Results 171 to 180 of about 17,127 (187)
Some of the next articles are maybe not open access.
Direct-reaction studies by particle-γ coincidence spectroscopy using Csi-Hpge and Si-Hpge arrays
AIP Conference Proceedings, 2013Particle-γ and particle-γ-γ coincidence spectroscopy has several advantages in the study of direct reactions (particularly in inverse kinematics) since it can generally allow determination of: decay paths; high-precision level energies; multipolarities of transitions; and cross sections.
openaire +1 more source
Development of a rugged HPGe detector
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1986Abstract 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
openaire +1 more source
Modelling orthogonal strip HPGe detector systems
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2007Abstract 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 +7 more
openaire +1 more source
HPGe virtual point detector for radioactive disk sources
Applied Radiation and Isotopes, 2007Validity 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 +3 more
openaire +2 more sources
Radionuclide Measurement Using HPGe Gamma Spectrometry
2006In this chapter we have outlined the basic methodology, equipment, and software necessary to determine activities of 137Cs and other gamma-emitting radionuclides using HPGe gamma-spectrometry methods. The analysis of radioactivity in samples at environmental levels is a complex task.
P. J. Wallbrink, D. E. Walling, Q. He
openaire +1 more source
Calculation of the volume of an HPGe crystal
Radiation Protection Dosimetry, 2011An important characteristic of a high-purity germanium detector for gamma spectrometry is the volume of the crystal, which relates to the detection efficiency and to the measured background level. The crystal dimensions provided by the detector manufacturer were used to calculate the crystal volume.
Y, Nir-El, D, Har-Even
openaire +2 more sources
Determination of dead-layer variation in HPGe detectors
Applied Radiation and Isotopes, 2014The 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 +6 more
openaire +2 more sources
A very long-term HPGe-background gamma spectrum
Applied Radiation and Isotopes, 2005Background gamma spectra, taken with one HPGe detector between 1987 and 2003, are summed up to represent a total collect time of 1.03x10(8) s. Standard background gamma lines belonging to the natural decay series as well as more uncommon ones are identified. A high temporal variability of the background lines related to radon decay products is found in
openaire +2 more sources
‘Universal’ representation of HPGe detector efficiencies
Radiation Measurements, 2016Abstract By fitting a simple 4-parameter function to twelve sets of HPGe detector efficiency measurements, an approximate ‘universal’ expression good to ±15% is obtained for HPGe absolute full-energy-peak efficiencies as a function of photon energy between ∼125 and ∼1750 keV for a ∼4-to-1 range of crystal volumes and for coaxial and planar crystal ...
openaire +1 more source