Capture-gated neutron spectrometry

Czirr, J.B.; Merrill, David B.; Buehler, David B.; McKnight, Thomas K; Carroll, James L.; Abbott, T.R.; Wilcox, Eva

doi:10.1016/s0168-9002(01)01445-0

Cited by 52 publications

(26 citation statements)

References 4 publications

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“…A typical example is lithium gadolinium borate (LGB) doped with cerium [17,18]a which makes scintillating microcrystals that can be blended in PVT matrix (BC-490), for a possible neutron spectrometry [19]. This work demonstrated an increased resolution on standard samples (60 cm 3 ) for monoenergetic proton beam, but also claimed that higher volumes do not increase the resolution [18]b due to the weak light output and the diffusive nature of the dispersed LGB.…”

Section: Lithium Boron Cadmium and Gadolinium Loadings For Thermal mentioning

confidence: 99%

Pulse shape discrimination between (fast or thermal) neutrons and gamma rays with plastic scintillators: State of the art

Bertrand

Hamel

Normand

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

107

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Section: Lithium Boron Cadmium and Gadolinium Loadings For Thermal mentioning

confidence: 99%

Pulse shape discrimination between (fast or thermal) neutrons and gamma rays with plastic scintillators: State of the art

Bertrand

Hamel

Normand

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

107

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“…The detection method employed here is known as capture-gated spectroscopy [31,32,33,34]. In brief, the idea involves using an organic scintillator to detect fast neutrons through their recoil interaction with protons in the scintillator.…”

Section: Capture-gated Neutron Detectionmentioning

confidence: 99%

Fast neutron detection with a segmented spectrometer

Langford

Bass

Beise

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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A fast neutron spectrometer consisting of segmented plastic scintillator and 3 He proportional counters was constructed for the measurement of neutrons in the energy range 1 MeV to 200 MeV. We discuss its design, principles of operation, and the method of analysis. The detector is capable of observing very low neutron fluxes in the presence of ambient gamma background and does not require scintillator pulse-shape discrimination. The spectrometer was characterized for its energy response in fast neutron fields of 2.5 MeV, 14 MeV, and the results are compared with Monte Carlo simulations. Measurements of the fast neutron flux and energy response at 120 m above sea-level (39.130 • N, 77.218• W) and at a depth of 560 m in a limestone mine are presented. Finally, the design of a spectrometer with improved sensitivity and energy resolution is discussed.

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“…Capture-gated spectroscopy is a technique that uses delayed neutron captures to identify neutron interactions in an active medium [37,38,39,40,41,42]. Capture-gated detectors based on loaded liquid scintillator have been deployed in various environments [43,44].…”

Section: Introductionmentioning

confidence: 99%

Development and characterization of a high sensitivity segmented Fast Neutron Spectrometer (FaNS-2)

et al. 2016

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We present the development of a segmented fast neutron spectrometer (FaNS-2) based upon plastic scintillator and 3He proportional counters. It was designed to measure both the flux and spectrum of fast neutrons in the energy range of few MeV to 1 GeV. FaNS-2 utilizes capture-gated spectroscopy to identify neutron events and reject backgrounds. Neutrons deposit energy in the plastic scintillator before capturing on a 3He nucleus in the proportional counters. Segmentation improves neutron energy reconstruction while the large volume of scintillator increases sensitivity to low neutron fluxes. A main goal of its design is to study comparatively low neutron fluxes, such as cosmogenic neutrons at the Earth's surface, in an underground environment, or from low-activity neutron sources. In this paper, we present details of its design and construction as well as its characterization with a calibrated 252Cf source and monoenergetic neutron fields of 2.5 MeV and 14 MeV. Detected monoenergetic neutron spectra are unfolded using a Singular Value Decomposition method, demonstrating a 5% energy resolution at 14 MeV. Finally, we discuss plans for measuring the surface and underground cosmogenic neutron spectra with FaNS-2.

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Capture-gated neutron spectrometry

Cited by 52 publications

References 4 publications

Pulse shape discrimination between (fast or thermal) neutrons and gamma rays with plastic scintillators: State of the art

Pulse shape discrimination between (fast or thermal) neutrons and gamma rays with plastic scintillators: State of the art

Fast neutron detection with a segmented spectrometer

Development and characterization of a high sensitivity segmented Fast Neutron Spectrometer (FaNS-2)

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