Stack Structure Solid organic Scintillator (S 4 ), consisting of multi-layer plastic scintillators with capability to suppress low-energy γ rays under high-counting rate has been constructed and tested. To achieve n-γ discrimination, we exploit the difference in the ranges of the secondary charged particles produced by the interactions of neutrons and γ rays in the scintillator material. The thickness of a plastic scintillator layer was determined based on the results of Monte Carlo simulations using the Geant4 toolkit. With layer thicknesses of 5 mm, we have achieved a good separation between neutrons and γ rays at 5 MeV ee threshold setting.We have also determined the detection efficiencies using monoenergetic neutrons at two energies produced by the d +d → n+ 3 He reaction. The results agree well with the Geant4 simulations implementing the Liège Intranuclear Cascade hadronic model (INCL++) and the high-precision

Development of plastic scintillators loaded with perovskite quantum dots and wavelength shifting molecules

“…Because the fabrication process was similar for all samples, the difference in the microstructure may be attributed to the difference in the surface modification of the QDs, which results in a difference in the aggregation behavior. Because typical range of photoelectrons of ∼60 keV is ∼100 μm, 38) the samples are considered to be quasi-homogeneous from the viewpoint of the photoelectron range.…”

Novel multi-layer plastic-scintillator-based solid active proton target for inverse-kinematics experiments

“…While the exact mechanisms for both phenomena have remained unclear, it seems that the tensor interactions may play an important role [5,6]. The observations of possible effect of the tensor interactions in 16 O via (p,d) [7] and (p,dp) [8] reactions on 16 O at high-momentum transfer have opened up new possibilities to understand the effect of tensor interactions on the structure of atomic nuclei.…”

“…Here, we report on the development of a novel multi-layer solid-state active proton target, named Stack Structure Solid organic Scintillator Active Target (S 4 AT). The device consists of ordinary commercial plastic scintillators, and is therefore highly affordable and flexible; such advantages have already been demonstrated by the recently developed S 4 neutron detector [16]. S 4 AT offers a versatile alternative proton (or deuteron) target for spectroscopic studies with radioactive isotope (RI) beams using nuclear reactions, especially reactions that result in more than one charged particle being ejected, in inverse kinematics.…”