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Cluster decay, also named heavy particle radioactivity, heavy ion radioactivity or heavy cluster decay, [1] is a rare type of nuclear decay in which an atomic nucleus emits a small "cluster" of neutrons and protons, more than in an alpha particle, but less than a typical binary fission fragment.
In particle physics and nuclear physics, the branching fraction (or branching ratio) for a decay is the fraction of particles that decay by an individual decay mode or with respect to the total number of particles which decay.
Radiation hardening is the process of making electronic components and circuits resistant to damage or malfunction caused by high levels of ionizing radiation (particle radiation and high-energy electromagnetic radiation), [1] especially for environments in outer space (especially beyond low Earth orbit), around nuclear reactors and particle accelerators, or during nuclear accidents or nuclear ...
A uniform polymer (often referred to as a monodisperse polymer) is composed of molecules of the same mass. [5] Nearly all natural polymers are uniform. [6] Synthetic near-uniform polymer chains can be made by processes such as anionic polymerization, a method using an anionic catalyst to produce chains that are similar in length.
Mesh is a measurement of particle size often used in determining the particle-size distribution of a granular material. For example, a sample from a truckload of peanuts may be placed atop a mesh with 5 mm openings. When the mesh is shaken, small broken pieces and dust pass through the mesh while whole peanuts are retained on the mesh.
The weekly average of each days calculated 7-day rolling average for the share of all detected VOC-N501Y cases (which is a good proxy for Alpha in Liechtenstein), was found to be 10.9% in week 5, followed by a dominant 52.2% in week 9 (where 8 out of 15 tests were found to be Alpha); and grew further to 73.4% in week 10 (where 6 out of 9 tests ...
First particle collisions in all four detectors at 450 GeV. 30 Nov 2009 LHC becomes the world's highest-energy particle accelerator achieving 1.18 TeV per beam, beating the Tevatron's previous record of 0.98 TeV per beam held for eight years. [116] 15 Dec 2009 First scientific results, covering 284 collisions in the ALICE detector. [117] 30 Mar ...
The Eta variant or lineage B.1.525, also called VUI-21FEB-03 [30] (previously VUI-202102/03) by Public Health England (PHE) and formerly known as UK1188, [30] 21D [75] or 20A/S:484K, [97] does not carry the same N501Y mutation found in Alpha, Beta and Gamma, but carries the same E484K-mutation as found in the Gamma, Zeta, and Beta variants, and ...