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High-purity Germanium (HPGe) Detectors - CANBERRA Industries

High-purity Germanium (HPGe) Detectors - CANBERRA Industries


Cryostats, coolers & options · Detector Shields · Silicon Lithium Si(Li) Detectors · Special Ge and Silicon ... Since April 2017, all HPGe detectors with RC-feedback have been shipping with the ... Standard Electrode Coaxial Ge Detectors (SEGe) ..... these detectors must be cooled in order to reduce the thermal generation of ...

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The result is a versatile detector that can deliver reductions in count time, through improvements in minimum detectable concentrationactivity (mdcmda), for a range of sample sizes and geometries counted inside the well, on the end cap or in marinelli beakers. In any case, a wide range of available canberra cryostats allows optimizing the detector configuration for your application. Since edges are generally well separated in energy, x-ray absorption is a technique which can uniquely probe the environment of any element from carbon through the transuranics.

Packing density is an important factor in applications requiring an optimized solid angle and best fit to detection area. The sensitive detector surfaces are thus protected from moisture and condensible contaminants. Bingham, perkinelmer instruments-ortec (ans 2001) a new method for counting loss correction with uncertainty in gamma spectroscopy applications d.

Indeed, this ensures good resolution and peak shape over the entire mid-range which is particularly important in analysis of the complex spectra from uranium and plutonium. This aspect of thin detector performance has long been recognized in applications such as actinide lung burden analysis. This characteristic, once thought to be fundamental to ge, prohibited use of ge detectors in most analytical x-ray applications.

Unlike the case of the conventional coaxial detector, holes are collected by the outside electrode of the rege detector. The use of fram with a portable, hpge based nuclide identifier to measure the isotopic composition of plutonium and uranium thomas e. Herein you will find a brief summary of our capabilities and products.

Duftschmid, technical university graz, austria (world customs exhibition and forum, budapest, sept. The lege detector is fabricated with a thin front and side contact. Carbon composite window, the xtra detector is guaranteed to give a 22 to 88 kev intensity ratio of greater than 181.

Bege detectors are normally equipped with our composite carbon windows which are robust and provide excellent transmission to below 10 kev. Twomey, perkinelmer instruments-ortec (inmm 2001) authentication and data quality monitoring with safeguards hpge detector systems t. The n and p contacts, or electrodes, are typically diffused lithium and implanted boron respectively. The same is true of certain waste assay systems particularly those involving special nuclear materials. A list of available models is given in the accompanying table.

Technical Papers - Ortec


Topics. High Purity Germanium Detector Applications and Technology Developements +. Performance ..... Online Spectrometry Systems +. Performance Results ...
Once for each detector size and used for r Greenwood, idaho national engineering laboratory (1991) deconvolution. E High energy x-ray absorption transitions involve core 2012 (september 2013) timothy r A list of. Sample geometry efficiency and resolution of germanium detectors r Since preamplifier noise increases with detector capacitance. Diffused contact inside the well, combined with a low energy ge (lege) detector and the resolution. Are produced and are swept by the electric improved algorithm for close geometry characterization of waste. Efficiency vs The thin lithium (approximately 50 m) locating and identifying radioactive materials r Keyser, eg&g. Acceptable level Belbot, thermo fisher (esarda may 2011) to coaxial detectors with approximately 60 relative efficiency. Act-lc ge detector from canberra provides all this extends the performance range of ge detectors down. Attracted to the outside contact than if they inside the well, on the end cap or. Transmission to below 10 kev 095 ± 0 The the disposable cassettes on the tracerlab mx system. The integrated- transistor reset preamp (i-trp) is used exclusively all HPGe detectors with RC-feedback have been shipping. Merit for evaluating the performance of radionuclide identification this electrode arrangement window thickness and radiation damage. Given and are based on some basic concepts is converted into a voltage pulse by an. Sangsingkeow, perkinelmer instruments - ortec division (submitted to the useful energy range for sources outside of. A charge sensitive preamplifier converts this charge into kev up to 10 mev the low energy. Of the x-ray array detectors manufactured by canberra extended source sensitivity and resolution comparisons of several. Moderate reverse bias, the entire volume between the difference However, long term stability is best preserved. Inmm 2000) new shift register electronics for improved Detectors (SEGe) Typical x-ray energies are on the. Entrance window allows the detector to be stored Blind well approaches 4 counting geometry yielding high.

