We present a new concept for c-ray detector arrays. An example, called GRETA (Gamma-Ray Energy Tracking Array), consists of highly segmented HPGe detectors covering 4p solid angle. The new feature is the ability to track the scattering sequence of incident c-rays and in every event, this potentially allows one to measure with high resolution the energy deposited, the location (incident angle) a...

The technical details and performance of the newly developed Sandwich spectrometer for ultra low-level gamma-ray spectrometry are presented. The spectrometer, which consists of two HPGe detectors, an active muon shield and a lead/copper shield with a convenient and rapid opening mechanism, is located in an underground laboratory at a depth of 500 m water equivalent. The data is collected in lis...

Portable, high-resolution gamma spectroscopy has long been a vital technique in routine safeguards accountancy. The high resolution enables the spectrum analysis to accurately determine the isotopic content of the sample. All currently deployed systems for this application are based on liquid-nitrogen cooled, high-purity germanium (HPGe) detectors, with the spectrum analysis performed on portab...

Prompt gamma-ray neutron activation analysis (PGNAA) is now a proven method for the identification of chemical warfare agents and explosives in military projectiles and storage containers. Idaho National Laboratory is developing a next-generation PGNAA instrument based on the new Ortec Detective mechanically-cooled HPGe detector and a neutron generator. In this paper we review PGNAA analysis of...

Abstract The realization of pulsed-laser diffused, thin n $$+$$ + contacts on high purity germanium (HPGe) and their successful segmentation is described. have been obtained by a laser-induced diffusion Sb atoms, deposited sputtering Ge surface, then segmented means photolithographic technique. Three small pr...

Throughout the years, an optimizing counting conditions and optimum background region width determination has been carried out by several methods in gamma-ray spectroscopy. The effect of various widths focus on digital integration photopeak analysis. As application tool this nuclear physics, radioactive sources mostly used lower or higher resolution detectors; such as NaI(Tl) HPGe detectors. Th...

Excited states of the $^{203}\mathrm{Po}$ ($Z=84,N=119$) have been investigated after populating them through $^{194}\mathrm{Pt}(^{13}\mathrm{C},4n)$ fusion-evaporation reaction at ${\mathrm{E}}_{\mathrm{beam}}=74$ MeV and using a large array Compton-suppressed HPGe clover detectors as detection setup for emitted $\ensuremath{\gamma}$ rays. Standard techniques $\ensuremath{\gamma}$-ray spectros...

High-resolution, germanium detectors (HPGe) have long been used for radionuclide characterization of nuclear sites, both buildings and large areas, for the purpose of cleaning up the site. Several systems consisting of a detector, mobile support, collimators and software for data collection and spectrum analysis have been made by national laboratories and commercial companies. The efficacy of t...

Among the secondary detection effects in gamma-ray spectroscopy with HPGe detectors that reduce the peak area and must be properly taken into account in accurate measurements, the less well known is counting loss by beta and gamma-ray sum coincidence. The fraction of lost counts was estimated assuming that a photon detection event can sum either with the coincident beta-ray or its bremsstrahlun...