pion


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Related to pion: kaon

pion

[pī′on]
Etymology: Gk, pi, 16th letter of Greek alphabet, meson, nuclear particle
any of a family of subatomic particles that can be created in nuclear reactions. Pions are unstable but can exist long enough to be formed into beams and used in certain types of medical therapy, such as the treatment of brain tumors. Pions of suitable energy can penetrate the skull and deliver most of their energy to a tumor while sparing overlying normal tissue. See also negative pi meson pion.
References in periodicals archive ?
The most typical clinical presentation of PION consists of acute visual loss, along with afferent pupillary defect, and the remarkable absence of ocular pain or headache.
There's no way a contractor can not comply with OSHA," said Pion.
Achieving the mind-boggling velocities measured by OPERA would have required pions with energies 20 times greater than their offspring, Cowsik's team calculates.
What's more," he says, "these difficulties would only increase as the pion energy increases.
CB Richard Ellis (CBRE) has named Executive Vice President Jeff Pion, based in the firm's West Los Angeles, California office, to the Company's Board of Directors following the firm's acquisition of Insignia/ESG, and concurrently appointed him as Chairperson to CBRE's Brokerage Operations Advisory Committee.
5 times as massive as a pion but still only half as massive as a proton or neutron and was called a K-meson, which was sometimes abbreviated to kaon.
Today Atomic Labs is Happy to Announce That the Power of Pion is Now Available in a Convenient to Go Box with the Introduction of Our Pion Reactor Core Appliance
Il arrive parfois d'avoir un carton [beaucoup moins que]grille[beaucoup plus grand que] qui se fait passer pour gagnant alors qu'il lui manque un pion.
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Born in Woonsocket, RI daughter of the late Edward and Carrie (Hart) Pion.
1) Of particular interest is the isovector pion exchange amplitude [f.
He has succeeded, thanks to the inclusion of works from Nusrat Fateh Ali Khan (``Sea of Vapours,'' ``Tracery''), John Clifford White (``Escape,'' ``The Freak Out,'' ``Incantations''), The Grid (the gorgeous ``Angel Tech''), Shu-de (``Sygyt Khoomei Kargyraa''), Dave Clayton and Renaud Pion (``Astal''), and Peter Gabriel (``We Do What We're Told'').