Neutron detection
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New Developments in Scintillators for Security Applications Open
Radiation is an important part of security space: It is detected either passively in search of special nuclear materials or actively to monitor or interrogate objects of interest. Systems relying on radiation require adequate detectors. Th…
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Status and Perspectives on the Cosmic‐Ray Neutron Method for Soil Moisture Estimation and Other Environmental Science Applications Open
Core Ideas Numerous studies have been conducted to develop and examine the accuracy of the method. Cosmic‐ray neutron soil moisture estimates compare well with independent measurements. These estimates are useful for modeling, data assimil…
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Coded-aperture imaging systems: Past, present and future development – A review Open
Scintillator based coded-aperture imaging has proven to be effective when applied for X- and gamma-ray detection. Adaptation of the same method for neutron imaging has resulted in a number of propitious systems, which could be potentially …
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Heliospheric modulation of cosmic rays during the neutron monitor era: Calibration using PAMELA data for 2006–2010 Open
A new reconstruction of the heliospheric modulation potential for galactic cosmic rays is presented for the neutron monitor era, since 1951. The new reconstruction is based on an updated methodology in comparison to previous reconstruction…
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Large-Scale Boron-Lined Neutron Detection Systems as a 3He Alternative for Cosmic Ray Neutron Sensing Open
Cosmic-Ray neutron sensors are widely used to determine soil moisture on the hectare scale. Precise measurements, especially in the case of mobile application, demand for neutron detectors with high counting rates and high signal-to-noise …
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SiC detectors: A review on the use of silicon carbide as radiation detection material Open
Silicon Carbide (SiC) is a wide bandgap semiconductor with many excellent properties that make it one of the most promising and well-studied materials for radiation particle detection. This review provides an overview of the main advantage…
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Intercomparison of cosmic-ray neutron sensors and water balance monitoring in an urban environment Open
Sensor-to-sensor variability is a source of error common to all geoscientific instruments that needs to be assessed before comparative and applied research can be performed with multiple sensors. Consistency among sensor systems is especia…
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Realization of highly efficient hexagonal boron nitride neutron detectors Open
We report the achievement of highly efficient 10B enriched hexagonal boron nitride (h-10BN) direct conversion neutron detectors. These detectors were realized from freestanding 4-in. diameter h-10BN wafers 43 μm in thickness obtained from …
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Critical Review of Scintillating Crystals for Neutron Detection Open
There exists an ongoing need to develop and improve methods of detecting radioactive materials. As each radioactive isotope leaves a unique mark in a form of the particles it emits, new materials capable of detecting and measuring these pa…
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A Novel Cosmic-Ray Neutron Sensor for Soil Moisture Estimation over Large Areas Open
A correct soil moisture estimation is a fundamental prerequisite for many applications: agriculture, meteorological forecast, flood and drought prediction, and, in general, water accounting and management. Traditional methods typically pro…
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Chasing quantitative biases in neutron imaging with scintillator-camera detectors: a practical method with black body grids Open
We propose a method for improving the quantification of neutron imaging measurements with scintillator-camera based detectors by correcting for systematic biases introduced by scattered neutrons and other sources such as light reflections …
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Modeling cosmic ray neutron field measurements Open
The cosmic ray neutron method was developed for intermediate‐scale soil moisture detection, but may potentially be used for other hydrological applications. The neutron signal of different hydrogen pools is poorly understood and separating…
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Intense, directed neutron beams from a laser-driven neutron source at PHELIX Open
Laser-driven neutrons are generated by the conversion of laser-accelerated ions via nuclear reactions inside a converter material. We present results from an experimental campaign at the PHELIX laser at GSI in Darmstadt where protons and d…
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Organic–inorganic hybrid perovskite scintillators for mixed field radiation detection Open
Sensitive and fast detection of neutrons and gamma rays is vital for homeland security, high‐energy physics, and proton therapy. Fast‐neutron detectors rely on light organic scintillators, and γ‐ray detectors use heavy inorganic scintillat…
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Prospect for application of compact accelerator-based neutron source to neutron engineering diffraction Open
A compact accelerator-based neutron source has been lately discussed on engineering applications such as transmission imaging and small angle scattering as well as reflectometry. However, nobody considers using it for neutron diffraction e…
