Potassium-50
Properties and data of the isotope 50K.
See also: list of Potassium isotopes.
General data
Name of the isotope:Potassium-50; K-50Symbol:50K or 5019KMass number A:50 (= number of nucleons)Atomic number Z:19 (= number of protons)Neutrons N:31Isotopic mass:49.972380(8) u (atomic weight of Potassium-50)Nuclide mass:49.9619572 u (calculated nuclear mass without electrons)Mass excess:-25.72786 MeVMass defect:0.444908004 u (per nucleus)Nuclear binding energy:414.42913628 MeV (per nucleus)
8.28858273 MeV (average binding energy per nucleon)Separation energy:SN = 4.188(8) MeV (first neutron)
SP = 15.83(40) MeV (first proton)Half-life:472(4) msDecay constant λ:1.4685321622033 s-1Specific activity α:1.804838273088 × 10+22 Bq g-1
487794127861.86 Ci g-1Spin and parity:
(nuclear angular momentum)0(-)Year of discovery:1972
Radioactive Decay
Half-life T½ = 472(4) ms respectively 4.72 × 10-1 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β- | 50Ca | 71(3) % | 13.861(8) MeV | |
β-, n | 49Ca | 29(3) % | 7.501(8) MeV | |
β-, 2n ? | 48Ca | | | |
Nuclear Isomers
Nuclear isomers or excited states with the activation energy in keV related to the ground state.
Nuclear Isomer | Excitation Energy | Half-life | Spin |
---|
50mK | 172.0(4) keV | 131(40) ns | (2-) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 31) and isobaric (same nucleon number A = 50) with Potassium-50. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 31 | Isobar A = 50 |
15 | 46P | |
16 | 47S | |
17 | 48Cl | 50Cl |
18 | 49Ar | 50Ar |
19 | 50K | 50K |
20 | 51Ca | 50Ca |
21 | 52Sc | 50Sc |
22 | 53Ti | 50Ti |
23 | 54V | 50V |
24 | 55Cr | 50Cr |
25 | 56Mn | 50Mn |
26 | 57Fe | 50Fe |
27 | 58Co | 50Co |
28 | 59Ni | 50Ni |
29 | 60Cu | |
30 | 61Zn | |
31 | 62Ga | |
32 | 63Ge | |
33 | 64As | |
34 | 65Se | |
35 | 66Br | |
36 | 67Kr | |
External data and identifiers
Last update: 2020-10-12
Perma link: https://www.chemlin.org/isotope/potassium-50
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