Results 181 to 190 of about 24,202 (229)

Risetime measurement of HPGe detector pulses

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1987
Abstract A new method of measuring the risetime and its distribution of HPGe detector pulses using only one fast comparator, a delay line shorted at one end and a few discrete components is described. Setting 10% and 90% of the pulse height is easier and definite. The calibration procedure is also simple.
Suvendu Bose, Mihir B. Chatterjee, Bedanta K. Sinha, Rangalal Bhattacharya   +3 more
openaire   +1 more source

Analysis of natural radionuclides and 137Cs using HPGe spectrometer and radiological hazards assessment for Al-Nigella site, Egypt

, 2020
This study aims to evaluate the specific activity levels in soil and shore-sediment samples due to natural radionuclides; 238U, 232Th and 40K, and man-made 137Cs of Al–Nigella site, Marsa Matrouh g...
Ahmed N. Shabaka, A. Omar, S. El-Mongy, A. F. Tawfic   +3 more
semanticscholar   +1 more source

Characterization of Uranium Ore Samples by HPGe Gamma-Ray Spectroscopy

IEEE Transactions on Nuclear Science, 2020
Gamma logging for uranium exploration is currently based on total counting with the Geiger–Müller gas detectors or NaI(Tl) scintillators. However, the total count rate interpretation in terms of uranium concentration may be impaired in case of roll ...
T. Marchais, B. Pérot, C. Carasco, Jean-Luc Ma, P. Allinei, H. Toubon, R. Goupillou, J. Collot   +7 more
semanticscholar   +1 more source

HPGe detector preamplifier output pulse simulator

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1989
Abstract The pulse simulator described here can be used to simulate the output pulses of a large HPGe detector preamplifier combination. A number of such simulators can be used to obtain pulses having a fixed time origin but with randomly varying risetime.
Suvendu Bose, Rangalal Bhattacharya
openaire   +1 more source

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
openaire   +2 more sources

Method applied for the HPGe detector

2013 3rd International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and their Applications (ANIMMA), 2013
Gamma ray spectrometry is a passive non destructive assay most commonly used to identify and quantify the radionuclides present in the complex huge objects such as nuclear waste packages. The treatment of spectra from the measurement of nuclear waste is performed in two steps: the first step is to extract the raw data from the spectra (energies and net
Nicolas Guillot, Mathieu Monestier, Nicolas Saurel   +2 more
openaire   +1 more source

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
openaire   +2 more sources

Timing properties of coaxial HPGe detectors

Nuclear Instruments and Methods, 1978
Abstract The dependence of the timing characteristics of a true coaxial HPGe detector on bias has been determined. Optimum performance of 2.0 ns fwhm and 4.25 ns fwtm was obtained at a bias just above the depletion voltage. The general variation of timing characteristics is compared with the results of a model of the pulse generation process in the ...
B.C. Robertson, H.L. Malm
openaire   +1 more source

Experimental determination of the HPGe spectrometer efficiency curve

Applied Radiation and Isotopes, 2008
A review of the calibration procedures of the semiconductor HPGe spectrometer is presented in this paper. Calibration standards were prepared using the standardized radioactive solution of the common monoenergetic radionuclides mixture and standardized multigamma (152)Eu solution.
Vukanac, Ivana, Đurašević, Mirjana M., Kandić, Aleksandar, Novković, Dušan N., Nađđerđ, Laslo, Milošević, Zoran   +5 more
openaire   +3 more sources

AGATA: The European HPGe tracking array

AIP Conference Proceedings, 2007
The future experiments on γ spectroscopy need more advanced detection techniques than those typically used for stable beams. In fact, very often the studied nucleus is characterized by very high velocity (up to relativistic energy) and the conditions on the background must be very severe.
openaire   +1 more source