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    Germanium Detectors - Teledyne Judson

    Germanium Detectors ... An internal gain mechanism makes the J16A the solid state counterpart of the photomultiplier tube. This internal gain is known as the Multiplication Factor (M) and is a function of the reverse bias voltage VR applied to the diode. (See Fig. 26.) ...

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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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    Germanium Detector Array - Wikipedia

    The Germanium Detector Array (or GERDA) experiment is searching for neutrinoless double beta decay (0νββ) in Ge-76 at the underground Laboratori Nazionali del Gran Sasso (LNGS). Neutrinoless beta decay is expected to be a very rare process if it occurs. The collaboration predicts less than one event each year per kilogram of material, appearing as a narrow spike

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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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    Germanium Array Detectors Data Sheet

    Germanium Array Detectors Because of the relative ease of handling a single workpiece, monolithic detectors can be made with ... gate valve and a translation mechanism allowing the detector to be positioned in a vacuum chamber in close proximity to the x

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    Germanium gamma-ray detector operation with a flight-like ...

    Oct 01, 1996  Detector module A large-volume (68 mm diameter x 69 mm long) reverse- electrode, closed-end, coaxial germanium detector was the evaluation device. The detector was mounted in a flight-like module which was previously developed for high-altitude, balloon-borne detector arrays.

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    Spectroscopy using Germanium Semiconductor - HPGe –

    HPGe detector with LN2 cryostat Source: canberra. But if a perfect energy resolution is required, we have to use germanium-based detector, such as the HPGe detector. 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 ...

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    Fabrication Process Development for High- Purity

    Fabrication Process Development for High-Purity Germanium Radiation Detectors with Amorphous Semiconductor Contacts by Quinn Looker Doctor of Philosophy in Nuclear Engineering University of California, Berkeley Professor Kai Vetter, Chair High-purity germanium (HPGe) radiation detectors are well established as a valuable tool in

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    Germanium nanospheres for ultraresolution picotensiometry ...

    Feb 11, 2021  Simultaneously measuring the nanoscale motion and forces that molecular machines generate provides insights into how they work mechanically to fulfill their cellular function. To study these machines, Sudhakar et al. developed germanium semiconductor nanospheres as probes for so-called optical tweezers. With these high–refractive index

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    Axion Detection with Germanium Detectors

    an electron-hole pair in germanium, resulting in hun-dreds of charge carriers for energy depositions as low as 1 KeV. This, coupled with germanium’s small Fano Factor ( 13%) is responsible for its ne energy resolution.[2] The detector used, MJ60, is a point contact detector, which means that it is a right cylinder grown as a single

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    (PDF) Implication of the Temperature-Dependent Charge ...

    PDF The exploration of germanium (Ge) detectors with amorphous Ge (a-Ge) contacts has drawn attention to the searches for rare-event physics such as...

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    OSA Low loss Ge-on-Si waveguides operating in the 8–14 ...

    Germanium-on-silicon waveguides were modeled, fabricated and characterized at wavelengths ranging from 7.5 to 11 µm. Measured waveguide losses are below 5 dB/cm for both TE and TM polarization and reach values of ∼ 1 dB/cm for ≥ 10 µm wavelengths for the TE polarization. This work demonstrates experimentally for the first time that Ge-on-Si is a viable waveguide

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    2280 ACCUSCAN II™ Scanning Germanium Whole Body Counter

    The standard second detector option includes a 25% coaxial germanium detector with a cryostat, a digital signal processor, an all-in-one cable assembly and the second detector holder for the scanning mechanism. Adding a second detector allows for shorter counting times and improved detection limits.

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    Cadmium zinc telluride CZT gamma-ray and x-ray detectors

    Cadmium zinc telluride CZT is a room temperature semiconductor that directly converts X-ray or gamma-ray photons into electrons. Kromek specialises in growing CZT crystals and turning it into radiation detectors that offer excellent energy resolution and high charge collection efficiency.

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    How Do Sodium Iodide (Scintillation) Detectors Work?

    Sep 10, 2015  The vast majority of radiation detectors out there – and virtually every detector used in general situations – fall into one of these two families. So since I wrote about the gas-filled detectors last time, this is a good chance to write about the other major family. Here’s how the scintillation-type detectors work. First, an important point.

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    Portable Electro-Mechanically Cooled High-Resolution ...

    resolution germanium detector for portable/field applications. The system weighs 6.8 kg and requires 40 watts of power to operate once the detector is cooled to its operating temperature. The detector is a 500 mm* by 20-mm thick low-energy configuration that gives a full-width at half maximum (FWHM) energy resolution of 523 eV at 122 keV,

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    PPT – GERDA @ LNGS (GERmanium Detector Array) PowerPoint ...

