Results 141 to 150 of about 1,794 (181)

Performances of large volume p-type HPGe detectors

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1989
The performances of large volume (about 350 cm3 and relative efficiency greater than 75%) p-type HPGe detectors are reported. The response function to γ-rays up to 11.67 MeV, the energy dependence of the full energy detection efficiency and the timing properties have been measured.
BELLIA, Giorgio Concetto, A. DEL ZOPPPO, C. AGODI, R. ALBA, R. CONIGLIONE, E. MIGNECO, RUSSO, Giuseppe, P. SAPIENZA   +7 more
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Performance of a segmented HPGe detector at KRISS

Applied Radiation and Isotopes, 2018
A 24 segmented HPGe coaxial detector was set up with a digitized data acquisition system (DAQ). The DAQ was composed of a digitizer (5 × 107sampling/s), a Field-Programmable Gate Array (FPGA), and a real time operating system. The Full Width Half Maximum (FWHM), rise time, signal characteristics, and spectra of a 137Cs source were evaluated.
Jubong, Han, K B, Lee, Jong-Man, Lee, S H, Lee, Tae Soon, Park, J S, Oh   +5 more
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Development of a rugged HPGe detector

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1986
Abstract A rugged HPGe detector capable of taking high resolution data in a vibrational environment has been developed. The objectives included a detector with 35% gamma efficiency and 1.90 keV energy resolution (both quantities measured at 1332.5 keV), a dewar with a capacity of 1.2 l and a hold time of 24 h.
Louis A. Beach, Gary W. Phillips
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Segmented HPGe Detector for Nuclear Reactions Research

IEEE Transactions on Nuclear Science, 2021
In this article, development results from a new p-type high-purity germanium (HPGe) detector with a segmented n+-region are presented. The intended detector is used in spectrometry; however, its sixfold segmentation allows for the determination of the direction of individual photons emitted in the nuclear reactions from a source placed inside the ...
Alexander Sokolov, Vladimir Kondratjev, Rais Nurgalejev, Vladimir Gostilo, Viktor Brudanin, Dmitry Ponomarev, Sergey Rozov, Evgeny Yakushev   +7 more
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Modelling orthogonal strip HPGe detector systems

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2007
Abstract The development of orthogonal planar strip high purity germanium (HPGe) detectors offers the advantages of good energy and three dimensional spatial resolution of photon interactions. The use of such devices for Positron emission Tomography (PET) are being investigated by the SmartPET collaboration.
Paul R. Smith, Andrew Berry, Toby E. Beveridge, Chris J. Hall, John E. Gillam, Greg Potter, Paul J. Nolan, Robert A. Lewis   +7 more
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HPGe virtual point detector for radioactive disk sources

Applied Radiation and Isotopes, 2007
Validity of the model of a virtual point detector (implying existence of a point where all interactions virtually occur) was confirmed for measurements of radioactive disk sources with HPGe detectors. The existing correlation of the count rates with the distance between the virtual plain detector and the detector face makes it possible to inter- and ...
Z B, Alfassi, N, Lavi, O, Presler, V, Pushkarski   +3 more
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Determination of dead-layer variation in HPGe detectors

Applied Radiation and Isotopes, 2014
The dead-layer uniformity of the top surface of two high purity germanium detectors has been studied using a novel automated scanning set-up that allows a fine-grained topography of a detector's top and lateral surfaces. Comparisons between measurements and Monte Carlo simulations allowed implementation of a dead-layer variation into the detector model,
E. Andreotti, M. Hult, G. Marissens, G. Lutter, GARFAGNINI, ALBERTO, HEMMER, SABINE ELISABETH, VON STURM ZU VEHLINGEN, KATHARINA CACILIE   +6 more
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Characterization of HPGe detectors using Computed Tomography

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2015
Computed Tomography (CT) high resolution imaging have been used to investigate if there is a significant change in the crystal-to-window distance, i.e. the air gap thickness, in a small n-type detector cooled to 77 K, and in a medium sized p-type HPGe detector when cooled to 100 K. The findings were compared to detector dimension data made available by
A. Hedman, J. Bahar Gogani, M. Granström, L. Johansson, J.S. Andersson, H. Ramebäck   +5 more
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Experience with a factory-calibrated HPGe detector

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2006
Abstract For k0-based analysis, an HPGe detector has to be used. This detector has to be absolutely calibrated in a reference position and with a defined geometry so that, using SOLCOI/KAYZERO software package, for example, efficiencies of other positions and sample geometries can be calculated.
D.A.W. Bossus, J.J.J.M. Swagten, P.A.M. Kleinjans   +2 more
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Characterization of a large HPGe coaxial detector

Nuclear Instruments and Methods, 1980
Abstract The characterization of a HPGe coaxial detector with a relative efficiency of 35% is reported. Energy resolution measurements at 1.33 and 6.609 MeV were made along with measurements of the timing properties. The results were 1.77 keV fwhm at 1.33 MeV; 3.8 keV at 6.609 MeV and 4.3 ns timing resolution at 1.17 MeV.
Thomas W. Raudorf, Thomas J. Paulus, Rex C. Trammell   +2 more
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