For unknown radionuclide identification, it is important that a high purity germanium (HPGe) spectrometry system be calibrated correctly for energy. The energy calibration of an HPGe spectrometry system will drift over time due to a variety of factors including the ambient temperature, the line voltage applied to the system, variation in the ...
Cutout view of the proposed detector concept. An HPGe crystal of true coaxial geometry with (electronic) segmentation in four azimuthal zones, two of which are intended for localization of the first interaction of the gamma ray (scattering segments), and two are intended for capturing the energy deposition of subsequent gamma-ray …
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where t meas is the overall measurement time during which the γ-rays emitted in the decay of the excited states of the decay products are measured by the HPGe detector array.. Equation (3) implies that the number of expected decays scales linearly with respect to the measurement time t meas.Since the plasma parameters can be kept constant over …
a passivation layer to protect the crystalline HPGe beneath. The technique has been used to produce large planar strip HPGe detectors by Mark Amman at the Lawrence Berke-ley National Laboratory (LBNL) [35] to detect soft γ-rays (0.2–5 MeV) in the COSI [36,37] experiment. The proper-ties of thin contacts have been thoroughly examined [37] and
Typically an HPGe detector consists of a single piece of HPGe with two electrical contacts fabricated on it for bias application and charge collection. These contacts must block …
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ORTEC provides a comprehensive suite of HPGe radiation detector solutions covering an extensive range of energies and for a variety of applications. Learn more about ORTEC's High Purity Germanium …
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Section snippets Large efficiency HPGe detectors. The effective interaction volume of the detector determines its efficiency. Advancement in spectroscopy grade HPGe crystal over the past few years has, therefore, been made in improving the crystallographic properties, lowering the impurity concentrations with greater axial uniformity and …
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In this paper, internal geometry and structure except for dead layers of the HPGe detector is obtained by X-ray radiography and 3D reconstruction. The optimal dead layers of the …
1. Introduction. For decades, radiation detectors based on high-purity Ge (HPGe) have been the preeminent technology for gamma-ray spectroscopy when excellent energy resolution and good efficiency are required [1], [2], [3], [4].Detectors of this type that are used solely for spectroscopy can be simple in design and typically consist of a single …
HPGe crystal to prevent the diamond saw blade from cutting into a metal plate of stainless steel. For mounting the small crystal, a hot plate was used to heat sticky wax to hold the graphite plate between a stainless-steel plate and the HPGe crystal. Figure 2c shows several well-cut small pieces after the cutting process.
HPGe provides positive identifications Due to its far superior resolution, HPGe is the only radiation detection technology that provides sufficient information to accurately and reliably identify radionuclides from their passive gamma ray emissions. HPGe detectors have 20-30 times better resolution than NaI detectors. Also, unlike
a passivation layer to protect the crystalline HPGe beneath. The technique has been used to produce large planar strip HPGe detectors by Mark Amman at the Lawrence Berke-ley …
For HPGe and CZT CCs in which all detector effect were included, the DCA was less than 3 mm for 75% and 68% of the detected gammas, respectively, and restricting gammas to those having energy greater than 2.0 MeV increased these percentages to 83% and 77% for HPGe and CZT, respectively. Distributions of the true gamma origins and the PCA after ...
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Introduction The dead layer thickness provided by the manufacturer increases with the aging of the HPGe detector; the increase of dead layer thickness leads to the decrease in the detector's efficiency, not only due to gamma rays attenuation in the dead layer but also due to the reduction of the active volume of the detector. Purpose In this …
Purpose: To demonstrate the measurement of gamma-ray energies with high resolution provided by a High-purity Germanium (HPGe) detector. Semiconductor detectors made …
Open the ProSpect Gamma Spectroscopy Software and connect to the HPGe detector. 4. Configure the MCA settings as listed in Table 7-1. 5. Use the software to apply the recommended detector bias to the HPGe detector. This can be found on the detector specification sheet or listed on the side of the detector itself. 6.
of a broad-energy HPGe detector is presented, and simu-lations of various samples are compared to experimental data. These are found to be accurate within 3 % at a con …
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