Gold-182

Properties and data of the isotope ¹⁸²Au.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Gold-182; Au-182Symbol:¹⁸²Au or 18279AuMass number A:182 (= number of nucleons)Atomic number Z:79 (= number of protons)Neutrons N:103Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.3037974683544 (= neutron-proton ratio)Neutron excess (N-Z):24Isotopic mass:181.969618(22) u (atomic weight of Gold-182)Nuclide mass:181.9262849 u (calculated nuclear mass without electrons)Mass excess:-28.30065 MeVMass defect:1.541045876 u (per nucleus)Nuclear binding energy:1435.47498722 MeV (per nucleus)
7.8872252 MeV (average binding energy per nucleon)Separation energy:S_N = 8.501(28) MeV (first neutron)
S_P = 1.208(24) MeV (first proton)Half-life:15.5(4) sDecay constant λ:0.044719172939351 s^-1Specific activity α:1.48787380431 × 10⁺²⁰ Bq g^-1
4021280552.1973 Ci g^-1Spin and parity:
(nuclear angular momentum)(2+)Magnetic dipole moment:μ(μ_N) = 1.30(10)Nuclear g-factor:g_l = 0.65Year of discovery:1970

Radioactive Decay

Half-life T_½ = 15.5(4) s respectively 1.55 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁷⁸Ir	0.13(5) %	5.526(4) MeV
EC/β⁺	¹⁸²Pt	99.87(5) %	7.868(24) MeV

Parent Nuclides

Direct parent isotope is: ¹⁸²Hg.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 103) and isobaric (same nucleon number A = 182) with Gold-182. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 103	Isobar A = 182
60	¹⁶³Nd
62	¹⁶⁵Sm
63	¹⁶⁶Eu
64	¹⁶⁷Gd
65	¹⁶⁸Tb
66	¹⁶⁹Dy
67	¹⁷⁰Ho
68	¹⁷¹Er
69	¹⁷²Tm
70	¹⁷³Yb	¹⁸²Yb
71	¹⁷⁴Lu	¹⁸²Lu
72	¹⁷⁵Hf	¹⁸²Hf
73	¹⁷⁶Ta	¹⁸²Ta
74	¹⁷⁷W	¹⁸²W
75	¹⁷⁸Re	¹⁸²Re
76	¹⁷⁹Os	¹⁸²Os
77	¹⁸⁰Ir	¹⁸²Ir
78	¹⁸¹Pt	¹⁸²Pt
79	¹⁸²Au	¹⁸²Au
80	¹⁸³Hg	¹⁸²Hg
81	¹⁸⁴Tl	¹⁸²Tl
82	¹⁸⁵Pb	¹⁸²Pb
83	¹⁸⁶Bi
84	¹⁸⁷Po
85	¹⁸⁸At