A neutron coincidence spectrometer

Czirr, J.B.; Jensen, Gary L.

doi:10.1016/0168-9002(89)90303-3

Cited by 28 publications

(13 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fitting the simple exponential function e t/τ , yields τ = 30.1 µs, 16.0 µs, and 11.9 µs for the 3rd (green), 2nd (red), and 1st (black) intervals respectively. Taking the ratio of each τ to that for the 3rd interval yields 0.39 : 0.55 : 1, close to the expected1…”

supporting

confidence: 69%

“…Recently, there has been considerable activity in producing and evaluating neutron capture correlation detectors. Examples of capture-gated neutron spectrometers [1] include those for deep underground neutron background measurements [2], nuclear physics measurements [3], and fissile material detection [4,5,6]. Efforts to exploit correlations between neutron captures for neutron background measurements [7] and fissile material detection [8] are also underway.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A note on neutron capture correlation signals, backgrounds, and efficiencies

Bowden

Sweany

Dazeley

2012

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

A wide variety of detection applications exploit the timing correlations that result from the slowing and eventual capture of neutrons. These include capture-gated neutron spectrometry, multiple neutron counting for fissile material detection and identification, and antineutrino detection. There are several distinct processes that result in correlated signals in these applications. Depending on the application, one class of correlated events can be a background that is difficult to distinguish from the class that is of interest. Furthermore, the correlation timing distribution depends on the neutron capture agent and detector geometry. Here, we explain the important characteristics of the neutron capture timing distribution, making reference to simulations and data from a number of detectors currently in use or under development. We point out several features that may assist in background discrimination, and that must be carefully accounted for if accurate detection efficiencies are to be quoted.

show abstract

supporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

A note on neutron capture correlation signals, backgrounds, and efficiencies

Bowden

Sweany

Dazeley

2012

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

show abstract

“…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:

View full text Add to dashboard Cite

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.

show abstract

“…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

View full text Add to dashboard Cite

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.

show abstract

A neutron coincidence spectrometer

Cited by 28 publications

References 1 publication

A note on neutron capture correlation signals, backgrounds, and efficiencies

A note on neutron capture correlation signals, backgrounds, and efficiencies

Fast neutron detection with a segmented spectrometer

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

Contact Info

Product

Resources

About