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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 ...
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.
Overhead view of the Miniball set up. The Miniball detector array consists of 24 high-purity germanium crystals which have a tapered front end. [8] In contrast to other detectors developed at a similar time (e.g. EUROBALL) they have a six-fold segmentation, with each of the segments coupled to a separate preamplifier. [13]
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 base IDS setup consists of four high-purity germanium (HPGe) clover detectors, which can be retracted and inserted manually and one HPGe Miniball cluster detector. These detectors form a gamma detector array with good efficiency and energy resolution. [12] [2] Each detector has a liquid nitrogen cooling canister, and consists of four HPGe ...
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.
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.