A novel approach to neutron dosimetry

Balmer, Matthew; Gamage, Kelum A. A.; Taylor, G C

doi:10.1118/1.4964456

Cited by 3 publications

(3 citation statements)

References 24 publications

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“…Nonetheless, successfully implemented PSD is consistent with the claim of the preceding work where the same digitiser was tested with simulated neutron and gamma-ray pulses [39]. The digitiser was also utilised in a novel neutron survey meter, which further advocates the statement that good PSD results can be obtained with 150 MSps system [30].…”

Section: Jinst 12 P07023supporting

confidence: 77%

“…Nonetheless, another study, conducted two years after the study by Flaska, successfully carried out crystal scintillator characterisation using 14-bit resolution, 200 MSps digitiser [13]. A digitiser of equal resolution and even lower sampling frequency (150 MSps) was effectively utilised to perform PSD for a neutron survey meter [30].…”

Section: Digitiser Selectionmentioning

confidence: 99%

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Pulse shape discrimination characteristics of stilbene crystal, pure and ⁶Li loaded plastic scintillators for a high resolution coded-aperture neutron imager

2017

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Pulse shape discrimination characteristics of stilbene crystal, pure and 6 Li loaded plastic scintillators for a high resolution coded-aperture neutron imagerTo cite this article: M.J. Cielak et al 2017 JINST 12 P07023 View the article online for updates and enhancements. Related contentInvestigation into a suitable scintillator and coded-aperture material for a mixed-field radiation imaging system M.J. Cielak, K.A.A. Gamage and R. Glover A: Pulse shape discrimination performances of single stilbene crystal, pure plastic and 6 Li loaded plastic scintillators have been compared. Three pulse shape discrimination algorithms have been tested for each scintillator sample, assessing their quality of neutron/gamma separation. Additionally, the digital implementation feasibility of each algorithm in a real-time embedded system was evaluated. Considering the pixelated architecture of the coded-aperture imaging system, a reliable method of simultaneous multi-channel neutron/gamma discrimination was sought, accounting for the short data analysis window available for each individual channel. In this study, each scintillator sample was irradiated with a 252 Cf neutron source and a bespoke digitiser system was used to collect the data allowing detailed offline examination of the sampled pulses. The figure-of-merit was utilised to compare the discrimination quality of the collected events with respect to various discrimination algorithms. Single stilbene crystal presents superior neutron/gamma separation performance when compared to the plastic scintillator samples.

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Section: Jinst 12 P07023supporting

confidence: 77%

Section: Digitiser Selectionmentioning

confidence: 99%

Pulse shape discrimination characteristics of stilbene crystal, pure and ⁶Li loaded plastic scintillators for a high resolution coded-aperture neutron imager

2017

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“…Chen et al [3] and Levin and Narendra [4] demonstrated that nonlinear systems can be identified using neural networks. Furthermore, free open-source libraries such as the Fast Artificial Neural Network Library (FANN) [5] for network learning have already enabled researchers in various fields to use neural networks [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. In fact, neural networks have recently been used for the identification of a wide range of nonlinear systems, including biological systems [23][24][25][26][27][28][29][30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Derivation of NARX models by expanding activation functions in neural networks

Inaoka

Kobayashi

Nebuya

et al. 2019

IEEJ Transactions Elec Engng

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A method was developed to derive an NARX model from a neural network so that the usability of open‐source libraries for network learning was combined with the NARX advantage of revealing the system structure. After the neural network model was trained on input and output data, the sigmoid activation functions were expanded into Taylor series. Candidate parameters in the NARX model were calculated from the connection weights in the neural network and coefficients in the series. The NARX model structure was determined by the extended least‐squares (ELS) method and the Bayesian information criterion (BIC). Correct NARX models were successfully detected in computer simulations and an experiment. The developed method can be used for any activation functions, including the sigmoid function, if they are expanded into Taylor series. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Dual-Particle Dosemeter Based on Organic Scintillator

Miller

Fulvio

Clarke

et al. 2020

Radiation Protection Dosimetry

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Traditionally available handheld dosemeters are generally sensitive to only one type of radiation: neutrons or photons. Some dosemeters also rely on very specific attenuation correlations between response and dose, are not scalable in size and multiple dosemeters are required to characterise mixed-particle fields. The research presented here serves as a proof-of-concept for a method to simultaneously measure dose rates from neutrons and photons using a particle discriminating organic scintillation detector without the need for spectral deconvolution. The method was compared with traditional instruments and to simulation. Isotopic photon dose rates measured with this method were within 4% of simulated truth, whereas fission spectrum neutron dose rates were measured within 21%. Measurements of dose rates from both particles agree with simulated truth better than traditional instruments. This new method allows for measurement of dose equivalent from both neutrons and photons with a single instrument and no reliance on spectral deconvolution.

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A novel approach to neutron dosimetry

Abstract: This work presents a novel, real-time, approach to workplace neutron dosimetry. It is believed that in the research presented in this paper, for the first time, a single instrument has been able to estimate effective dose.

Cited by 3 publications

References 24 publications

Pulse shape discrimination characteristics of stilbene crystal, pure and ⁶Li loaded plastic scintillators for a high resolution coded-aperture neutron imager

Pulse shape discrimination characteristics of stilbene crystal, pure and ⁶Li loaded plastic scintillators for a high resolution coded-aperture neutron imager

Derivation of NARX models by expanding activation functions in neural networks

Dual-Particle Dosemeter Based on Organic Scintillator

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A novel approach to neutron dosimetry

Abstract: This work presents a novel, real-time, approach to workplace neutron dosimetry. It is believed that in the research presented in this paper, for the first time, a single instrument has been able to estimate effective dose.

Cited by 3 publications

References 24 publications

Pulse shape discrimination characteristics of stilbene crystal, pure and 6Li loaded plastic scintillators for a high resolution coded-aperture neutron imager

Pulse shape discrimination characteristics of stilbene crystal, pure and 6Li loaded plastic scintillators for a high resolution coded-aperture neutron imager

Derivation of NARX models by expanding activation functions in neural networks

Dual-Particle Dosemeter Based on Organic Scintillator

Contact Info

Product

Resources

About

Pulse shape discrimination characteristics of stilbene crystal, pure and ⁶Li loaded plastic scintillators for a high resolution coded-aperture neutron imager

Pulse shape discrimination characteristics of stilbene crystal, pure and ⁶Li loaded plastic scintillators for a high resolution coded-aperture neutron imager