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Application of Germanium Detectors | nuclear-power.com

HPGe detector with LN2 cryostat Source: canberra.com. Germanium-based semiconductor detectors are most commonly used where a very good energy resolution is required, especially for gamma spectroscopy, as well as x-ray spectroscopy.In gamma spectroscopy, germanium is preferred due to its atomic number being much higher than silicon and which increases the …

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Axion Detection with Germanium Detectors

Germanium detectors Semiconductor detectors Germanium data collection process Detector characteristics I measured Leakage current Detector Capacitance Crystal axis orientation 2 Image Credit: MAJORANA Collaboration . NEUTRINOLESS DOUBLE BETA DECAY

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Radium isotope measurements using germanium detectors ...

Recent advances in sampling and counting techniques have provided the means of measuring 226 Ra, 228 Ra and 224 Ra at low activities in natural waters. Samples are preconcentrated in the field by adsorbing radium on a fibre coated with manganese oxides. Absolute activities and activity ratios are measured using germanium detectors supplemented in some cases by …

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Characterization of high-purity germanium detectors with ...

Jul 24, 2020· For the first time, planar high-purity germanium detectors with thin amorphous germanium contacts were successfully operated directly in liquid nitrogen and liquid argon in a cryostat at the Max-Planck-Institut für Physics in Munich. The detectors were fabricated at the Lawrence Berkeley National Laboratory and the University of South Dakota, using crystals …

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Measurement of Germanium Detector Efficiency

The germanium (Ge) detector is a counting detector and is the instrument that we will be ... efficiency needs to be measured. Once this is done and the detector is calibrated, activity runs on . the new 60Fe and 60Co samples can begin. When we …

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Neutron-capture cross-sections of 244Cm and 246Cm …

ARTICLE Neutron-capture cross-sections of 244Cm and 246Cm measured with an array of large germanium detectors in the ANNRI at J-PARC/MLF Atsushi Kimuraa*, Toshiyuki Fujiib, Satoshi Fukutanib, Kazuyoshi Furutakaa, Shinji Gokoa{, Kaoru Y. Haraa, Hideo Haradaa, Kentaro Hirosea, Jun-ichi Horib, Masayuki Igashirac, Takashi Kamiyamad, Tatsuya Katabuchic, ...

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High Purity Germanium (HPGe) Radiation Detectors ...

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 Radiation Detectors (HPGe) today.

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GAMMA SPECTROSCOPY - OVERVIEW

Jun 01, 2011· Detector Types • The most common (not the only) detectors in gamma spectroscopy systems: - Sodium Iodide (NaI) - Lanthanum Bromide (LaBr) 21 Lanthanum Bromide (LaBr) - High Purity Germanium (HPGe) • Of these, the HPGe is easily the best. • A LaBr detector is generally preferable to a NaI detector.

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Toward a CEvNS Measurement with Germanium

•COHERENT has deployed other detectors (CsI, Ar, NaI) to measure CEvNS and a germanium detector will soon be added. •Backgrounds are being measured and will inform shielding package •The physics potential for low-threshold, low background Ge detectors at the SNS is very high! J. Daughhetee, J. Raybern | COHERENT | April APS 2018 11 Summary

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Pulse Shape Analysis with a Broad-Energy Germanium ...

Pulse Shape Analysis with a Broad-Energy Germanium Detector for ... READ. While the events in the double-escape peak of 208 Tl do not ... difference in accepted fraction of events is expected to be. relatively small. The isotopes measured represent the kind of. backgrounds expected in the materials surrounding the. detectors in the GERDA and ...

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Application of Germanium Detectors to Environmental Monitoring

The cost of germanium detectors, disregarding electronics and analytical systems, varies with the size and type of detector. Germanium detectors suitable for environmental analyses may range in cost from about $6000 for a small-volume, coaxial Ge(Li) (about 9 percent) detector to more than $30,000 for a large-volume Ge(Li) or HPGe detector.

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Chapter 8 Hyper-Pure Germanium Detector

germanium detector for a long time. Although there is little difference in detector performance between HPGe and Ge(Li), the maintenance of Ge(Li) is pretty inconvenient, which has made manufacturers stop producing them. 8.2. Configurations A. Hyper-Pure Germanium (HPGe) detector fabrication [4] HPGe crystal were first developed in the mid 1970s.

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A hybrid method to determine efficiency curve of HPGe ...

A method was developed for determining the efficiency calibration curve of HPGe detectors between 26 and 1770 keV. A simple simulation based on the attenuation of gamma-rays in pure germanium was used together with efficiency calibrations performed for three detector-source distances: 5, 12 and 30 cm.

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High performance planar germanium-on-silicon single-photon ...

Mar 06, 2019· By incorporating germanium, single-photon avalanche diode detectors using silicon-based platforms are applied to infrared light detection. Here, a cost-effective planar detector geometry is ...

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Performance of A Compact Multi-crystal High-purity ...

Feb 18, 2015· The Multi-sensor Airborne Radiation Survey (MARS) detector is a 14-crystal array of high-purity germanium (HPGe) detectors housed in a single cryostat. The array was used to measure the astrophysical S-factor for the 14 N(p,γ) 15 O* reaction for several transition energies at an effective center of mass energy of 163 keV.

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Induced Radioactivity Measured in a Germanium Detector ...

Induced Radioactivity Measured in a Germanium Detector After a Long Duration Balloon Flight A 13-day long duration balloon flight carrying a germanium detector was flown from Williams Field, Antartica in December 1992. After recovery of the payload the activity induced in the detector was measured.