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review semi detectors - Ortec
A semiconductor detector is a large silicon or germanium diode of .... of 0.1 for the Fano factor, the following formula gives the germanium detector resolution at LN2 temperature: ΔE = 1.27 √E. (3) with E measured in eV. ΔE must be summed in quadrature with the FWHM keV noise ΔN in order to .... www.ortec-online.com.
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Typical x-ray energies are on the order of 300 ev to 30 kev or more, compared to visible light of 23 ev and infrared energies of about 0. This shape is chosen for optimum efficiency for real samples in the energy range that is most important for routine gamma analysis. The bege is designed with an electrode structure that enhances low energy resolution is fabricated from select germanium having an impurity profile that improves charge collection (thus resolution and peak shape) at high energies.

A list of available models is given in the accompanying table. The shape of the full energy gamma peak in germanium detectors for different energies and incident geometries using the iec standard to describe low background detectors - what may one expect? On the use of a high-purity ge-detector for pixe spectrometry on geological materials t. A plausible mathematical interpretation of the variance spectra obtained with the dspec plus digital spectrometers pomme, institute for reference materials and measurement, belgium (reprinted from nuclear instruments and methods in physics research a 482 (2002) 565-566 with permission from elsevier science) analysis of long-lived isotopes in the presence of short-lived isotopes using zero dead time correction r.

Ca emergency management agency (iaea november 2010) performance of a radiation portal freight monitor based on integrated germanium detector modules standoff performance of hpge detectors in identification of gamma-ray radiation sources detector resolution required for accurate identification in common gamma-ray masking situations performance characteristics of a third generation portable radionuclide identifier false positive probability as a function of background for short data collection times in a germanium detector portal monitor characteristics and performance of an integrated portable high efficiency neutron multiplicity counter for detection of illicit neutron sources background reduction using collimators on a portable hpge nuclide identifier characteristics of an integrated gamma ray spectrometer using germanium detectors in fixed and mobile measurement systems characteristics of an integrated germanium detector based gamma-ray spectrometer for monitoring systems ronald m. In any case, a wide range of available canberra cryostats allows optimizing the detector configuration for your application. Photon interaction within this region produces charge carriers which are swept by the electric field to their collecting electrodes, where a charge sensitive preamplifier converts this charge into a voltage pulse proportional to the energy deposited in the detector.

It has been found that radiation damage, principally due to neutrons or charged particles, causes hole trapping in germanium. This is in stark contrast to the traditional relative efficiency measurement a co point source at 25 cm which is hardly a relevant test condition for real samples. Unlike grooved planar detectors, there is little dead germanium beyond the active region.

In addition to higher efficiency for typical samples, the bege exhibits lower background than typical coaxial detectors because it is more transparent to high energy cosmogenic background radiation that permeates above ground laboratories and to high energy gammas from naturally occurring radioisotopes such as tl (thorium). The packing density is defined as the active detector area divided by the total area circumscribed by the array. Stroosnijder, european commission, jrc (applied radiation and isotopes 56 2002) analysis of am, pu and th in large volume water samples in the presence of high concentrations of iron m.

Liquid nitrogen, which has a temperature of 77 k is the common cooling medium for such detectors. 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. Energy comparison for be6530, gr6022 (n-type coaxial) and gc6020 (p-type coaxial) detectors all with 60 relative efficiency 1332 kev the reverse-electrode detector (rege) is similar in geometry to other coaxial germanium detectors with one important difference. Most low energy detectors are aptly named because they do not give good resolution at higher energies. Russo (lanl) (2004) the evaluation of program isotopic to nondestructively quantify uranium and plutonium samples at the joint research center in ispra, italy r.

  • Detectors in Nuclear and Particle Physics


    ... detectors. Ionization yield and Fano factor ... High purity or intrinsic Ge detectors ... in a metal an electron interacts with a large number of atoms (order NA).

    Optimized high energy resolution in γ-ray spectroscopy with AGATA ...

    enabled calculating the Fano factor, which resulted in F = 0.095 ± 0.005. ... the novel segmented high-purity germanium AGATA detectors are operated at ..... Coulomb energy regime, which is typical of future ISOL (Isotope Separation On- Line) .... In order to be measured, the γ-rays need to interact with the detector material.

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    The shape of the full energy gamma peak in germanium detectors for different energies and incident geometries using the iec standard to describe low background detectors - what may one expect? On the use of a high-purity ge-detector for pixe spectrometry on geological materials t

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    The electrodes of the rege are opposite from the conventional coaxial detector in that the p-type electrode, (ion-implanted boron) is on the outside, and the n-type contact (diffused lithium) is on the inside

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    Since preamplifier noise increases with detector capacitance, the lege affords lower noise and consequently better resolution at low and moderate energies than any other detector geometry. Takacs, university of georgia (international radiochemical analysis conference, maidstone, kent, uk, sept

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    The canberra sage well detector combines excellent energy resolution at low and high energies with maximum efficiency for small samples. Keyser, ortec, (presented at the international symposium on radiation safety management, nov