In this paper, an epithermal neutron detector suitable for the Prompt Fission Neutron (PFN) uranium logging method is designed by Monte Carlo simulation. According to the simulation results, the epithermal neutron detector composed of a 1 mm cadmium (Cd) layer, a 5 mm high-density polyethylene (HDPE) layer, and a He tube is sensitive to epithermal neutrons. Through the simulation test of Monte Carlo in formations with different uranium content, the results show that the uranium content in the formation has an obvious linear relationship with E/T, and the detection limit can meet the minimum standard for uranium ore detection. It meets the design expectation and provides a basis for the optimal design of an epithermal neutron detector.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.apradiso.2024.111369 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
An accelerator-based neutron source design with a thermal neutron port and an epithermal neutron port for boron neutron capture therapy.
Appl Radiat Isot
December 2024
Institute of Nuclear Techniques of Budapest University of Technology and Economics, Műegyetem Rkp 9, 1111, Budapest, Hungary.
This study presents a compact accelerator-driven neutron source design with a thermal neutron port and an epithermal neutron port for Boron Neutron Capture Therapy (BNCT), based on 10 mA 2.5 MeV protons bombarding on a 100 μm thick disc-shaped Li target with a diameter of 10 cm. The moderator consists of 2 parts, the epithermal neutron moderator and the thermal neutron moderator.
View Article and Find Full Text PDFLumaCam: a novel class of position-sensitive event mode particle detectors using scintillator screens.
Sci Rep
December 2024
Forschungs-Neutronenquelle Heinz Maier-Leibnitz, 85748, Garching, Germany.
A new type of position-sensitive detectors is gaining attention in the neutron community. They are scintillator based detectors that detect the scintillation light on an individual photon basis via an image intensifier and a fast image sensor. Their readout operates in event mode i.
View Article and Find Full Text PDFEpithermal neutron activation dosimetry-(n, γ) reactions under boron-based filters.
Sci Rep
November 2024
Jožef Stefan Institute, Jamova Cesta 39, 1000, Ljubljana, Slovenia.
Neutron activation dosimetry is the primary method for the determination of the neutron flux or fluence, and in general, it is sensitive to the thermal and resonance energy ranges (radiative capture reactions- reactions) and the fast energy range (threshold reactions). However, there are very few nuclear reactions which are sensitive specifically to neutrons in the intermediate-epithermal-energy region. This energy region, along with the fast energy range, will become particularly important in the development and deployment of new reactor technologies (Generation IV reactors and Small Modular Reactors-SMRs), which are currently being championed as technologies enabling a meaningful contribution to decarbonization and the fight against climate change, as well as nuclear fusion.
View Article and Find Full Text PDFDevelopment of a multi-layer high-efficiency GEM-based neutron detector for spallation sources.
Sci Rep
October 2024
Università degli Studi Milano-Bicocca, Piazza dell'Ateneo Nuovo 1, 20126, Milan, Italy.
Neutron detection is nowadays mostly based on He gas detectors, but its shortage and the continuous upgrades of the neutron facilities require new devices to perform experiments with maximum performances. This work presents a new detector based on the Gas Electron Multiplier (GEM) combined with several boron layers. This detector combines the features of GEM technology with the properties of boron as a neutron converter and the device is produced to sustain high neutron fluxes with high detection efficiency.
View Article and Find Full Text PDFEffect of neutron beam properties on dose distributions in a water phantom for boron neutron capture therapy.
J Radiat Res
December 2024
Hokkaido University, Kita-13 Nishi-8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan.
From the viewpoints of the advantage depths (ADs), peak tumor dose and skin dose, we evaluated the effect on the dose distribution of neutron beam properties, namely the ratio between thermal and epithermal neutron fluxes (thermal/epithermal ratio), fast neutron component and γ-ray component. Several parameter surveys were conducted with respect to the beam properties of neutron sources for boron neutron capture therapy assuming boronophenylalanine as the boron agent using our dose calculation tool, called SiDE. The ADs decreased by 3% at a thermal/epithermal ratio of 20-30% compared with the current recommendation of 5%.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!