Performance comparison of NE213 detectors for their application in moisture
measurement
By:Naqvi, AA (Naqvi, AA); Nagadi, MM (Nagadi, MM); Rehman, KU (Rehman, KU); Kidwai, S
(Kidwai, S)
APPLIED RADIATION AND ISOTOPES
Volume: 53
Issue: 4-5
Pages: 745-754
DOI: 10.1016/S0969-8043(00)00223-2
Published: OCT-NOV 2000
View Journal Information
Abstract
The pulse shape discrimination (PSD) characteristic and neutron detection efficiency of
NE213 detectors have been measured for their application in moisture measurements
using Cf-252 and Am-241-Be sources. In PSD studies neutron peak to valley (p(n)/V) ratio
and figure of merit M were measured at four different bias values for cylindrical 50, 125
and 250 mm diameter NE213 detectors. The result of this study has shown that better PSD
performance with the NE213 detector can be achieved with a smaller volume detector in
conjunction with a neutron source with smaller gamma-ray/neutron ratio. The neutron
detection efficiency of the 125 mm diameter NE213 detector for Am-241-Be and Cf-252
source spectra was determined at 0.85, 1.25 and 1.75 MeV bias energies using the
experimental neutron detection efficiency data of the same detector over 0.1-10 MeV
energy range. Due to different energy spectra of the 241Am-Be and 252Cf sources,
integrated efficiency of the 125 mm diameter NE213 detector for the two sources shows
bias dependence. At smaller bias, Cf-252 source has larger efficiency but as the bias is
increased, the detector has larger efficiency for 241Am-Be source. This study has revealed
that NE213 detector has better performance (such as PSD and neutron detection efficiency)
in simultaneous detection of neutron and gamma-rays in moisture measurements, if it is
used in conjunction with 241Am-Be source at higher detector bias. (C) 2000 Elsevier
Science Ltd. All rights reserved.
Keywords
KeyWords Plus:RESPONSE FUNCTION MEASUREMENTS; PULSE-SHAPE DISCRIMINATION;
NE102A
Author Information
Reprint Address: Naqvi, AA (reprint author)
King Fahd Univ Petr & Minerals, Ctr Appl Phys Sci, Dhahran 31261, Saudi Arabia.
Organization-Enhanced Name(s)
King Fahd University of Petroleum & Minerals
Addresses:
[ 1 ] King Fahd Univ Petr & Minerals, Ctr Appl Phys Sci, Dhahran 31261, Saudi Arabia
Organization-Enhanced Name(s)
King Fahd University of Petroleum & Minerals
Document Information
Document Type:Article; Proceedings Paper
Language:English
Accession Number: WOS:000088830600034
ISSN: 0969-8043