A prototype gamma-ray scanning system was designed to perform post-irradiation examination measurements of nuclear fuel. The is composed a coaxial high-purity germanium (HPGe) detector, collimator, and mechanical positioning stages that translate the fuel sample across front collimator. This paper documents design process, modeling laboratory characterization performed validate system. done usi...

In diagnostic X-ray computed tomography (CT) imaging, some applications, such as dose measurement using the Monte Carlo method and material decomposition dual/multi-energy approaches, rely on accurate knowledge of energy spectrum beam. this regard, detectors providing an estimation could greatly impact quality CT imaging patient-specific dosimetry. The aim study is to estimate intrinsic efficie...

Compton suppression system was established to accurately and precisely measure low-level radiation during insitu measurement of sites. HPGe detector was selected as the main detector and plastics scintillation detector was selected as the guard detector. Using Cs source, while changing the height(h) and width(w) about plastic scintillation detector the gamma spectrum was simulated using the Mon...

DETECTOR RESOLUTION Resolution is a measure of the width (full width half max) of a single energy peak at a specific energy, either expressed in absolute keV (as with Germanium Detectors), or as a percentage of the energy at that point (Sodium Iodide Detectors). Better (lower FWHM value) resolution enables the system to more clearly separate the peaks within a spectrum. Figure 1.2 shows two spe...

DETECTOR RESOLUTION Resolution is a measure of the width (full width half max) of a single energy peak at a specific energy, either expressed in absolute keV (as with Germanium Detectors), or as a percentage of the energy at that point (Sodium Iodide Detectors). Better (lower FWHM value) resolution enables the system to more clearly separate the peaks within a spectrum. Figure 1.2 shows two spe...

Non-linearities in the energy response of gas detectors in the regions of the absorption edges of the detection medium are well documented. Monte Carlo calculations show that the non-linearity results from differences in efficiencies for converting absorbed radiation into ionisation for different atomic sub-shells. Energy non-linearity in germanium-based solid-state detectors in the region of t...

The Heidelberg Dark Matter Search (HDMS) is an experiment designed for the search for WIMP dark matter. It is using a special configuration of Ge detectors, to efficiently reduce the background in the low-energy region below 100 keV. After one year of running the HDMS detector prototype in the Gran Sasso Underground Laboratory, the inner crystal of the detector has been replaced with a HPGe cry...

This paper presents a simulation of the spectroscopic performance of two large CZT coplanar detectors, 1.5 1.5 cm area and 1.0 cm thick, with coplanar anodes. A code, based on the GEANT libraries and classical Monte Carlo sampling, was developed to simulate experimental scenarios. This code adapts the GEANT capabilities for simulating complex detection systems for spectroscopic studies. Detecto...