Position resolution simulations for the inverted-coaxial germanium detector, SIGMA

Improving Germanium Detector Resolution and Reliability

High purity germanium (HPGe) detectors used in radionuclide assay systems such as Radionuclide Aerosol Sampler/Analyzer (RASA) systems must operate unattended for long periods of time. Currently, the performance and reliability of commercially available large (~100%) HPGe detectors are acceptable for the majority of laboratory applications. However, for remote systems designed for nuclear deton...

Gamma ray polarimetry using a position sensitive germanium detector

Imaging gamma-ray detectors make sensitive polarimeters in the Compton energy regime by measuring the scatter direction of gamma-rays. The principle is to capitalize on the angular dependence of the Compton scattering cross section to polarized gamma rays and measure the distribution of scatter directions within the detector. This technique is effective in a double-sided germanium detector betw...

Experimental Studies of Inverted - Profile Coaxial Jet Flows

Monte Carlo simulation of the X-ray response of a germanium microstrip detector with energy and position resolution

We present Monte Carlo computer simulations of the X-ray response of a micro-strip germanium detector over the energy range 30}100 keV. The detector consists of a linear array of lithographically de"ned 150 lm wide strips on a high purity monolithic germanium crystal of 6 mm thickness. The simulation code is divided into two parts. We "rst consider a 10 lm wide X-ray beam striking the detector ...

Gamma-ray imaging with coaxial HPGe detector

We report on the first experimental demonstration of Compton imaging of gamma rays with a single coaxial high-purity germanium (HPGe) detector. This imaging capability is realized by two-dimensional segmentation of the outside contact in combination with digital pulse-shape analysis, which enables to image gamma rays in 4p without employing a collimator. We are able to demonstrate the ability t...