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High efficiency hexagonal boron nitride neutron detectors with 1 cm2 detection areas Open
We report the realization of 1 cm2 hexagonal boron nitride (h-BN) thermal neutron detectors with an unprecedented detection efficiency of 59%. This was achieved through improvements in material quality, as reflected in a sixfold enhancemen…
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Fast Neutron Imaging with Semiconductor Nanocrystal Scintillators Open
Fast neutrons offer high penetration capabilities for both light and dense materials due to their comparatively low interaction cross sections, making them ideal for the imaging of large-scale objects such as large fossils or as-built plan…
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Hexagonal boron nitride neutron detectors with high detection efficiencies Open
Neutron detectors fabricated from 10B enriched hexagonal boron nitride (h-10BN or h-BN) epilayers have demonstrated the highest thermal neutron detection efficiency among solid-state neutron detectors to date at about 53%. In this work, ph…
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Neutron ghost imaging Open
Ghost imaging is demonstrated using a polyenergetic reactor source of thermal neutrons. This enables position resolution to be incorporated into a variety of neutron instruments that are not position resolving. Such a proof of concept enab…
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A novel segmented-scintillator antineutrino detector Open
The next generation of very-short-baseline reactor experiments will require compact detectors operating at surface level and close to a nuclear reactor. This paper presents a new detector concept based on a composite solid scintillator tec…
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Monitoring Environmental Water with Ground Albedo Neutrons from Cosmic Rays Open
Neutron monitors on the Earth's surface are usually used to track the dynamics of incoming cosmic-ray neutrons of high energy under the assumption that local environmental conditions do not influence the highly shielded flux.Oppositely, in…
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Neutron Imaging at LANSCE—From Cold to Ultrafast Open
In recent years, neutron radiography and tomography have been applied at different beam lines at Los Alamos Neutron Science Center (LANSCE), covering a very wide neutron energy range. The field of energy-resolved neutron imaging with epi-t…
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The Footprint Characteristics of Cosmic Ray Thermal Neutrons Open
The advance of the cosmic ray neutron (CRN) sensing method for estimating field scale soil moisture relied largely on simulations of the footprint properties of epithermal neutrons (∼0.5 eV–100 keV). Commercially available CRN probes are u…
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EXILL—a high-efficiency, high-resolution setup for γ-spectroscopy at an intense cold neutron beam facility Open
In the EXILL campaign a highly efficient array of high purity germanium (HPGe) detectors was operated at the cold neutron beam facility PF1B of the Institut Laue-Langevin (ILL) to carry out nuclear structure studies, via measurements of γ-…
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Neutron spectroscopy measurements of 14 MeV neutrons at unprecedented energy resolution and implications for deuterium–tritium fusion plasma diagnostics Open
An accurate calibration of the JET neutron diagnostics with a 14 MeV neutron generator was performed in the first half of 2017 in order to provide a reliable measurement of the fusion power during the next JET deuterium-tritium (DT) campai…
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14 MeV calibration of JET neutron detectors—phase 1: calibration and characterization of the neutron source Open
In view of the planned DT operations at JET, a calibration of the JET neutron monitors at 14 MeV neutron energy is needed using a 14 MeV neutron generator deployed inside the vacuum vessel by the JET remote handling system. The target accu…
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NEDA—NEutron Detector Array Open
The NEutron Detector Array, NEDA, will form the next generation neutron detection system that has been designed to be operated in conjunction with γ-ray arrays, such as the tracking-array AGATA, to aid nuclear spectroscopy studies. NEDA ha…
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Toward achieving flexible and high sensitivity hexagonal boron nitride neutron detectors Open
Hexagonal boron nitride (h-BN) detectors have demonstrated the highest thermal neutron detection efficiency to date among solid-state neutron detectors at about 51%. We report here the realization of h-BN neutron detectors possessing one o…
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CAMEA—A novel multiplexing analyzer for neutron spectroscopy Open
The analyzer detector system continuous angle multiple energy analysis will be installed on the cold-neutron triple-axis spectrometer RITA-2 at SINQ, PSI. CAMEA is optimized for efficiency in the horizontal scattering plane enabling rapid …
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Non-Destructive Study of Bulk Crystallinity and Elemental Composition of Natural Gold Single Crystal Samples by Energy-Resolved Neutron Imaging Open
Energy-resolved neutron imaging enables non-destructive analyses of bulk structure and elemental composition, which can be resolved with high spatial resolution at bright pulsed spallation neutron sources due to recent developments and imp…