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Potassium-40 (40 K) is a radioactive isotope of potassium which has a long half-life of 1.25 billion years. It makes up about 0.012% (120 ppm) of the total amount of potassium found in nature. Potassium-40 undergoes three types of radioactive decay.
Potassium-40 - symbol 40 K - is a naturally occurring, primordial, radioactive isotope of the chemical element potassium with a half-life of 1.25 billion years; Earth's potassium consists of about 0.0117% (117 ppm) of this isotope, which is responsible for the weak natural radioactivity of the alkali metal.
Potassium 40 is a radioisotope found in trace amounts in natural potassium, is at the origin of more than half of the human body activity: undergoing between 4 and 5,000 decays every second for an 80kg man.
The long half-life of this primordial radioisotope is caused by a highly spin-forbidden transition: 40 K has a nuclear spin of 4, while both of its decay daughters are even–even isotopes with spins of 0.
24 sie 2022 · Potassium-40 (40K) is a radioactive isotope of potassium which has a long half-life of 1.25 billion years. It makes up about 0.012% (120 ppm) of the total amount of potassium found in nature.
K-40 is a radioactive isotope of potassium with a long half-life of 1.251×10 9 years and undergoes both types of beta decay. From this point of view, the human body can also be considered a source of antimatter.
Potassium-40 is found almost everywhere, its peak is observed on all background spectra. In a more concentrated form, it can be found in fertilizers (e.g., potassium chloride), or products that have been grown with such fertilizers.
