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The AGATA detectors are based on encapsulated and electrically segmented n-type high-purity Ge crystals. They are 36-fold segmented with six-fold azimuthal and six-fold longitudinal segmentation. Each detector is 9 cm long and is circular at the rear side with a diameter of 8 cm, and hexagonal at the front face.
High-purity germanium detector (disconnected from liquid nitrogen dewar) Germanium detectors are mostly used for gamma spectroscopy in nuclear physics, as well as x-ray spectroscopy. While silicon detectors cannot be thicker than a few millimeters, germanium can have a sensitive layer (depletion region) thickness of centimeters, and therefore ...
Common detector materials include sodium iodide (NaI) scintillation counters, high-purity germanium detectors such as Bismuth germanate, and more recently, GAGG:Ce. To accurately determine the energy of the gamma ray, it is advantageous if the photoelectric effect occurs, as it absorbs all of the energy of the incident ray.
A clover detector is a gamma-ray detector that consists of 4 coaxial N-type high purity germanium (Ge) crystals each machined to shape and mounted in a common cryostat to form a structure resembling a four-leaf clover. [1] The clover is the first composite Ge detector.
Crystals of high purity germanium are used in detectors for gamma spectroscopy and the search for dark matter. [89] Germanium crystals are also used in X-ray spectrometers for the determination of phosphorus, chlorine and sulfur. [90] Germanium is emerging as an important material for spintronics and spin-based quantum computing applications.
The experiment used high purity enriched Ge crystal diodes as a beta decay source and particle detector. The detectors from the HdM (Heidelberg-Moscow [2]) and IGEX [2] experiments were reprocessed and used in phase 1. The detector array was suspended in a liquid argon cryostat lined with copper and surrounded by an ultra-pure water tank.
The instrument detectors were nine high-purity germanium crystals. Each was cooled to cryogenic temperatures by a mechanical cryocooler. Germanium provided not only detections by the photoelectric effect, but inherent spectroscopy through the charge deposition of the incoming ray. The crystals were housed in a cryostat, and mounted with low ...
There are two types of germanium detector, the lithium-drifted germanium or Ge(Li) (pronounced ‘jelly’), and the high-purity germanium or HPGe. The semiconducting element silicon may also be used but germanium is preferred, as its higher atomic number makes it more efficient at stopping and detecting high energy gamma rays.