File:Nuclear decay- small population.webm
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Nuclear_decay-_small_population.webm (WebM audio/video file, VP8/Vorbis, length 20 s, 640 × 480 pixels, 142 kbps overall, file size: 346 KB)
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English: Geiger counter readings from a radioactive source consisting of a small number of nuclei. The radiation from background sources grows larger than the signal from the decaying nuclei toward the very end of the process. That's why it can be tricky to do radiometric dating when most of the nuclei have decayed. Carbon dating, for example, is not useful beyond about 60,000 years ago, because not enough of the nuclei linger past that point to get good data.
The time units on the horizontal axis are arbitrary, so this could represent pretty much any type of nucleus. The numbers could be seconds, minutes, years, or centuries (though obviously it's not practical to run Geiger counters for that long!). |
| Date | |
| Source | YouTube: Nuclear decay: small population – View/save archived versions on archive.org and archive.today |
| Author | Matthew Francis |
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Attribution: Matthew Francis
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This file, which was originally posted to YouTube: Nuclear decay: small population(archive), was reviewed on 13 February 2020 by the automatic software YouTubeReviewBot, which confirmed that this video was available there under the stated Creative Commons license on that date. This file should not be deleted if the license has changed in the meantime. The Creative Commons license is irrevocable.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 07:24, 20 June 2018 | 20 s, 640 × 480 (346 KB) | Vislupus (talk | contribs) | Imported media from https://www.youtube.com/watch?v=VuepySONpo0 |
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