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Disk containing 1 μCi of sodium-22. Sodium-22 is a radioactive isotope of sodium, undergoing positron emission to 22 Ne with a half-life of 2.6019(6) years. 22 Na is being investigated as an efficient generator of "cold positrons" to produce muons for catalyzing fusion of deuterium.
This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days and years. Current methods make it difficult to measure half-lives between approximately 10 −19 and 10 −10 seconds.
Sodium is a chemical element; ... 22 Na has a half-life of 2.6 years and 24 Na, a half-life of 15 hours; all other isotopes have a half-life of less than one minute. ...
Sodium-22 and chlorine-36 are commonly used to study ion transporters. However, sodium-22 is hard to screen off and chlorine-36, with a half-life of 300,000 years, has low activity. However, sodium-22 is hard to screen off and chlorine-36, with a half-life of 300,000 years, has low activity.
Sodium, 11 Na; Sodium ... 22 Na trace: 2.6019 y: β + 22 ... half-life (t 1/2) mode
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Half of 12- to 17-year-olds spend four or more hours a day on screens, according to the Centers for Disease Control and Prevention. Of those, a quarter experienced anxiety or depression. Of those ...
“We have discovered that next step on a pathway to life.” This mosaic image of asteroid Bennu, was taken on December 2, 2018 by the OSIRIS-REx spacecraft from a range of 15 miles.