Trace radioisotope
A trace radioisotope is a
natural radioactivity, such as the production of plutonium-239[1] and uranium-236[2] from neutron capture[3] by natural uranium
.
Elements
The elements that occur on Earth only in traces are listed below.
| Element name | Chemical Symbol |
|---|---|
| Technetium | Tc |
| Promethium | Pm |
| Polonium | Po |
| Astatine | At |
| Radon | Rn |
| Francium | Fr |
| Radium | Ra |
| Actinium | Ac |
| Protactinium | Pa |
| Neptunium | Np |
| Plutonium | Pu |
Isotopes of other elements (not exhaustive):
- Tritium
- Beryllium-7
- Beryllium-10
- Carbon-14
- Fluorine-18
- Sodium-22
- Sodium-24
- Magnesium-28
- Silicon-31
- Silicon-32
- Phosphorus-32
- Sulfur-35
- Sulfur-38
- Chlorine-34m
- Chlorine-36
- Chlorine-38
- Chlorine-39
- Argon-39
- Argon-42
- Calcium-41
- Iron-60
- Nickel-59
- Selenium-79
- Krypton-81
- Strontium-90
References
- ^ Curtis, David; Fabryka-Martin, June; Paul, Dixon; Cramer, Jan (1999). "Nature's uncommon elements: plutonium and technetium". Geochimica et Cosmochimica Acta. 63 (2): 275–285. .
- ^ "Technical sheet about (nuclear) mass spectrometry" (PDF). Archived from the original (PDF) on 22 July 2011. Retrieved 28 August 2009.
- ^
Wilcken, K.~M.; Barrows, T. T.; Fifield, L. K.; Tims, S. G.; Steier, P. (June 2007). "AMS of natural 236 U and 239Pu produced in uranium ores". Nuclear Instruments and Methods in Physics Research B. 259 (1): 727–732. S2CID 96531059.
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