Argon-34

Properties and data of the isotope ³⁴Ar.

Content

General data

Name of the isotope:Argon-34; Ar-34Symbol:³⁴Ar or 3418ArMass number A:34 (= number of nucleons)Atomic number Z:18 (= number of protons)Neutrons N:16Isotopic mass:33.98027009(8) u (atomic weight of Argon-34)Nuclide mass:33.9703958 u (calculated nuclear mass without electrons)Mass excess:-18.37829 MeVMass defect:0.29921914200001 u (per nucleus)Nuclear binding energy:278.72083546 MeV (per nucleus)
8.19767163 MeV (average binding energy per nucleon)Separation energy:S_N = 17.0653(4) MeV (first neutron)
S_P = 4.6639(4) MeV (first proton)Half-life:843.8(4) msDecay constant λ:0.82145909049531 s^-1Specific activity α:1.499073440496 × 10⁺²² Bq g^-1
405154983917.97 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:3.3654(40) femtometer fmMirror nucleus:Sulfur-34Year of discovery:1966

Radioactive Decay

Half-life T_½ = 843.8(4) ms respectively 8.438 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	³⁴Cl	100 %	6.06264 MeV

Parent Nuclides

Direct parent isotope is: ³⁵Ca.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 16) and isobaric (same nucleon number A = 34) with Argon-34. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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