Testing of Scintillation Detectors in Quasi-Monoenergetic Neutron Spectra in a Silicon Filtered Neutron Beam at the LVR-15 Research Reactor

2019 ◽  
Vol 5 (3) ◽  
Author(s):  
Michal Košťál ◽  
Zdeněk Matěj ◽  
Filip Mravec ◽  
František Cvachovec ◽  
Martin Schulc ◽  
...  
Keyword(s):  
Cross Section ◽  
Homeland Security ◽  
Pulse Shape ◽  
Spontaneous Fission ◽  
Research Reactor ◽  
Neutron Field ◽  
Pulse Shape Discrimination ◽  
Shape Discrimination ◽  
Neutron Spectra ◽  
Fission Spectrum

With increasing needs of neutron detection in energy and homeland security sectors, there is an aim in the development of new suitable detection materials with possible n/g separation and also satisfactory resolution. This issue is connected with a well-defined neutron field. The neutron standards 252Cf(spontaneous fission) and 235U(nth fission) have smooth spectra; thus, the tests in these fields can be used for testing of neutron gamma pulse shape discrimination (PSD), but cannot reveal possible problems in the deconvolution. New neutron field which is formed from fission spectrum filtered by 1 m thick silicon block was developed in Research Center Rez. Due to the course of the silicon cross section, the well-distinguished neutron peaks occur in filtered neutron spectrum. In this field, various scintillation materials, HIDEX Aqualight, and EJ299-33A were tested.

scholarly journals Pulse-shape discrimination scintillators for homeland security applications

2016 ◽  
Vol 44 ◽  
pp. 1660214 ◽  
Author(s):  
Mark E. Ellis ◽  
Kirk Duroe ◽  
Paul A. Kendall
Keyword(s):  
Homeland Security ◽  
Pulse Shape ◽  
Sampling Rate ◽  
Discrimination Performance ◽  
Pulse Shape Discrimination ◽  
Shape Discrimination ◽  
Detector Arrays ◽  
Security Applications ◽  
Early Results ◽  
Analogue To Digital

An extensive programme of research has been conducted for scintillation liquids and plastics capable of neutron–gamma discrimination for deployment in future passive and active Homeland Security systems to provide protection against radiological and nuclear threats. The more established detection materials such as EJ-301 and EJ-309 are compared with novel materials such as EJ-299-33 and p-terphenyl. This research also explores the benefits that can be gained from improvements in the analogue–to–digital sampling rate and sample bit resolution. Results are presented on the Pulse Shape Discrimination performance of various detector and data acquisition combinations and how optimum configurations from these studies have been developed into field-ready detector arrays. Early results from application-specific experimental configurations of multi-element detector arrays are presented.

scholarly journals Comparison of neutron/gamma separation qualities of various organic scintillation materials

2020 ◽  
Vol 225 ◽  
pp. 04017
Author(s):  
Zdeněk Matěj ◽  
Filip Mravec ◽  
Aleš Jančář ◽  
Michal Košťál ◽  
František Kučera ◽  
...  
Keyword(s):  
Pulse Shape ◽  
Integration Method ◽  
Sampling Frequency ◽  
Neutron Field ◽  
Measured Data ◽  
Pulse Shape Discrimination ◽  
Shape Discrimination ◽  
Gamma Spectrometer ◽  
Linearity Improvement ◽  
Spectrometric System

In this work we compare the pulse-shape discrimination (PSD) properties of EJ-299-33A, BC-501A, stilbene, p-terphenyl and Hidex Aqualight in neutron field generated by the LVR-15 reactor with silicon filter utilization. Pulses from the scintillators are processed by Neutron-Gamma spectrometer. This spectrometric system with fast digitizer card contains two analog-digital (A/D) converters with a resolution of 12 bits and sampling frequency 500 MHz. For photomultiplier (PMT) linearity improvement active divider has been used. Measured data from scintillators have been processed using the integration method and compared. Results are presented.

scholarly journals Comparison of neutron/gamma separation qualities of various organic scintillation materials

2020 ◽  
Vol 225 ◽  
pp. 04028
Author(s):  
Zdeněk Matěj ◽  
Filip Mravec ◽  
Aleš Jančář ◽  
Michal Košťál ◽  
František Kučera ◽  
...  
Keyword(s):  
Pulse Shape ◽  
Integration Method ◽  
Sampling Frequency ◽  
Neutron Field ◽  
Measured Data ◽  
Pulse Shape Discrimination ◽  
Shape Discrimination ◽  
Gamma Spectrometer ◽  
Linearity Improvement ◽  
Spectrometric System

In this work we compare the pulse-shape discrimination (PSD) properties of EJ-299-33A, BC-501A, stilbene, p-terphenyl and Hidex Aqualight in neutron field generated by the LVR-15 reactor with silicon filter utilization. Pulses from the scintillators are processed by Neutron-Gamma spectrometer. This spectrometric system with fast digitizer card contains two analog-digital (A/D) converters with a resolution of 12 bits and sampling frequency 500 MHz. For photomultiplier (PMT) linearity improvement active divider has been used. Measured data from scintillators have been processed using the integration method and compared. Results are presented.

Solar Flare Energetic Neutral Emission Measurements in the Project Coronas-I

1994 ◽  
Vol 144 ◽  
pp. 635-639
Author(s):  
J. Baláž ◽  
A. V. Dmitriev ◽  
M. A. Kovalevskaya ◽  
K. Kudela ◽  
S. N. Kuznetsov ◽  
...  
Keyword(s):  
Solar Flare ◽  
Energy Range ◽  
Gamma Rays ◽  
Pulse Shape ◽  
Gamma Ray ◽  
Pulse Shape Discrimination ◽  
Shape Discrimination ◽  
Solar Neutron ◽  
Low Altitude

AbstractThe experiment SONG (SOlar Neutron and Gamma rays) for the low altitude satellite CORONAS-I is described. The instrument is capable to provide gamma-ray line and continuum detection in the energy range 0.1 – 100 MeV as well as detection of neutrons with energies above 30 MeV. As a by-product, the electrons in the range 11 – 108 MeV will be measured too. The pulse shape discrimination technique (PSD) is used.

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