Pulse shape discrimination

Roush, M.L.; Wilson, Mark A.; Hornyak, W.F.

doi:10.1016/0029-554x(64)90333-7

Cited by 173 publications

(48 citation statements)

References 7 publications

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“…Several methods exist to accomplish this, for example by measuring the zero-crossover (ZCO) time of a shaped pulse [16,17] or by comparing the charge collected from different parts of the pulse [18]. The performance of these methods with respect to each other is also well known in the analogue case [19].…”

Section: Liquid Scintillators and Pulse-shape Discriminationmentioning

confidence: 99%

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Digital pulse-shape discrimination of fast neutrons and rays

Söderström

Nyberg

Wolters

2008

Nuclear Instruments and Methods in Physics Research Section A:

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Discrimination of the detection of fast neutrons and γ rays in a liquid scintillator detector has been investigated using digital pulse-processing techniques. An experimental setup with a 252 Cf source, a BC-501 liquid scintillator detector, and a BaF 2 detector was used to collect waveforms with a 100 Ms/s, 14 bit sampling ADC. Three identical ADC's were combined to increase the sampling frequency to 300 Ms/s. Four different digital pulse-shape analysis algorithms were developed and compared to each other and to data obtained with an analogue neutron-γ discrimination unit. Two of the digital algorithms were based on the charge comparison method, while the analogue unit and the other two digital algorithms were based on the zero-crossover method. Two different figure-of-merit parameters, which quantify the neutron-γ discrimination properties, were evaluated for all four digital algorithms and for the analogue data set. All of the digital algorithms gave similar or better figure-of-merit values than what was obtained with the analogue setup. A detailed study of the discrimination properties as a function of sampling frequency and bit resolution of the ADC was performed. It was shown that a sampling ADC with a bit resolution of 12 bits and a sampling frequency of 100 Ms/s is adequate for achieving an optimal neutron-γ discrimination for pulses having a dynamic range for deposited neutron energies of 0.3-12 MeV. An investigation of the influence of the sampling frequency on the time resolution was made. A FWHM of 1.7 ns was obtained at 100 Ms/s.

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Section: Liquid Scintillators and Pulse-shape Discriminationmentioning

confidence: 99%

“…The shaping can be done by using double delay lines [16] or an RC-CR integrating and differentiating network [17]. The analogue PSD algorithm of the NDE202 unit used in this work contains a bipolar RC-CR shaping amplifier and a zero-crossing detector.…”

Section: Zco: Analogue and Convolution Algorithmmentioning

confidence: 99%

Digital pulse-shape discrimination of fast neutrons and rays

Söderström

Nyberg

Wolters

2008

Nuclear Instruments and Methods in Physics Research Section A:

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“…Sensitivity to gamma rays of organic scintillators is generally overcome by analyzing the temporal profiles of pulses using the popular technique of PSD. Because neutrons primarily interact with protons while gamma rays primarily interact with electrons, neutron interactions produce charged particles with higher specific ionization [12]. This creates a higher concentration of triplet states in the scintillator, which enables more frequent triplettriplet annihilations to occur after the initial light production and, consequently, produces a greater amount of delayed scintillation light.…”

Section: Pulse Shape Discrimination Performancementioning

confidence: 99%

Characterization of New-Generation Silicon Photomultipliers for Nuclear Security Applications

2018

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Abstract-Silicon photomultipliers have received a great deal of interest recently for use in applications spanning a wide variety of fields, including nuclear safeguards and nonproliferation. For nuclear-related applications, the ability of silicon photomultipliers to discriminate neutrons from gamma rays using pulse shape discrimination when coupled with certain organic scintillators is a characteristic of utmost importance. This work reports on progress characterizing the performance of twenty different silicon photomultipliers from five manufacturers with an emphasis on pulse shape discrimination performance and timing. Results are presented on pulse shape discrimination performance as a function of overvoltage for 6-mm x 6-mm silicon photomultipliers, and the time response to stilbene is characterized for silicon photomultipliers of three different sizes. Finally, comparison with a photomultiplier tube shows that some new-generation silicon photomultipliers can perform as well as photomultiplier tubes in neutron-gamma ray discrimination.

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“…The rise-time technique, [5], [6], integrates the light pulse (e.g., of the PMT anode), and then measures the time at which this integral reaches a certain fraction of its maximum amplitude. The light output of a heavily ionizing particle, which in n=c-ray discrimination is proton (neutron scatter interaction), has long tail; hence, the time at which this fraction is reached is longer than that of an electron (gamma ray interaction) [2].…”

Section: Classic Rise-time Techniquementioning

confidence: 99%

Quick algorithms for real-time discrimination of neutrons and gamma rays

Amiri

Přenosil

Cvachovec

et al. 2014

J Radioanal Nucl Chem

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Several new methods for the digital discrimination of neutrons and gamma-rays in a mixed radiation field are presented. The methods introduced discriminate neutrons and gamma rays successfully in the digital domain. They are mathematically simple and exploit samples during the life time of the pulse, hence appropriate for field measurements. All these methods are applied to a set of mixed neutron and photon signals from a stilbene scintillator and their discrimination qualities are compared.

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Pulse shape discrimination

Cited by 173 publications

References 7 publications

Digital pulse-shape discrimination of fast neutrons and rays

Digital pulse-shape discrimination of fast neutrons and rays

Characterization of New-Generation Silicon Photomultipliers for Nuclear Security Applications

Quick algorithms for real-time discrimination of neutrons and gamma rays

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