Results 171 to 180 of about 24,202 (229)

MODELING AND OPTIMIZATION OF HPGE DETECTOR GC0518 USING MCNP5 CODE.

Radiation Protection Dosimetry, 2022
For precise modeling of a high purity germanium (HPGe) detector, detailed knowledge of its geometry is necessary. Unfortunately, some of the detector geometric parameters are often not available.
Branislav Stríbrnský, R. Hinca, G. Farkaš, M. Petriska, V. Slugen   +4 more
semanticscholar   +1 more source

Measurement the natural radioactivity concentration levels of radionuclides in selected vegetables collected from Kirkuk, Iraq using HPGe detector

International Journal of Environmental Analytical Chemistry, 2021
The aim of this study is to determine the natural radioactivity levels and evaluate the radiological hazard in vegetable samples collected from Kirkuk city by using gamma-ray spectrometer HPGe. The results show that the highest specific activity of 226Ra
N. Salih
semanticscholar   +1 more source

Annealing restoration of HPGe detector

Radiation Detection Technology and Methods, 2020
HPGe detector is used widely, its property is affected by neutron. Annealing to the germanium crystal is a good approach to recover the detector. To raise the temperature of germanium crystal to recover the resolution for the HPGe detector. A special copper ingot is designed and manufactured to increase the heating efficiency.
Jianyong Zhang, Xiaohu Mo, Xiao Cai
openaire   +1 more source

HPGe in Magnetic Fields

Nuclear Physics News, 2010
The advent of high purity germanium (HPGe) crystals more than 40 years ago represents a fundamental milestone in experimental Nuclear Physics: the new detectors, capable of featuring an energy resolution superior by more than an order of magnitude with respect to other devices, led to a new level of γ-ray spectroscopy data quality.
Tullio Bressani, Alessandro Feliciello
openaire   +1 more source

Passivation of HPGe detectors

Instruments and Experimental Techniques, 2009
Protective oxide coating of p-n junctions in HPGe detectors is investigated. Owing to this coating, HPGe detectors can be used, in particular, in liquid nitrogen environment without capsulation. A simple and practically feasible method for forming the protective layer by processing detectors in methanol is described.
Yu. B. Gurov, V. S. Karpukhin, S. V. Rozov, V. G. Sandukovsky, D. Borowicz, J. Kwiatkowska, B. Rajchel, J. Yurkowski   +7 more
openaire   +1 more source

Low background shielding of HPGe detector

Applied Radiation and Isotopes, 2009
National Radiation Protection Institute in Prague is equipped with 14 HPGe detectors with relative efficiency up to 150%. Steel shielding with one of these detectors (relative efficiency 100%) was chosen to be rebuilt to decrease minimum detectable activity (MDA).
L, Trnková, P, Rulík
openaire   +2 more sources

Low-temperature HPGe detectors

Czechoslovak Journal of Physics, 1996
Several planar HPGe detectors with sensitive thickness ranging from 1.2 to 7.3 mm were produced by relatively simple technology using vacuum evaporation and diffusion and repeatedly tested at LHe temperature. Good reproducibility and stable performance of detectors was observed and the resolution for both conversion electrons and γ-rays at 5 K did not ...
Dalibor Zákoucký, Dušan Srnka, Jaromír Šlesinger, Drahoslav Vénos, Josef Stehno   +4 more
openaire   +1 more source

Spectrometric performance of a HPGe semi-planar detector with large diameter

, 2021
We present the results of the development of the technology for the growth of HPGe ingots with a diameter of 110–120 mm and the characteristics of the first detector made of a crystal of this diameter. A semi-planar detector with a crystal size of 110x35 
R. Nurgalejev, S. Pohuliai, A. Sokolov, V. Gostilo, J. Vanpaemel   +4 more
semanticscholar   +1 more source

Fast neutron sensitivity with HPGe

2007 IEEE Nuclear Science Symposium Conference Record, 2007
In addition to being excellent gamma-ray detectors, germanium detectors are also sensitive to fast neutrons. Incident neutrons undergo inelastic scattering {Ge(n,n')Ge*} off germanium nuclei and the resulting excited states emit gamma rays or conversion electrons.
Allen Seifert, Walter K. Hensley, Edward R. Siciliano, W. Karl Pitts   +3 more
openaire   +1 more source

Off-center efficiency of HPGe detectors

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2002
The gamma ray detection efficiency of two HPGe detectors for off-center points was measured both on the detector's cap and outside the detector's cap. It was found that similar to measurements on the detector symmetry axis, for off-center measurements including those outside the detector cap also, the detector could be treated as an effective point ...
O. Presler, O. Peled, U. German, Y. Leichter, Z.B. Alfassi   +4 more
openaire   +1 more source