| 单词 | geiger counter |
| 释义 | Geiger counternounan instrument for detecting ionizing radiations, consisting of a gas-filled tube in which electric-current pulses are produced when the gas is ionized by radiation, and of a device to register these pulses: used chiefly to measure radioactivity. Also called Geiger-Müller counter. Origin of Geiger counterFirst recorded in 1920–25; named after H. Geiger Words nearby Geiger countergehlenite, Gehrig, Gehrig, Lou, Gehry, Geiger, Geiger counter, Geiger-Müller threshold, Geiger-Müller tube, geiger tree, Geiger tube, Geikie Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for Geiger counterGeiger counter Geiger-Mller counter/ (ˈɡaɪɡəˈmʊlə) / nounan instrument for detecting and measuring the intensity of ionizing radiation. It consists of a gas-filled tube containing a fine wire anode along the axis of a cylindrical cathode with a potential difference of several hundred volts. Any particle or photon which ionizes any number of gas molecules in the tube causes a discharge which is registered by electronic equipment. The magnitude of the discharge does not depend upon the nature or the energy of the ionizing particleCompare proportional counter Word Origin for Geiger counterC20: named after Hans Geiger and W. Müller, 20th-century German physicist Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for Geiger counterGeiger counter [ gī′gər ] n.An instrument that measures the intensity of radiation by detecting radioactive particles as they cross a metal or glass tube filled with gas, causing ionization of the gas molecules and producing an electrical discharge.Geiger-Müller counter The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for Geiger counterGeiger counter An electronic instrument that detects and measures nuclear radiation, such as x-rays or gamma rays. The Geiger counter consists of a gas-filled tube with a charged electrode connected to a counter. As radiation passes through the gas it ionizes atoms along its path. The ions are attracted to the charged electrode, creating pulses of electric current that are registered by the counter. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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