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Sodium-24 is radioactive and can be created from common sodium-23 by neutron activation. With a half-life of 14.9560(15) h, 24 Na decays to 24 Mg by emission of an electron and two gamma rays. [10] [11] Exposure of the human body to intense neutron radiation creates 24 Na in the blood plasma.
10 −24 seconds hydrogen-5: 86(6) lithium-4: 91(9) hydrogen-4: 139(10) nitrogen-10: 143(36) ... sodium-24: 14.96 53.9 americium-242: 16.02 57.7 fermium-255: 20.07 72 ...
Aluminium can capture a neutron and generate radioactive sodium-24, which has a half life of 15 hours [9] [10] and a beta decay energy of 5.514 MeV. [11] The activation of a number of test target elements such as sulfur, copper, tantalum, and gold have been used to determine the yield of both pure fission [12] [13] and thermonuclear weapons. [14]
Liquid metallic sodium may be used to carry heat from the core. Sodium has only one stable isotope, sodium-23, which is a weak neutron absorber.When it does absorb a neutron it produces sodium-24, which has a half-life of 15 hours and decays to stable isotope magnesium-24.
This is highly radioactive, emitting an energetic gamma ray of 2.7 MeV followed by a beta decay to form magnesium-24. Half-life is only 15 hours, so this isotope is not a long-term hazard. Nevertheless, the presence of sodium-24 further necessitates the use of the intermediate coolant loop between the reactor and the turbines.
An example of positron emission (β + decay) is the decay of magnesium-23 into sodium-23 with a half-life of about 11.3 s: 23 12 Mg → 23 11 Na + e + + ν e. β + decay also results in nuclear transmutation, with the daughter element having an atomic number that is decreased by one. A beta spectrum, showing a typical division of energy between ...
For instance, many deli meats are loaded with sodium—and some contain upwards of a quarter of the recommended sodium in an entire day.The American Heart Association (AHA) recommends an upper ...
Unstable isotopes decay through various radioactive decay pathways, most commonly alpha decay, beta decay, or electron capture. Many rare types of decay, such as spontaneous fission or cluster decay, are known. (See Radioactive decay for details.) [citation needed] Of the first 82 elements in the periodic table, 80 have isotopes considered to ...