Nuclear Materials Identification System Operational Manual

Chiang, L.G.

doi:10.2172/814361

Cited by 10 publications

(7 citation statements)

References 30 publications

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“…When a fission spontaneously occurs, both neutrons and photons are released. The 252 Cf source is within a small fission chamber, which will trigger on fissile material being released, and therefore will set a start time for the event [8]. The 252 Cf source is plated on a platinum disk and is set parallel to the signal collector.…”

Section: Cf Spontaneous Fission Sourcementioning

confidence: 99%

Light Response of Poly(ethylene 2,6-napthalate) to Neutrons

Hackett¹,

deBoer²,

Efremenko³

et al. 2022

Preprint

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There is increasing necessity for low background active materials as ton-scale, rare-event and cryogenic detectors are developed. Poly(ethylene-2,6-naphthalate) (PEN) has been considered for these applications because of its robust structural characteristics, and its scintillation light in the blue wavelength region. Radioluminescent properties of PEN have been measured to aid in the evaluation of this material. In this article we present a measurement of PEN's quenching factor using three different neutron sources; neutrons emitted from spontaneous fission in 252 Cf , neutrons generated from a DD generator, and neutrons emitted from the 13 C(α,n) 16 O and the 7 Li(p,n) 7 Be nuclear reactions. The fission source used timeof-flight to determine the neutron energy, and the neutron energy from the nuclear reactions was defined using thin targets and reaction kinematics. The Birk's factor and scintillation efficiency were found to be kB = 0.12 ± 0.01 mm MeV −1 and S = 1.31 ± 0.09 MeV ee MeV −1 from a simultaneous analysis of the data obtained from the three different sources. With these parameters, it is possible to evaluate PEN as a viable material for large-scale, low background physics experiments.

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Section: Cf Spontaneous Fission Sourcementioning

confidence: 99%

Light Response of Poly(ethylene 2,6-napthalate) to Neutrons

Hackett¹,

deBoer²,

Efremenko³

et al. 2022

Preprint

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show abstract

“…In the time-tagged source, the 252 Cf is located on one plate of a parallel-plate ion chamber, allowing a timing signal to be generated by the ionization induced by energy loss from one or both of the fission fragments slowing in the ion chamber fill gas [6]. This induced signal was amplified and a logic signal generated by means of a constant-fraction discriminator.…”

Section: Performancementioning

confidence: 99%

Performance Of Fast-Neutron Imaging Detectors Based On Plastic Scintillator EJ-299-34

Blackston¹,

Hausladen²,

Liang³

et al. 2013

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“…NMIS is a time-dependent coincidence counting system that is used to characterize both fissile and nonfissile materials undergoing nondestructive assay (Chiang et al, 2001). NMIS characterizes materials by interrogating them with neutrons, either from an associated-particle DT neutron generator, which produces 14.1 MeV neutrons, or from a californium-252 spontaneous fission source, which produces a distribution of neutrons ranging from approximately 0.2 MeV to 7 MeV (Smith et al, 1957).…”

Section: Nmis Conceptsmentioning

confidence: 99%

Active Neutron Interrogation of Non-Radiological Materials with NMIS

Walker¹,

Mihalczo²

2012

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Nuclear Materials Identification System Operational Manual

Cited by 10 publications

References 30 publications

Light Response of Poly(ethylene 2,6-napthalate) to Neutrons

Light Response of Poly(ethylene 2,6-napthalate) to Neutrons

Performance Of Fast-Neutron Imaging Detectors Based On Plastic Scintillator EJ-299-34

Active Neutron Interrogation of Non-Radiological Materials with NMIS

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