Positrons had been found in 1932 by Carl David Anderson in his cloud chamber research of the composition of cosmic rays.
The invention of the positron offered a proof for a theoretical facet of electrons predicted by British physicist Paul Adrien Maurice Dirac.
The Dirac wave equation revealed an abundance of detrimental vitality states that had not been noticed earlier than. In 1931, Dirac instructed that these states may be associated to a new sort of particle, the antielectron.
Secure in vacuum, positrons quickly react with electrons of abnormal matter by annihilation to supply gamma radiation.
Positrons are emitted within the optimistic beta decay of proton-rich (neutron-deficient) radioactive nuclei and are shaped in pair manufacturing, wherein the vitality of a gamma ray in a nuclear discipline is transformed into an electron-positron pair.
They’re additionally produced within the decay of some short-lived particles, reminiscent of optimistic muons. Positrons emitted from man-made radioactive sources are utilized in medical analysis by a approach referred to as Positron Emission Tomography (PET).
#positron
Dikkat: Sitemiz herkese açık bir platform olduğundan, çox fazla kişi paylaşım yapmaktadır. Sitenizden izinsiz paylaşım yapılması durumunda iletişim bölümünden bildirmeniz yeterlidir.
[source_url]
