Potassium-40
Potassium-40 (40K) is a radioactive isotope of potassium which has a very long half-life of 1.251×109 years. It makes up 0.012% (120 ppm) of the total amount of potassium found in nature. Potassium-40 is a rare example of an isotope that undergoes all three types of beta decay. About 89.28% of the time, it decays to calcium-40 (40Ca) with emission of a beta particle (β−, an electron) with a maximum energy of 1.33 MeV and an antineutrino. About 10.72% of the time it decays to argon-40 (40Ar) by electron capture, with the emission of a 1.460 MeV gamma ray and a neutrino. The radioactive decay of this particular isotope explains the large abundance of argon (nearly 1%) in the earth's atmosphere. Very rarely (0.001% of the time) it will decay to 40Ar by emitting a positron (β+) and a neutrino.
Potassium-40
Potassium-40 (40K) is a radioactive isotope of potassium which has a very long half-life of 1.251×109 years. It makes up 0.012% (120 ppm) of the total amount of potassium found in nature. Potassium-40 is a rare example of an isotope that undergoes all three types of beta decay. About 89.28% of the time, it decays to calcium-40 (40Ca) with emission of a beta particle (β−, an electron) with a maximum energy of 1.33 MeV and an antineutrino. About 10.72% of the time it decays to argon-40 (40Ar) by electron capture, with the emission of a 1.460 MeV gamma ray and a neutrino. The radioactive decay of this particular isotope explains the large abundance of argon (nearly 1%) in the earth's atmosphere. Very rarely (0.001% of the time) it will decay to 40Ar by emitting a positron (β+) and a neutrino.
has abstract
Kalium-40 of 40K is een onstab ...... bedraagt ongeveer 265,4 kBq/g.
@nl
Kа́лий-40 (лат. Kalium-40) — р ...... калия равна примерно 31 Бк/г.
@ru
Le potassium 40, noté 40K, est ...... ues rouges en petite quantité.
@fr
O potássio-40 (40K) é um isóto ...... pósitron (β + ) e um neutrino.
@pt
Potassium-40 (40K) is a radioa ...... positron (β+) and a neutrino.
@en
カリウム40 (Potassium-40) は天然カリウム中 ...... め、やや不安定で放射性同位体である。半減期は12.48億年。
@ja
钾-40(40K)是钾元素的一种放射性同位素,原子核不稳定, ...... 法的依据,具有广泛的用途。地球上的氩气也有很多来自它的衰变。
@zh
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Wikipage page ID
13,677,688
Wikipage revision ID
741,591,741
abundance
after
argon-40, calcium-40, Stable
element
heavier
image caption
lighter
mass
3.996399848e+1
mass number
num neutrons
num protons
type
comment
Kalium-40 of 40K is een onstab ...... bedraagt ongeveer 265,4 kBq/g.
@nl
Kа́лий-40 (лат. Kalium-40) — р ...... калия равна примерно 31 Бк/г.
@ru
Le potassium 40, noté 40K, est ...... ues rouges en petite quantité.
@fr
O potássio-40 (40K) é um isóto ...... m 1,33 MeV, e um antineutrino.
@pt
Potassium-40 (40K) is a radioa ...... positron (β+) and a neutrino.
@en
カリウム40 (Potassium-40) は天然カリウム中 ...... め、やや不安定で放射性同位体である。半減期は12.48億年。
@ja
钾-40(40K)是钾元素的一种放射性同位素,原子核不稳定, ...... 法的依据,具有广泛的用途。地球上的氩气也有很多来自它的衰变。
@zh
label
Kalium-40
@nl
Potassium 40
@fr
Potassium-40
@en
Potássio-40
@pt
Калий-40
@ru
カリウム40
@ja
钾-40
@zh