Potassium-36

Properties and data of the isotope ³⁶K.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: List of individual Potassium isotopes (and general data sources).

General data

Name of the isotope:Potassium-36; K-36Symbol:³⁶K or 3619KMass number A:36 (= number of nucleons)Atomic number Z:19 (= number of protons)Neutrons N:17Isotopic mass:35.9813020(4) u (atomic weight of Potassium-36)Nuclide mass:35.9708792 u (calculated nuclear mass without electrons)Mass excess:-17.41707 MeVMass defect:0.31467718 u (per nucleus)Nuclear binding energy:293.11990511 MeV (per nucleus)
8.14221959 MeV (average binding energy per nucleon)Separation energy:S_N = 14.3155(6) MeV (first neutron)
S_P = 1.6587(8) MeV (first proton)Half-life:341(3) msDecay constant λ:2.0326896790614 s^-1Specific activity α:3.497469591956 × 10⁺²² Bq g^-1
945262051880.11 Ci g^-1Spin and parity:
(nuclear angular momentum)2+Magnetic dipole moment:μ(μ_N) = (+) 0.548(1)Mirror nucleus:Chlorine-36Year of discovery:1967

Radioactive Decay

Half-life T_½ = 341(3) ms respectively 3.41 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy
EC/β⁺	³⁶Ar	99.95 %	12.8142 MeV
EC, p	³⁵Cl	0.048(14) %	4.298 MeV
EC, α	³²S	0.0034(13) %	6,165 MeV

Parent Nuclides

Direct parent isotope is: ³⁶Ca.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 17) and isobaric (same nucleon number A = 36) with Potassium-36. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 17	Isobar A = 36
7	²⁴N
8	²⁵O
9	²⁶F
10	²⁷Ne
11	²⁸Na	³⁶Na
12	²⁹Mg	³⁶Mg
13	³⁰Al	³⁶Al
14	³¹Si	³⁶Si
15	³²P	³⁶P
16	³³S	³⁶S
17	³⁴Cl	³⁶Cl
18	³⁵Ar	³⁶Ar
19	³⁶K	³⁶K
20	³⁷Ca	³⁶Ca
21	³⁸Sc	³⁶Sc
22	³⁹Ti
23	⁴⁰V
24	⁴¹Cr
25	⁴²Mn