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- Q47270 subject Q7010970.
- Q47270 subject Q7013402.
- Q47270 subject Q8980764.
- Q47270 abstract "Half-life (t1⁄2) is the time required for the amount of something to fall to half its initial value. The term is very commonly used in nuclear physics to describe how quickly unstable atoms undergo, or how long stable atoms survive, radioactive decay, and it is also used more generally of any type of exponential or non-exponential decay. The converse of half-life is doubling time.The original term, "half-life period", dating to Ernest Rutherford's discovery of the principle in 1907, was shortened to "half-life" in the early 1950s. Rutherford applied the principle of a radioactive element's half-life to studies of age determination of rocks by measuring the decay period of radium to lead-206.Half-life is constant over the lifetime of an exponentially decaying quantity, and it is a characteristic unit for the exponential decay equation. The table on the right shows the reduction of a quantity as a function of the number of half-lives elapsed.".
- Q47270 thumbnail Halflife-sim.gif?width=300.
- Q47270 wikiPageExternalLink SysDyn3TCBasic.htm.
- Q47270 wikiPageExternalLink www.nucleonica.net.
- Q47270 wikiPageExternalLink Help:Decay_Engine.
- Q47270 wikiPageExternalLink SuboxoneTaperChart.aspx.
- Q47270 wikiPageWikiLink Q1108.
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- Q47270 wikiPageWikiLink Q7010970.
- Q47270 wikiPageWikiLink Q7013402.
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- Q47270 wikiPageWikiLink Q8980764.
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- Q47270 wikiPageWikiLink Q9492.
- Q47270 type Thing.
- Q47270 comment "Half-life (t1⁄2) is the time required for the amount of something to fall to half its initial value. The term is very commonly used in nuclear physics to describe how quickly unstable atoms undergo, or how long stable atoms survive, radioactive decay, and it is also used more generally of any type of exponential or non-exponential decay.".
- Q47270 label "Half-life".
- Q47270 depiction Halflife-sim.gif.