    Solar Germanium Wafer Market 2020 by Manufacturers, Type and Application, Forecast to 2025 - Download free PDF Sample: https://bit.ly/30QInd8 #SolarGermaniumWafer #MarketAnalysis The global Solar Germanium Wafer market size is expected to gain market growth in the forecast period of 2020 to 2025, with a CAGR of xx%% in the forecast period of 2020 to 2025 and will

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    Characterization of high-purity germanium detectors with ...

    Abstract 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 ... the scenario of the seesaw mechanism

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    Characterization of high-purity germanium detectors with ...

    Abstract 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 ... the scenario of the seesaw mechanism

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    Charge Collection Physics in Germanium Detectors - NASA/ADS

    To study the effects of radiation damage, germanium detectors of different geometry and typeness were irradiated with various fluences of 183-MeV neutrons, up to the fluence expected from cosmic rays during a several year space mission (~10 9 n/cm 2 ). The gamma-ray resolution degradation was measured as a function of operating temperature, temperature history,

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    CALIBRATION OF SINGLE HIGH PURITY GERMANIUM

    The standard ACCUSCAN-II System includes a shield and scanning detector mechanism as shown in Fig. 1. It consists of a 25% coaxial germanium detector and ... High purity germanium detector was ...

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    2280 ACCUSCAN II™ Scanning Germanium Whole Body Counter

    The standard second detector option includes a 25% coaxial germanium detector with a cryostat, a digital signal processor, an all-in-one cable assembly and the second detector holder for the scanning mechanism. Adding a second detector allows for shorter counting times and improved detection limits.

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    germanium detector Special Nuclear Material

    A high-purity germanium (HPGe) detector is the ultimate instrument for energy spectrometry of gamma radiation. For the nuclear hobbyist, an HPGe opens a window into a fascinating realm of home-accessible, low-intensity nuclear reactions that are obscured by background in other detectors lacking the superlative resolution.

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    How Do Sodium Iodide (Scintillation) Detectors Work?

    Sep 10, 2015  The vast majority of radiation detectors out there – and virtually every detector used in general situations – fall into one of these two families. So since I wrote about the gas-filled detectors last time, this is a good chance to write about the other major family. Here’s how the scintillation-type detectors work. First, an important point.

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    Review on resources and recycling of germanium, with ...

    Feb 12, 2021  Germanium is indispensable for various applications, especially in infrared optics, and has been designated as a strategic resource. However, independ

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    Room Temperature vs. LN2 -Cooled Detectors Infrared ...

    in one minute collection time with room temperature detector (with no use of LN 2). The correlation of 90.85 shows a perfect match with Ibuprofen. Germanium Tip-ATR crystal slide of Nicolet iN10 FT-IR microscope; the quick release dovetail mechanism allows for easy crystal cleaning while the

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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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    Optical Detectors - University of Washington

    The time required for the detector to respond to an optical input. The response time is related to the bandwidth of the detector by BW = 0.35/tr where tris the rise time of the device. The rise time is the time it takes for the detector to rise to a value equal to 63.2% of its final steady-state reading. Response time Junction capcacitance 1/RC

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    OSA Low loss Ge-on-Si waveguides operating in the 8–14 ...

    Germanium-on-silicon waveguides were modeled, fabricated and characterized at wavelengths ranging from 7.5 to 11 µm. Measured waveguide losses are below 5 dB/cm for both TE and TM polarization and reach values of ∼ 1 dB/cm for ≥ 10 µm wavelengths for the TE polarization. This work demonstrates experimentally for the first time that Ge-on-Si is a viable waveguide

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    In Situ Gamma Spectroscopy with ISOCS, an In Situ Object ...

    and Germanium Detector in a Big MAC Cryostat. As shown in Figure 1, the cart provides both the normal lower mounting position for the detector/ shield, and an upper position for one meter in situ ground counting. It is very easy to move the detector and shield between the two positions. The pivoting detector-holder mechanism provides the ability to

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    New Generation of Dark Matter Experiments Gear Up to ...

    Located 6,800 feet underground inside a nickel mine in Ontario, the initial experiment will use four towers that each contain six detectors made from crystals of silicon germanium to attempt to ...

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    (PDF) Particle dark matter and solar axion searches with a ...

    Experimental setupThe COSME detector is a p-type coaxial hyperpure natural germanium crystal, of dimensions 22 mm (length) × 52.5 mm (diameter) corresponding to an active volume of 44 cm 3 and a mass of 234 g which has a long-term resolution of 0.43 keV full width at half maximum (FWHM) at 10.37 keV.

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