Potassium-44
Properties and data of the isotope 44K.
See also: list of Potassium isotopes.
General data
Name of the isotope:Potassium-44; K-44Symbol:44K or 4419KMass number A:44 (= number of nucleons)Atomic number Z:19 (= number of protons)Neutrons N:25Isotopic mass:43.9615870(5) u (atomic weight of Potassium-44)Nuclide mass:43.9511642 u (calculated nuclear mass without electrons)Mass excess:-35.78148 MeVMass defect:0.40371150799999 u (per nucleus)Nuclear binding energy:376.05484743 MeV (per nucleus)
8.54670108 MeV (average binding energy per nucleon)Separation energy:SN = 7.2774(6) MeV (first neutron)
SP = 11.061(5) MeV (first proton)Half-life:22.13(19) minDecay constant λ:0.00052202679662596 s-1Specific activity α:7.310974190565 × 10+18 Bq g-1
197593897.04231 Ci g-1Spin and parity:
(nuclear angular momentum)2-Magnetic dipole moment:μ(μN) = - 0.856(4)Nuclear g-factor:gl = -0.428Charge radius:3.4563(101) femtometer fmMirror nucleus:Manganese-44Year of discovery:1954
Radioactive Decay
Half-life T½ = 22.13(19) min (minutes) respectively 1.3278 × 103 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β- | 44Ca | 100 % | 5.6872(5) MeV | |
Parent Nuclides
Direct parent isotope is: 44Ar.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 25) and isobaric (same nucleon number A = 44) with Potassium-44. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 25 | Isobar A = 44 |
11 | 36Na | |
12 | 37Mg | |
13 | 38Al | |
14 | 39Si | 44Si |
15 | 40P | 44P |
16 | 41S | 44S |
17 | 42Cl | 44Cl |
18 | 43Ar | 44Ar |
19 | 44K | 44K |
20 | 45Ca | 44Ca |
21 | 46Sc | 44Sc |
22 | 47Ti | 44Ti |
23 | 48V | 44V |
24 | 49Cr | 44Cr |
25 | 50Mn | 44Mn |
26 | 51Fe | |
27 | 52Co | |
28 | 53Ni | |
29 | 54Cu | |
30 | 55Zn | |
External data and identifiers
Last update: 2023-10-04
Perma link: https://www.chemlin.org/isotope/potassium-44
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