What is meant by annihilation radiation?
: radiation produced by the mutually annihilating coalescence of a particle and its antiparticle from which two radiation quanta travel in opposite directions with a wavelength corresponding to that of very short gamma rays, being approximately 0.024 angstrom.
What does annihilation mean in science?
annihilation, in physics, reaction in which a particle and its antiparticle collide and disappear, releasing energy. The most common annihilation on Earth occurs between an electron and its antiparticle, a positron.
What is an example of annihilation?
The definition of an annihilation is the entire and complete destruction of a place, thing or group. An example of an annihilation is the bombing of an entire town and the resulting murder of all the residents.
What is the annihilation peak how it is produced?
It is synthetically produced by neutron activation of cobalt-59 in nuclear reactors. Cobalt-60 is a common calibration source found in many laboratories. The gamma spectrum has two significant peaks, one at 1173.2 keV and another at 1332.5 keV.
What is annihilation in gamma rays?
From Wikipedia, the free encyclopedia. Annihilation radiation is a term used in Gamma spectroscopy for the photon radiation produced when a particle and its antiparticle collide and annihilate. Most commonly, this refers to 511-keV photons produced by an electron interacting with a positron.
What does the word annihilate?
transitive verb. 1a : to cause to cease to exist : to do away with entirely so that nothing remains. b : to destroy a considerable part of Bombs annihilated the city.
What is annihilation in history?
1 : the state or fact of being completely destroyed or obliterated : the act of annihilating something or the state of being annihilated The late 1940s and ’50s were so pervaded by a general fear of nuclear annihilation that the era was known as the Age of Anxiety.—
What is meant by the word annihilate?
What is mean annihilate?
Why do particles annihilate?
In particle physics, annihilation is the process that occurs when a subatomic particle collides with its respective antiparticle to produce other particles, such as an electron colliding with a positron to produce two photons.
Why are two photons produced in annihilation?
Annihilation occurs when a particle and a corresponding antiparticle meet and their mass is converted into radiation energy. Two photons are produced in the process (as a single photon only would take away momentum which isn’t allowed, as no outside forces act).
What is an example sentence for annihilation?
Annihilation Sentence Examples. The battle got so bad that the only way to prevent the annihilation of every being in the universe was to divide the physical and divine worlds. The practical annihilation of the old Right in the elections of 1876 opened a new parliamentary era.
What is the meaning of annihilate?
Annihilate(verb) to destroy or eradicate, as a property or attribute of a thing; to make of no effect; to destroy the force, etc., of; as, to annihilate an argument, law, rights, goodness. Annihilate(adj) annihilated.
What is the noun for annihilation?
annihilation. noun. /əˌnaɪəˈleɪʃn/. /əˌnaɪəˈleɪʃn/. [uncountable] jump to other results. the act of somebody/something being completely destroyed. the annihilation of the whole human race. the complete defeat of somebody/something.