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Potassium-37 is a radioisotope of the chemical element potassium, which, in addition to the element-specific 19 protons, has 18 neutrons in the atomic nucleus, resulting in the mass number 37. The very short-lived, unstable and therefore radioactive nuclide, which can only be produced artificially, has no practical significance; The study of 37K serves exclusively academic purposes.
See also: list of Potassium isotopes.
The atomic nucleus of the nuclide potassium-37 undergoes a β+ decay to form the also unstable nuclide argon-37; Since the decay product is the mirror nucleus (reverse neutron and proton number), this is also referred to as mirror decay:
37 19K → 3718Ar + β+ + v.
Some decay data were remeasured and published in an article from 2014 [1]: According to this, the half-life of the nuclide is 1.23651(94) s.Half-life T½ = 1.225(7) s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|---|---|---|---|
β+ | 37Ar | 100 % | 6.14748(23) MeV |
Direct parent isotopes are: 37Ca, 39Ti.
OZ | Isotone N = 18 | Isobar A = 37 |
---|---|---|
7 | 25N | |
8 | 26O | |
9 | 27F | |
10 | 28Ne | |
11 | 29Na | 37Na |
12 | 30Mg | 37Mg |
13 | 31Al | 37Al |
14 | 32Si | 37Si |
15 | 33P | 37P |
16 | 34S | 37S |
17 | 35Cl | 37Cl |
18 | 36Ar | 37Ar |
19 | 37K | 37K |
20 | 38Ca | 37Ca |
21 | 39Sc | 37Sc |
22 | 40Ti | |
23 | 41V | |
24 | 42Cr | |
25 | 43Mn |
[1] - P. D. Shidling, D. Melconian, S. Behling et al.:
Precision half-life measurement of the β+ decay of 37K.
In: Physical Review C, 90, 032501(R), (2014), DOI 10.1103/PhysRevC.90.032501.
Last update: 2023-12-04
Perma link: https://www.chemlin.org/isotope/potassium-37
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