mean life


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mean life

See half-life.

mean life

[′mēn ′līf]
(physics)
The average time during which a system, such as an atom, nucleus, or elementary particle, exists in a specified form; for a radionuclide or an excited state of an atom or nucleus, it is the reciprocal of the decay constant. Also known as average life; lifetime.
References in periodicals archive ?
Vinter's life sentence will mean life following a ruling by judges at the European Court of Human Rights LEGAL BATTLE: Mums Peggy White, on the left, and Val Edon, above, and victims Anne White and Carl Edon, inset, who were killed by Gary Vinter, below Main picture by IAN McINTYRE
LIFE will mean life for evil Philip Fraser, who was sentenced yesterday for bludgeoning and stabbing his ex-girlfriend to death in a jealous rage.
The Life Should Mean Life march will call to keep killers locked up for life.
There should be a clear sentence of a fixed term, but life should mean life.
But it's probably only exceptional cases in which life has to mean life.
Martin Kane, whose daughter Laura, nine, was raped and murdered six years ago, has so far collected 10,000 signatures on a petition to make life sentences mean life.
LIFE will mean life, Home Secretary David Blunkett said today when he introduced new guidelines for sentencing murderers.
In a time of war, when truth and accuracy mean life and death, these phrases of equivalence are simply immoral.
Life should mean life for any murderer - or bring back hanging, then there would be fewer thugs to keep in prison at the expense of the tax-paying public.
If life does mean life, then this twisted and dangerous individual, simply becomes a statistic, and an expensive one at that.
A CAMPAIGN group calling for life sentences to mean life has held an emotional city centre rally.
Tony Dale, Hartlepool station manager, said: "Our message to new drivers, especially young footballers whose income and lifestyle means that they may be driving a high-performance car, is that they will be taking actions and making decisions than can mean life or death on the road for them.