TY - GEN
T1 - Reference-pulses neutron/gamma-ray pulse shape discrimination in liquid scintillators for deposited neutron energies from 200 keV
AU - Ambers, Scott D.
AU - Huang, Lu
AU - Flaska, Marek
AU - Pozzi, Sara A.
PY - 2010
Y1 - 2010
N2 - A hybrid pulse shape discrimination (PSD) method is presented that combines a charge-integration PSD method with a reference-pulses PSD method. The reference-pulses PSD method uses detailed knowledge of the average, energy-dependent detector response to radiation. To obtain the reference pulses, a large number of neutron and gamma-ray pulses were averaged in several pulse height regions. The reference neutron and gamma-ray pulses were then used in the new PSD method for the classification of known measured pulses. The reference-pulses PSD method was applied below 70 keVee (keV electron equivalent), whereas the standard charge-integration PSD method was used above 70 keVee. This new hybrid PSD method proves to be more accurate than the standard charge-integration PSD method for classification of neutrons and gamma rays. Specifically, the improvement is approximately 30% for neutrons between 20 and 30 keVee (corresponding to approximately 50 and 225 keV neutron energy deposited). For this pulse height bin, approximately 72% of the neutrons were correctly classified by the hybrid PSD method. The average number of correctly classified neutrons is approximately 88% for the hybrid PSD method between 20 and 100 keVee (150 and 670 keV neutron energy deposited) as opposed to 83% for the charge-integration PSD method.
AB - A hybrid pulse shape discrimination (PSD) method is presented that combines a charge-integration PSD method with a reference-pulses PSD method. The reference-pulses PSD method uses detailed knowledge of the average, energy-dependent detector response to radiation. To obtain the reference pulses, a large number of neutron and gamma-ray pulses were averaged in several pulse height regions. The reference neutron and gamma-ray pulses were then used in the new PSD method for the classification of known measured pulses. The reference-pulses PSD method was applied below 70 keVee (keV electron equivalent), whereas the standard charge-integration PSD method was used above 70 keVee. This new hybrid PSD method proves to be more accurate than the standard charge-integration PSD method for classification of neutrons and gamma rays. Specifically, the improvement is approximately 30% for neutrons between 20 and 30 keVee (corresponding to approximately 50 and 225 keV neutron energy deposited). For this pulse height bin, approximately 72% of the neutrons were correctly classified by the hybrid PSD method. The average number of correctly classified neutrons is approximately 88% for the hybrid PSD method between 20 and 100 keVee (150 and 670 keV neutron energy deposited) as opposed to 83% for the charge-integration PSD method.
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U2 - 10.1109/NSSMIC.2010.5873912
DO - 10.1109/NSSMIC.2010.5873912
M3 - Conference contribution
AN - SCOPUS:79960295414
SN - 9781424491063
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 991
EP - 994
BT - IEEE Nuclear Science Symposuim and Medical Imaging Conference, NSS/MIC 2010
T2 - 2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 and 17th International Workshop on Room-Temperature Semiconductor X-ray and Gamma-ray Detectors, RTSD 2010
Y2 - 30 October 2010 through 6 November 2010
ER -