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The Germanium Detector Array (or GERDA) experiment was 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 predicted less than one event each year per kilogram of material, appearing as a narrow spike around the 0νββ Q-value (Qββ = 2039 keV) in the observed energy spectrum. This meant background shielding was required to detect any rare decays. The LNGS facility has 1400 meters of rock overburden, equivalent to 3000 meters of water shielding, reducing cosmic radiation background. The GERDA experiment was operated from 2011 onwards at LNGS.[1]
After completing the GERDA experiment, the GERDA collaboration merged with MAJORANA-collaboration to build a new experiment LEGEND.
GERDA reported its final results in December 2020 in the Physical Review Letters. The experiment reached all the goals that it set to itself, but no detection of any 0νββ events was made.[1]
The experience from GERDA led to the expectation that further background reduction was in reach so that a background-free experiment with an even larger source strength, respectively exposure, became possible. The LEGEND collaboration, continuing GERDA's work, was aiming at increasing the sensitivity to the half-life of 0νββ decay up to . In a first phase, it planned to deploy a mass of 200 kg of enriched germanium detectors in the slightly modified infrastructure of GERDA with the start of data taking planned for 2021.[1]
^ abc"Another milestone in the search for neutrinoless double-beta decay – Final results of GERDA » APPEC".
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The GermaniumDetectorArray (or GERDA) experiment was searching for neutrinoless double beta decay (0νββ) in Ge-76 at the underground Laboratori Nazionali...
decay has not yet been found. The GermaniumDetectorArray (GERDA) collaboration's result of phase I of the detector was a limit of T β β 0 ν > 2.1 ⋅ 10...
Cologne, PSI and RIKEN (HiCARI). Miniball is a high-resolution germaniumdetectorarray, specifically designed to work with low-intensity radioactive ion...
medium. Other detectors have consisted of large volumes of chlorine or gallium which are periodically checked for excesses of argon or germanium, respectively...
detected gamma ray. Common detector materials include sodium iodide (NaI) scintillation counters and high-purity germaniumdetectors. To accurately determine...
(around a thousand volts per centimeter). Germanium and silicon are common materials. Some of these detectors sense position as well as energy. They have...
Germanium is a chemical element; it has symbol Ge and atomic number 32. It is lustrous, hard-brittle, grayish-white and similar in appearance to silicon...
their greater bandgap, silicon-based photodiodes generate less noise than germanium-based photodiodes. Binary materials, such as MoS2, and graphene emerged...
radiation detectors can operate in direct-conversion (or photoconductive) mode at room temperature, unlike some other materials (particularly germanium) which...
much less cooling. Honeywell in the United States also developed arrays of detectors that could cool at a lower temperature,[further explanation needed]...
kilometre. Similar to its predecessor, the Antarctic Muon And Neutrino DetectorArray (AMANDA), IceCube consists of spherical optical sensors called Digital...
It is the most common oxide-based scintillator. Bismuth germanium oxide is used in detectors in particle physics, aerospace physics, nuclear medicine...
Luskin et al. (2023). “Large active-area superconducting microwire detectorarray with single-photon sensitivity in the near-infrared”, Appl. Phys. Lett...
devices. Most transistors are made from very pure silicon, and some from germanium, but certain other semiconductor materials are sometimes used. A transistor...
level. Here is a non-exhaustive list of neutrino experiments, neutrino detectors, and neutrino telescopes. ^[a] Accelerator neutrino (AC), Active galactic...
Weakly Interacting Massive Particles (or WIMPs). Using an array of semiconductor detectors at millikelvin temperatures, CDMS has at times set the most...
a gamma-ray spectroscopy setup consisting of a high-resolution germaniumdetectorarray. The experiment is used to analyse the decays of short-lived nuclei...
used for photovoltaic arrays for satellite applications. Later, dual- and triple-junction solar cells based on GaAs with germanium and indium gallium phosphide...
short-wavelength modules. The 70 μm detector used gallium-doped germanium technology, and the 160 μm detector also used gallium-doped germanium, but with mechanical...
Underground Rare Event Calorimeter Array (EURECA) is a planned dark matter search experiment using cryogenic detectors and an absorber mass of up to 1 tonne...
high-purity germanium (HPGe) clover detectors, which can be retracted and inserted manually and one HPGe Miniball cluster detector. These detectors form a...
is a problem that may appear when high-resolution detectors (usually germanium semiconductor detectors) are used in beta decay studies. It can affect the...
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