decay rate


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Related to decay rate: radioactive decay rate

decay rate

[di′kā ‚rāt]
(nuclear physics)
The time rate of disintegration of radioactive material, generally accompanied by emission of particles or gamma radiation.

decay rate

1. At a given frequency, the rate at which the sound level in a room decreases after a source stops emitting sound; expressed in decibels per second (dB/s).
2. Of sound waves in an enclosed space, the rate at which the sound-pressure level of reverberation decreases; usually expressed in decibels per second.
3. Of a vibrating mechanical system, the rate at which some stated characteristic (such as the amplitude of vibration) decreases with time.
References in periodicals archive ?
Order-[alpha] corrections to the decay rate of ortopositronium in the Fried-Yennie gauge.
n] = natural decay rate constant (determined from scenario D), 1/min.
20 /PRNewswire/ -- Dentists must be embarrassed when pre-school children's tooth decay rates doubled after fluoridation became Kentucky law.
However, in the United Kingdom, where only 10% drink fluoridated water, tooth decay rates are equal too or better than those of the U.
Turkevich and his colleagues found a decay rate of about 0.
And in our model, a change in the activity decay rate is all you need to have a different sense of 'what time' it is," the Daily Mail quoted lead researcher Geoffrey Ghose as telling New Scientist.
Figure 8 shows that changing the outdoor air fraction to 40% provides a much better match in the decay rate (justified since the OA fraction measurement had a high measurement uncertainty).
If the decay rate is accurate then we predict that DNA fragments of sufficient length will preserve in frozen fossil bone of around one million years in age," Bunce said.
The electron neutrino correlation, a, expresses the dependence of decay rate on the angle between the neutrino and electron, cos(Vev) = cos(Ve)cos(Vv) + sin(Ve)sin(Vv)cos([phi]e - [phi]v).
If you go to Birkenhead the decay rate is much higher, but even in well-off areas you still get a high level.