Prescila: A New, Lightweight Neutron Rem Meter

Olsher, R. H.; Seagraves, D.T.; Eisele, Shawna L.; Bjork, C. W.; Martínez, William; Romero, Leonard L.; Mallett, M.W.; Duran, Michael A.; Hurlbut, C.

doi:10.1097/00004032-200406000-00005

Cited by 38 publications

(13 citation statements)

References 9 publications

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“…The response function of PRESCILA, however, is quite nonuniform with respect to neutron energy. For instance, the response to epithermal neutrons with energies between 1 eV and 10 keV is more than an order of magnitude greater than the response to neutrons with energies between 100 keV and 1 MeV (Olsher et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Development and Test of a Gem-Based Tepc for Neutron Protection Dosimetry

Wang

Seidaliev²,

Mandapaka³

2008

Health Physics

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A novel tissue-equivalent proportional counter (TEPC) based on a gas electron multiplier (GEM) for measuring H*(10) for neutrons was designed and constructed. The pulse height spectra (PHS) of two different neutron sources (a 252Cf source and a AmBe source) were measured using the new TEPC. The measurements were made with the TEPC filled with two different gases (10P gas and a propane-based tissue-equivalent gas) at various pressures. A computer simulation of the new TEPC, based on the Monte Carlo method, was performed to obtain the PHS for the two neutron sources. It is shown that the experimental results agree well with the simulation results for both 252Cf and AmBe neutron sources. Several outstanding problems are discussed and suggestions are made to make the GEM-based TEPC a practical neutron rem meter. The potential advantage of this novel neutron rem meter would be its low weight and compactness.

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Section: Introductionmentioning

confidence: 99%

Development and Test of a Gem-Based Tepc for Neutron Protection Dosimetry

Wang

Seidaliev²,

Mandapaka³

2008

Health Physics

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“…The plastic detector could be used alone for efficient measurement of fast-neutron fields, like the hand-held survey meter developed by Yoshida et al [47]. Alternatively it could be used in conjunction with a conventional detector, augmenting the detection efficiency for fast-neutrons and reducing the mass of moderator necessary for the desired energy response [48]. The separated fast neutron and gamma spectra may be of additional use in characterizing an unknown radiation field.…”

Section: Discussionmentioning

confidence: 99%

Neutron-Gamma Pulse Shape Discrimination Using Organic Scintillators With Silicon Photomultiplier Readout

Preston

Eberhardt

Tickner

2014

IEEE Trans. Nucl. Sci.

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Neutron/Gamma pulse shape discrimination (PSD) was measured using stilbene and EJ-299-34 plastic scintillators with readout by silicon photomultipliers (SiPMs). The SiPM pulses were digitized and processed for energy and pulse shape information using a digital technique performing numerical weighted integrations on each pulse. A genetic algorithm (GA) was developed to optimize the weighting vectors used for the pulse shape discrimination. Efficient PSD was obtained down to an electron-equivalent energy of 127 keV with stilbene and 391 keV with the EJ-299-34 PSD plastic. Separation at lower energies was possible at reduced detection efficiency, down to 78 keV and 186 keV at 50% efficiency. The detectors were used to measure separated gamma and neutron spectra from an Americium-Beryllium neutron source and from a Na-22 gamma source. The GA-optimized weighted integration was compared with digital charge comparison (DCC). The GA exhibited slightly improved performance with a 400 MSps digitization rate and showed a significant advantage at sample rates below 100 MSps.

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“…4.13, the sensitivity of the GEM-based TEPC for a bare 252 Cf neutron source was calculated to be 1.1 cpm per µSv h -1 , which is smaller than the sensitivity of the PRESCILA neutron probe [35]. However, as mentioned earlier, one can increase the sensitivity many times by stacking several GEM-based TEPCs together in one unit and by increasing the surface area of the detector.…”

Section: Response As a Neutron Rem Metermentioning

confidence: 91%

Development and Test of a GEM-Based TEPC System for In-Phantom Dose Measurements

Wang¹

2007

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Prescila: A New, Lightweight Neutron Rem Meter

Cited by 38 publications

References 9 publications

Development and Test of a Gem-Based Tepc for Neutron Protection Dosimetry

Development and Test of a Gem-Based Tepc for Neutron Protection Dosimetry

Neutron-Gamma Pulse Shape Discrimination Using Organic Scintillators With Silicon Photomultiplier Readout

Development and Test of a GEM-Based TEPC System for In-Phantom Dose Measurements

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