Bragg-Gray cavity

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• Bragg-Gray Cavity Theory — According to the Bragg Gray cavity theory, the ionization produced within a gas filled cavity inside a medium is related to the energy absorbed in that surrounding medium. If the cavity is small enough that it does not change the number or… …   Wikipedia

• gray — The SI unit of absorbed dose of ionizing radiation, equivalent to 1 J/kg of tissue; 1 Gy = 100 rad. SYN: griseus. [Louis H. G., British radiologist, 1905–1965] * * * gray or chiefly Brit grey grā n any of a series of neutral colors ranging… …   Medical dictionary

• Louis Harold Gray — (10 November 1905 9 July 1965) was a British physicist who worked mainly on the effects of radiation on biological systems, inventing the field of radiobiology as he went. A summary of his work is given below. Amongst many other achievements, he… …   Wikipedia

• Ionization potential — The ionization potential, ionization energy or EI of an atom or molecule is the energy required to remove an electron from the isolated atom or ion. More generally, the nth ionization energy is the energy required to strip it of the n th electron …   Wikipedia

• spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …   Universalium

• radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …   Universalium

• John Randall (physicist) — Infobox Scientist name = Sir John Randall box width = image width =150px caption = Sir John Randall birth date = March 23, 1905 birth place = death date = June 16, 1984 death place = residence = citizenship = nationality = British ethnicity =… …   Wikipedia

• Radiosurgery — This article is about the medical procedure. For the album by American rock band New Found Glory, see Radiosurgery (album). Radiosurgery Intervention CLINAC: a model of steerable linear accelerator commonly used in radiosurgery …   Wikipedia

• metallurgy — metallurgic, metallurgical, adj. metallurgically, adv. metallurgist /met l err jist/ or, esp. Brit., /meuh tal euhr jist/, n. /met l err jee/ or, esp. Brit., /meuh tal euhr jee/, n. 1. the technique or science of working or heating metals so as… …   Universalium

• List of Puerto Ricans — This list of Puerto Ricans includes people who were born in Puerto Rico, people who are of Puerto Rican ancestry, and many long term residents and/or immigrants who have made Puerto Rico their home, who are significantly notable for their life… …   Wikipedia

• physical science, principles of — Introduction       the procedures and concepts employed by those who study the inorganic world.        physical science, like all the natural sciences, is concerned with describing and relating to one another those experiences of the surrounding… …   Universalium