Argon-53

Properties and data of the isotope ⁵³Ar.

Content

General data

Name of the isotope:Argon-53; Ar-53Symbol:⁵³Ar or 5318ArMass number A:53 (= number of nucleons)Atomic number Z:18 (= number of protons)Neutrons N:35Isotopic mass:53.00729(75) u (atomic weight of Argon-53)Nuclide mass:52.9974157 u (calculated nuclear mass without electrons)Mass excess:6.79059 MeVMass defect:0.43683263600001 u (per nucleus)Nuclear binding energy:406.90697944 MeV (per nucleus)
7.67749018 MeV (average binding energy per nucleon)Half-life:620 nsDecay constant λ:1117979.3234838 s^-1Specific activity α:1.270307351795 × 10⁺²⁸ Bq g^-1
3.433263112960 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:2009

Radioactive Decay

Half-life T_½ = 620 ns respectively 6.2 × 10^-7 seconds s.

Decay mode	Daughter	Probability	Decay energy
β^-	⁵³K	?	19.09(71) MeV
β^-, n	⁵²K	?	15.86(70) MeV
β^-, 2n	⁵¹k	?

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 35) and isobaric (same nucleon number A = 53) with Argon-53. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 35	Isobar A = 53
18	⁵³Ar	⁵³Ar
19	⁵⁴K	⁵³K
20	⁵⁵Ca	⁵³Ca
21	⁵⁶Sc	⁵³Sc
22	⁵⁷Ti	⁵³Ti
23	⁵⁸V	⁵³V
24	⁵⁹Cr	⁵³Cr
25	⁶⁰Mn	⁵³Mn
26	⁶¹Fe	⁵³Fe
27	⁶²Co	⁵³Co
28	⁶³Ni	⁵³Ni
29	⁶⁴Cu	⁵³Cu
30	⁶⁵Zn
31	⁶⁶Ga
32	⁶⁷Ge
33	⁶⁸As
34	⁶⁹Se
35	⁷⁰Br
36	⁷¹Kr
37	⁷²Rb
38	⁷³Sr