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Measure of radioactive decay rate
Answer for the clue "Measure of radioactive decay rate ", 9 letters:
half-life
Word definitions for half-life in dictionaries
Wikipedia
Word definitions in Wikipedia
Half-life is a mathematical and scientific description of exponential or gradual decay. Half-life may also refer to: Biological half-life , the time it takes for a substance to lose half of its pharmacologic, physiologic, or radiologic activity Effective ...
Wiktionary
Word definitions in Wiktionary
n. 1 (context physics English) The time required for half of the nucleus in a sample of a specific isotope to undergo radioactive decay. 2 (context chemistry English) In a chemical reaction, the time required for the concentration of a reactant to fall ...
Longman Dictionary of Contemporary English
Word definitions in Longman Dictionary of Contemporary English
noun COLLOCATIONS FROM CORPUS ■ ADJECTIVE short ▪ These effects are less marked with fentanyl because of its shorter serum half-life . ▪ The daily intake should be divided into at least three doses because of the short half-life . ▪ The third isotope of ...
Douglas Harper's Etymology Dictionary
Word definitions in Douglas Harper's Etymology Dictionary
also halflife , half life , 1864, with meaning "unsatisfactory way of living;" the sense in physics, "amount of time it takes half a given amount of radioactivity to decay" is first attested 1907.
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Half-life \Half"-life`\ (h[aum]f"l[imac]f`), n. (Physics) the time it takes for one-half of a substance decaying in a first-order reaction to be destroyed. For radioactive substances, it is the time required for one-half of the initial amount of the radioactive ...
Usage examples of half-life.
With a drug half-life of three to four hours, that would correspond to a blood level of forty-six nanograms in the first hour.
Its half-life in any other mammaloid creature was just as limited, so a constant supply was needed, for a constant demand.
Oh, to be as others were -- blind in that safest of all blindnesses, living only the hypnoidal half-life into which birth-shock precipitated most humans.
Oh, to be as others were — blind in that safest of all blindnesses, living only the hypnoidal half-life into which birth-shock precipitated most humans.
Unfortunately, it had a short half-life, because at three-thirty my phone rang, and a deep male voice identified himself as the commandant of the Fort Leavenworth Disciplinary Barracks.
The third will be handled only by uninterested people wearing full-body disposable rip-stop coveralls including 50-mil rubber gloves and boots and breathing through masks, who'll seal the kiddie porn in underground vaults where it can sit out its bazillion-year half-life.
It was quite a problem to calculate the exact detonation time, based on the half-life rate of radioactive decay.
I asked my co-worker, Martha, about it, and since she actually took physics in high school, she knows a bit more about quantum physics (if not quantum qats) than I do/did & after going on about isotopes, elements, electrons and protons in the neutral atom (the latter has matching numbers of electrons and protons), she moved on to half-lives, which amounts to time periods.
There are other radioactive nuclides that have half-lives a hundred times longer.
The half-life of the nuclides was less than ten years, but Horstmann would be too hot to touch for at least another century.
There was so much despair permeating the area the half-life would last for another thirty years.
Resurrection Day was just around the corner and the petite bourgeoisie, who flocked in great numbers to just such ceremonies, were lined up waiting to retrieve their half-lifer relatives.
The half-life of media-product grows shorter still, til it threatens to vanish altogether, everting into some weird quantum logic of its own, the Warholian Fifteen Minutes becoming a quark-like blink.
After eight half-lives, only 1/256 of the original radioactive carbon remains, which is too little to make a reliable measurement, so radiocarbon dating works only for objects up to forty thousand or so years old.