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average life

noun, Physics.

mean life

noun, Physics.
the average time that an unstable particle or nucleus survives before it decays.
Also called average life, lifetime. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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mean life

(physics) the average time of existence of an unstable or reactive entity, such as a nucleus, elementary particle, charge carrier, etc; lifetime. It is equal to the half-life divided by 0.693 15 τ
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
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