The Low Energy Germanium Detector (LEGe) is in all aspects optimized for performance at low and moderate energies and has specific advantages over conventional planar or coaxial detectors. ... Intrinsic Ge, or Hyperpure Ge. The conventional coaxial germanium detector is often referred to as Pure Ge, HPGe, Intrinsic Ge, or Hyperpure Ge. BEGe ...Web

• Detectors can be designed to have one or two scintillation materials – "Single phosphor" detectors are used for either alpha or beta – "Dual phosphor" detectors are used to detect both • For ambient gamma dose measurement no thin window is required • Detectors based on semiconductors, notably hyperpure germanium, haveWeb

Germanium detectors have reached an unprecedented level of sophistication and they are still the best solution for high resolution gamma spectroscopy. On the other side, they are expensive, ... [11, 12]. In the seventies High purity Germanium detectors (HPGe or hyperpure Ge detectors)[13,14 ...Web

Rare event search experiments using germanium detectors are operated in underground laboratories to minimize the background induced by cosmic rays. However, …Web

The U.S. Department of Energy's Office of Scientific and Technical InformationWeb

Collimator and shield configurations for two high-purity germanium detectors were designed for use during a loss of coolant accident at a boiling water reactor. The detectors will return information concerning stack releases to operators within a 15 minute time frame. Operating parameters for the stack monitors are defined by the United States ...Web

High purity germanium (HPGe), also called as hyperpure germanium, is a favored material for fabrication of large-volume and thick radiation detector for …Web

Germanium detectors--an overview; 6.2. Hyperpure germanium detectors; 6.3. Key parameters for germanium detectors; 6.4. Principal classes of germanium detector; 6.5. Improving germanium detector performance; 6.6. Room temperature semiconductor detectors for gamma rays; 7. Applications of gamma-ray detection for society, medicine …Web

Total attenuation cross sections for several sugars are measured for 661.6-, 1173-, and 1332.5-keV photons in a narrow beam geometry setup, by using a hyperpure germanium detector.Web

NA is number of acceptor impurities 2 AeNV dE x x d docsity | HPGe Detector Planer Configuration cont'd hyperpure germanium ion implanted |_~ front contact } 150-500 1 beryiiun window lithium ttused fear comact …Web

high purity germanium traps and defects gamma-ray detection dark matter nuclear spectroscopy nuclear material monitoring …Web

A technique for precise determination of β- endpoints with an intrinsic germanium detector has been developed and checked with 27 Si and 58 Cu sources; Q EC values of 5272 ± 26, 8063 ± 42 keV have been obtained for mass-separated samples of 77 Rb, 75 Rb and 77 Kt, respectively. Mass surface systematics in this region have been …Web

The Mirion XtRa unit is a coaxial germanium detector having a unique thin-window contact on the front surface which extends the useful energy range down to 3 keV. Conventional coaxial detectors have a lithium-diffused contact typically between 0.5 and 1.5 mm thick. This dead layer stops most photons below 40 keV or so rendering the detector ...Web

Abstract: There is a strong need for spectroscopy detector for high-energy X-ray application where silicon, the material of choice for direct detection becomes X-ray …Web

The global hyperpure germanium detectors market size was valued at USD 368.9 million in 2022 and is projected to reach USD 683.2 million by 2030, at a CAGR of 9.7% during the forecast period. The U.S. Market is Estimated at $ Million in 2022, While China is Forecast to Reach $ Million.Web

Purpose: To demonstrate the measurement of gamma-ray energies with high resolution provided by a High-purity Germanium (HPGe) detector. Semiconductor detectors made of germanium or silicon compensated …Web

Germanium Detectors. A semiconductor detector is a radiation detector based on a semiconductor, such as silicon or germanium, to measure the effect of incident charged particles or photons. Semiconductor detectors are widely used in radiation protection, an assay of radioactive materials, and physics research. Advantages of Germanium …Web

The standard procedure for whole counting done at ORNL employs a 13.34 cm-dia. phoswich, a hyperpure germanium (HPGe) array consisting of six detectors totaling 80 cm/sup 2/, and a 23 cm by 23 cm NaI detector positioned under the subject's back.Web

Most NAA labs operate one or more hyperpure or intrinsic germanium (HPGe) detectors which operate at liquid nitrogen temperatures (77 degrees K) by mounting the germanium crystal in a vacuum cryostat, thermally connected to a copper rod or "cold finger". Although HPGe detectors come in many different designs and sizes, the most common type of ...Web

Ultra-low bkg HpGe detectors for radiopurity measurements next to the two halls. In August 1988, as a result of a collaboration with the University of South Carolina (USC) and the Pacific Northwest National Laboratory (PNNL), the first ultralow background detector came to Can-franc: a germanium hyperpure detector. With this detector preliminaryWeb

Germanium detectors are the best solution to study ... (Smith et al., 2002) was based on the largest, readily available, hyperpure (N-type) coaxial Ge material ( 7.1 cm diam × 8.5 cm long). Nine were enclosed in a single cryostat and cooled below 75 K for optimized operation. For each detector, the inner electrode was segmented into three ...Web

resolution of the detector. Liquid nitrogen, which has a temperature of 77 °K is the common cooling medium for such detectors. The detector is mounted in a vacuum chamber which is attached to or inserted into an LN 2 Dewar. The sensitive detector surfaces are thus protected from moisture and condensible contaminants. Typical …Web

The availability of germanium with less than 1010 acceptors/cm3 has enabled us to fabricate and study the performance of germanium detectors of substantially larger …Web

Summary. — The segmentation process of high purity germanium detectors (HPGe) is here described. A photolithography technique is used to obtain a seg-mented gamma …Web

The U.S. Department of Energy's Office of Scientific and Technical InformationWeb

The performance of hyperpure-germanium detectors for the determination of beta end-point energies has already been investigated by Moore, Hayakawa and Rehfeld4), in a spectrometer comprised of a detector inside of a superconducting solenoid. The purpose of the present study was to evaluate such detectors for use without a …Web

germanium [Ge(Li)] as the detection medium. The lithium served to inhibit trapping of charge at impurity sites in the crystal lattice during the charge collection process. In recent years, manufacturers have produced hyperpure germanium (HPGe) crystals, essentially eliminating the need for the lithium doping and simplifying operation of the ...Web