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Gamma spectroscopy - Wikipedia

Gamma-ray spectroscopy is the quantitative study of the energy spectra of gamma-ray sources, such as in the nuclear industry, geochemical investigation, and astrophysics.. Most radioactive sources produce gamma rays, which are of various energies and intensities. When these emissions are detected and analyzed with a spectroscopy system, a gamma-ray energy …

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Gamma Spectroscopy with Germanium Detectors

B. C1 Germanium Detector C1 is a Reverse Electrode coaxial Germanium (REGe) detector manufactured by Canberra Industries owned by ... keV to a measured 5.8 keV. This radiation damage has seemingly also hurt the e ciency of the detector, or the ratio of detected events to actual events, though this has ...

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Germanium as Semiconductor - Properties and Characteristics

Since germanium detectors produce the highest resolution commonly available today, they are used to measure radiation in a variety of applications including personnel and environmental monitoring for radioactive contamination, medical applications, radiometric assay, nuclear security and nuclear plant safety.

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Energy and Efficiency Calibrations for High Purity ...

by mounting the germanium crystal in a vacuum cryostat, thermally connected to a copper rod or "cold finger" [9], [10]. Majority of this type of detectors are the coaxial detector which in NAA is useful for measurement of gamma-rays with energies ranging from about 60 keV 4.0 to MeV [11].

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EFFICIENCY AND RESOLUTION OF GERMANIUM …

Table 1. Detectors Studied Detector Number Diameter (mm) Length (mm) N21240A 60.5 60.4 N31626B 53.0 47.8 P41075A 84.5 100.5 P41182A 86.1 112.4 P41181A 81.5 53.7 EFFICIENCY AND RESOLUTION OF GERMANIUM DETECTORS AS A FUNCTION OF ENERGY AND INCIDENT GEOMETRY R.M. Keyser New Product Development, ORTEC, 801 South Illinois …

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GERDA: The Germanium Detector Array - YouTube

Next to photons, neutrinos are the most abundant particles in the universe. Still, they are almost invisible to us since they interact with matter extremely ...

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Monte Carlo Calculations of the Intrinsic Detector ...

measured with silicon and germanium detectors are within 7% of the simulated spectra. The results from our simulations indicate that we should observe a …

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Investigation of Energy Responses of Germanium Detectors ...

of 21 germanium detectors for incident X-ray energies up to 300 keV. The Compton continuum distributions were fitted by polynomials with a least-squares method. We employed a simulation procedure to evaluate two methods which correct a measured spectrum for the distortion by the detector energy response; one uses a response

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Final Report for Monitoring of Reactor Antineutrinos with ...

• Present low -energy threshold germanium detectors operated at a nuclear reactor show an energy threshold of 500 eV. • Laboratory operation has demonstrated a best energy threshold of 300 eV with this detector. This is more than an order of magnitude below the low-energy threshold of comparable mass detectors.

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Use of a germanium detector to optimize scatter correction ...

A collimated germanium detector with an energy resolution of 1 keV full width at half maximum at 140 keV was used to measure the energy spectrum of radiation emitted from a test object containing an asymmetric distribution of 99mTc and nonuniform attenuation. Energy spectra were recorded from 24 positions around the object and convolved with ...

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Detector Assemblies - Labsphere | Internationally ...

Germanium Detector Assembly: GDA-050-U-RTA-CX The germanium detector assembly monitors radiation in an integrating sphere. The high-quality photodiode is designed for the 800 to 1800 nm wavelength range. The detector has high responsivity, good linearity, fast response times, and excellent long-term stability.

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IMPROVING GERMANIUM DETECTOR RESOLUTION AND …

The goals of this research include improving germanium detector reliability and resolution performance by developing new surface passivation techniques coupled with a unique detector contact arrangement. A major reliability improvement would be realized if germanium detectors were made less ... detector assemblies will be measured at each ...

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Germanium Avalanche Photodiodes - GPD Optoelectronics

Germanium photodiodes are commonly used to measure optical power in the NIR range, especially in cost-sensitive applications or where a large-area detector is needed. However, germanium detectors have a lower shunt resistance and higher dark current than similarly-sized InGaAs detectors, resulting in higher noise levels overall.

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X-Ray Data Booklet Section 4.5 X-RAY DETECTORS

Gas ionization detectors are commonly used as integrating detectors to measure beam flux rather than individual photons. A typical detector consists of a rectangular gas cell with thin entrance and exit windows. Inside the detector, an electric field of about 100 V/cm is applied across two ... germanium detectors are made from zone-refined ...

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Neutron-capture cross-sections of 244Cm and 246Cm measured ...

Jun 22, 2012· The neutron neutron-capture cross cross-sections of 244 Cm and 246 Cm were measured by the time-of-flight method in the energy range of 1–300 300 eV with an array of large germanium detectors in the Accurate Neutron-Nucleus Reaction measurement InstrumentANNRI at Material and Life Science Experimental Facility (MLF) of the Japan …

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Photodiodes - Thorlabs

Jul 13, 2021· The experimental setup was designed to ensure a constant reverse-bias voltage across the photodiode, control the temperature of the detector, block light from reaching the detector, and establish an electrical path between the detector and the Keithley 6487 ammeter that isolated the measured current from extraneous electromagnetic interference ...

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Germanium Detectors - Mirion

Germanium detectors are semiconductor diodes having a p-i-n structure in which the intrinsic (i) region is sensitive to ionizing radiation, particularly x rays and gamma rays. Under reverse bias, an electric field extends across the intrinsic or depleted region. When photons interact with the material within the depleted volume of a detector ...

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