单词 | K factor |
释义 | K factor [`kā ´fak·tǝr] GRAPHIC ARTS See <<base-altitude ratio>> NUCLEONICS A measure of the energy of the gamma rays produced by a particular type of emitter; it is the gamma-ray dose rate in roentgens per hour at a distance of 1 centimeter from a source having a radioactive disintegration rate of 1 millicurie (3.7 × 107 disintegrations per second). ORDNANCE In artillery ground fire, a factor to be applied to the actual range to a point in order to determine the range which must be fired to hit that point; it is the result of registration and the solution of a meteorological message, and is expressed as plus or minus so many yards per thousand units of actual range. |
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