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 ?
Jean Taylor, founder of Families Fighting for Justice said that a life sentence for murderers "should mean life".
'Life will mean life for PC killers' ' (Daily Post May 15th), Home Secretary Theresa May should be commended (if 'life'' really does mean 'LIFE'') for the proposal and her view ''It''s a crime that attacks fundamental basis of society'.
In the case of murder, life should mean life the person murdered is serving that sentence.
Treatment with 65 [micro]g/mL PC extended the mean life span of wild-type N2 and FEM-1 worms by 12.1 % and 8.4 %, respectively, i.e., to a similar extent as resveratrol.
At his sentencing, the judge in the case ordered that "life must mean life", criticising the greed that lay behind Neilson's attacks, the vulnerability of the victims and the premeditation.
Life should either mean life or a sentence of an average quarter of a life, which would be a minimum of 25 years.
Surely life should mean life - it is no wonder killings and muggings continue when the criminal knows they are going to get such a short sentence.
Melanie Pley, 23, hairdresser, Jarrow: There should be tougher sentences, A life ban should mean life.
But David Hines, founder of the North of England Victims' Association, told a conference yesterday that many families wanted life to mean life.
So when a life sentence is given it should mean life, or when they do get released after a visit to prison, let them live next door to the do-gooders.
A life sentence should mean life. As it is,parole will be granted in due course.
Sarah Payne's killer Roy Whiting will spend at least 50 years in jail, the Government announced after declaring: 'Life should definitely mean life'.