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Showing 1 to 20 of 30 for “"pulse shape discrimination"”.
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Design & Analysis of Mixed-mode Integrated Circuit for Pulse-shape Discrimination
… is to measure characteristics intrinsic to the pulse shape of each radiation type in order to perform pulse-shape discrimination (PSD).</p> <p>Historically, PSD capable systems have been designed with two approaches in mind: specialized analog circuitry, or digital signal processing (DSP). In …
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System-on-chip-based radiation imaging system with pulse shape discrimination capability
… its feasibility in performing spectroscopy, pulse shape discrimination (PSD), and image reconstruction, hence overcoming the constraint for deployment of hand-held scintillator-based stand-off imagers. A new PSD method, referred to as digital shaping (DS) PSD, was developed and optimized …
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The Development of the SNO+ Experiment: Scintillator Timing, Pulse Shape Discrimination, and Sterile Neutrinos
… specifically using a Gatti filter, improved the discrimination capability back to the levels determined in the bench-top setup. One of the physics goals of SNO+ is the first precision measurement of the pep solar neutrino flux at the level of about 5% uncertainty. A study was performed to …
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A novel detection system using neutron/gamma pulse shape discrimination, for use in active interrogation environments
… fit to better represent the rising edge of pulses from both neutrons and gamma rays than the currently used Marrone fit (suited to the decay tail of pulses). • The ability to clearly distinguish a selection of gamma rays using this rise time technique post-processing previously acquired data …
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Polymerizable dopants capable of high light output and pulse shape discrimination for application in plastic scintillators
… PSs has become even more widespread due to their pulse shape discrimination (PSD) capabilities – the ability to detect and discriminate neutron (n) signals in gamma () radiation background. This is achieved by simply over doping 2,5-diphenyloxazole (PPO) in poly(vinyltoluene) matrices. However, …
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An Analysis of the 3-He Proportional Counter Data from the Sudbury Neutrino Observatory Using Pulse Shape Discrimination
This thesis presents an independent analysis of the data from 3-He-filled proportional counters from the third phase of the Sudbury Neutrino Observatory (SNO) data. These counters were deployed in SNO's heavy water to independently detect neutrons produced by the neutral current interaction of 8-B …
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The measurements of neutron and gamma dose rates in mixed radiation fields, using a liquid scintillation counter
… a liquid scintillation counter NE213 with a pulse shape discrimination technique based on the charge comparison method. A computer program was used to analyse the experimental data. The radiation field was obtained from a 241Am-9Be source. There was general agreement between measured and …
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The neutron-deutron breakup cross section between 8 and 22 MeV
… were separated from the recoil deuterons by pulse shape discrimination. A comparison of these measurements with recent calculations favours those performed with local potentials.
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Neutron induced alpha production from carbon between 18 and 22 MeV
… anthracene crystal as both target and detector. Pulse shape discrimination was employed to separate the alphas and elastically scattered deuterons from the other reaction products. Published (n,d) elastic scattering data were used as a standard to obtain the alpha production cross sections. …
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A new compact neutron spectrometer
… and a digital implementation of pulse shape discrimination is used to separate events associated with neutrons from those associated with gamma-rays. The spectrometer is suitable over the neutron energy range 1 – 100 MeV, and the development illustrated with measurements made …
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Alpha emission from the interactions of 14-200 MeV neutrons on carbon-12
… energy was determined by time-of-flight and pulse shape discrimination (PSD) was used to identify and separate alphas and deuterons from other reaction products. The feasibility of distinguishing different mechanisms for the ¹²C(n,n')3α reaction by means of PSD was also investigated.
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Alpha decay of excited states of carbon-12
… other events by a specialised application of the pulse shape discrimination technique. A numerical analysis of the data has yielded alpha-particle energy spectra over a wide energy range. A counter has been assembled to detect neutrons scattered by carbon nuclei in the crystal, and the …
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Differential cross section for neutron-proton radiative capture at En=63.4 MeV
… simultaneously and the deuteron identified using pulse shape discrimination. Data taken at eight n-ϒ angles (45°-150°) were transformed to deuteron photodisintegration cross sections at the equivalent laboratory energy, Eᵧ = 33.9 MeV. The data were analysed in combination with independent …
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Polarization in neutron-deuteron scattering from 8 to 22 MeV
… scattering within the crystal were studied and pulse shape discrimination (PSD) was used to determine the left-right asymmetry of the recoils. The experimental method depends on the fact that the PSD response of the crystal is sensitive to the direction of the recoil deuteron relative to the …
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Measurement of fluence at the D-line fast neutron facility at iThemba LABS
… irradiating a 6 mm natural lithium target with pulsed proton beams obtained from the k = 200 separated sector cyclotron. Three incident proton beam energies were used in this work, namely 65.99 MeV, 99.44 MeV and 203.33 MeV. From time-of-flight measurements with the NE213 scintillator, the …
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A compact neutron spectrometer for detecting neutrons produced by cosmic rays
… The compact detector displays good quality pulse shape discrimination for the separation of neutron and gamma ray events. Neutron energy spectra were obtained through time-of-flight (ToF) measurements and spectrum unfolding. The energy spectra obtained from ToF display energy resolution …
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Measurements of the Absolute Cross Section of the Three-body Photodisintegration of Helium-3 Between E[gamma] = 11.4 MeV and 14.7 MeV at HIGS
… scintillator detectors. Time-of-flight (TOF) and pulse-shape discrimination (PSD) techniques were used to identify neutron events. The absolute differential cross sections for the <super>3</super>He(&gamma, n)pp reaction as a function of outgoing neutron scattering angle and energy were determined …
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A compact high-energy particle detector for low-cost deep space missions
… as the detector. Using modern digital pulse shape discrimination and signal processing techniques, the scintillator and photomultiplier combination has been shown to accurately discriminate between the di_erent particle types and provide information such as total energy and incident …
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Internal Radioactive Source Calibration of the Borexino Solar Neutrino Experiment
… to give us a thorough understanding of both the pulse shape discrimination efficiency and the energy and time response of Borexino. Energy calibration for alphas, betas, and gammas (energy scales) can be accomplished with such sources. When the calibration source is used in conjunction with an …
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Neutron Emission Following Nuclear Muon Capture in Al
… using an integrated charge comparison method for pulse shape discrimination. The response of the detectors is studied using NRESP7 and Geant4. The neutron emission spectra are unfolded in the energy range from 2 to 12 MeV using Heprow. The resulting spectrum from Al is compared to current …
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