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abstraction > mathematical concept > number > quantity > time > half-life
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half-life
(τ1/2)
subjectfact 
half-lifehas symbol τ1/2has source: Coughlan, G.D., Dodd, J.E. 1999 The Ideas of Particle Physics, Cambridge University Press, 2001-09-27 09:33:26.0
see also mean life2001-09-27 09:33:26.0
has definition Time it takes for the number of particles to halve. For a radioactive substance, the length of time required for half the atoms to disintegrate.has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:33:26.0
is a kind of time2001-09-27 09:33:26.0
timehas unit time unit2001-09-27 09:33:25.0
numberhas value2001-09-27 09:32:57.0