pion
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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.

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negative pi meson pion negative pi meson radiotherapy Propionibacterium propionic fermentation propionicacidemia			00 Hardcover QC793 Jame Cronin and Val Fitch discovered that the long-lived neutral kaon decays both into three and into two pions in 1964, confirming the violation of the postulated CP (charge conjugation-parity) symmetry of the laws of physics, and eventually earning a Nobel Prize in the process. CP violation; from quarks to leptons; proceedings by SciTech Book News When pions crash into protons at an energy of about 18 gigaelectron-volts (GeV), the gluons holding the quarks together behave as if they were elastic strings stretched between the quarks. Exotic needle found in particle haystack by Peterson, Ivars / Science News in this picture, pions carry the force holding these particles together. The stuff of protons: gluing quarks to make protons, neutrons, and ... by Peterson, Ivars / Science News			pinocyte pinocytosis pinosome pinprick pinprick test Pins' syndrome Pinsaun pinscher pint pinta pinta fever pinto pinup procedure Pinus Pinwheel Pattern pinworm pinworm infection pinworm tape test Pinzgau Pinzgauer PIO 2 pio- pioglitazone pioglitazone hydrochloride pion Pions PIOPED Piophila casei PIP pipe cleaner pipe fast pipe tobacco pipecolic acid pipecurium pipecuronium pipecuronium bromide Pipeline Pipelle pipemidic acid Piper forceps Piper longum Piper Methysticum Piper Nigrum piperacetazine piperacillin piperacillin sodium piperacillin sodium and tazobactam sodium piperacillin-tazobactam piperazine pipercuronium piperidine			pioneering pioneering pioneering Pioneering Advanced Mobile Privacy and Security Pioneering Caller Authentication for Secure Service Operation Pioneering High Energy Nuclear Interaction eXperiment Pioneering Substance Misuse Recovery pioneers pioneers pioneers Pioneers Advancing Reproductive Liberties and Education Pioneers for Christ Pioneers for Jesus Pioneers Memorial Healthcare District Pioneers' Day Pioner Pioner Pionerskaia Pionerskaia Pravda Pionerskii Pionersky pionic pionic pionic Pionier Pionier André Citroën Automobielclub Nederland Pioniere Pionites Pionium Pionniers de la Route Organisation Pions Piontkovskii, Andrei Piontkovskii, Andrei Andreevich Piontkovskii, Sergei Piontkovskii, Sergei Andreevich Pionus Parrots Research Foundation Piony PIOO PIOOM PIOOMA PIOP PIOPED PIOPED Piophila casei Piophilidae Piophilidae PIOPS PIOS piosities piosity Piot Piot PIOTA piotine Piotr Jaroszewicz Piotr Michalowski Piotr Sciegienny Piotrkow

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pion (redirected from Pions)

pion
(redirected from Pions)