Difference between revisions of "Rate of Decay"
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Rate of Decay
</dt>
1. Of a sound, the time rate at which the sound pressure level (or other stated
characteristic) decreases at a given point and at a given time. A commonly
used unit is the decibel per second.
</dd>
2. Of a radioactive nuclide, the number of nuclei of that nuclide changing
(or disintegrating) per unit time. It is usually expressed as the instantaneous
rate of decay by - dN/dt where N is the total number of the
state nuclides present at the given time t.
</dd>
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use
