Phenomenological Model for Predicting theEnergy Resolution of Neutron-Damaged Coaxial HPGe Detectors

Siclen, Clinton DeW. Van; Seabury, E. H.; Wharton, C. J.; Caffrey, A.J.

doi:10.1109/tns.2012.2209896

Cited by 5 publications

(1 citation statement)

References 7 publications

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“…The first was a series of irradiations on an ORTEC MicroDetective, where the effects of neutron damage were compared with those on a standard n-type LN2-cooled PINS detector. The results [5] of this experiment have been used to develop a phenomenological model of neutron damage and have been previously reported. We will concentrate here on the results of a second series of irradiations on the ORTEC TransSpec mechanically-cooled spectrometer.…”

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Neutron damage in mechanically-cooled high-purity germanium detectors for field-portable Prompt Gamma Neutron Activation analysis (PGNAA) systems

Seabury

Siclen²,

Mccabe

et al. 2013

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC)

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Abstract-Prompt Gamma Neutron Activation (PGNAA) systems require the use of a gamma-ray spectrometer to record the gamma-ray spectrum of an object under test and allow the determination of the object's composition.Field-portable systems, such as Idaho National Laboratory's PINS system, have used standard liquid-nitrogen-cooled high-purity germanium (HPGe) detectors to perform this function. These detectors have performed very well in the past, but the requirement of liquidnitrogen cooling limits their use to areas where liquid nitrogen is readily available or produced on-site. Also, having a relatively large volume of liquid nitrogen close to the detector can impact some assessments, possibly leading to a false detection of explosives or other nitrogen-containing chemical. Use of a mechanically-cooled HPGe detector is therefore very attractive for PGNAA applications where nitrogen detection is critical or where liquid-nitrogen logistics are problematic.Mechanically-cooled HPGe detectors constructed from ptype germanium, such as ORTEC's TransSpec, have been commercially available for several years. In order to assess whether these detectors would be suitable for use in a fielded PGNAA system, Idaho National Laboratory (INL) has been performing a number of tests of the resistance of mechanicallycooled HPGe detectors to neutron damage. These detectors have been standard commercially-available p-type HPGe detectors as well as prototype n-type HPGe detectors. These tests compare the performance of these different detector types as a function of crystal temperature and incident neutron fluence on the crystal.

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confidence: 99%