Large volume HPGe detectors are commonly used in applications that require good energy resolution and high detection efficiency, but are expensive and difficult to grow. Clover detectors consisting of 4 smaller crystals in a common cryostat are a possible alternative, but traditionally require complex readout electronics. In contrast, the DGF Pixie-4 is a compact, digital spectrometer providing...

The background of a High Purity Germanium (HPGe) detector measured in deep underground laboratory was investigated analytically and by Monte Carlo simulations using the GEANT4 toolkit. Contributions different sources to experimental γ-ray were determined. Namely, contribution radionuclides materials around detector, neutrons produced (α, n) reactions due presence rock concrete spontaneous fissi...

Radioactivity of the nuclides U, Ra, Th and K was measured in soil by γ-ray spectrometry using HPGe detector. A criterion was set in order to analyse soil samples from plain, semi-hilly and hilly areas in northern India. More than three γ-ray energy peaks were used for the determination of Ra and Th activity concentrations to obtain more accurate results. Some of these peaks have interfering en...

Calibrations of an HPGe detector were made with respect to photon energy and angle of incidence for the use in field gamma spectrometry. The same detector was modelled in MCNP4C and simulated. This revealed some significant differences between the theoretical (simulated) efficiency and the measured efficiency of the detector, especially at lower energies. In order to investigate the reason for ...

Background: Inspection of the level of radioactivity from radionuclides in soil is important for the assessment of the exposure to natural radiation. Materials and Methods: Ten samples from soil were collected from different sites of Kirkuk-IRAQ and the level of natural radioactivity was measured using gamma-ray spectrometry based on a high purity germanium (HPGe) detector. Results: It was foun...

We report on a study of the performance DEGAS-FATIMA Hybrid setup through GEANT4 simulations using accurate geometries all detector components. give details most compact configuration considered for this when maximizing efficiencies both DEGAS (HpGe) and FATIMA (LaBr3(Ce)) systems with respect to heavy-ion implantation β-decay station. The possible configurations system are discussed in terms t...

Proper characterization of waste is important to reduce the costs of disposal. The requirement for short data collection time often means putting the detector as close to the waste container as possible. Nondestructive assay of gamma ray emitting nuclear waste requires modeling because preparing a standard to match the physical and radiological properties of any waste item is not possible. Seve...

A 300kBq Na source is placed between the front surface of planar detector and the position sensitive detector (PSD) as shown in figure 1(a). This source emits pairs of 511 keV positron annihilation photons in opposite directions. The germanium detector is placed in the focal plane of the system at a distance of 15 cm from the source whereas the PSD is at 5 cm from it in order to cover the full ...

Abstract In this study, the effect of various types fertilizers on natural radioactivity levels in agricultural soil was investigated research. The activity concentration 226Ra, 232Th, and 40K fertilizer samples were determined by using gamma-ray spectroscopy a high-purity germanium (HPGe) detector to determine concentrations 40K. for phosphate raw (2300-5400) Bq/kg, (9-53) (56-3000) respective...