Gold-180

Properties and data of the isotope ¹⁸⁰Au.

Content

General data

Name of the isotope:Gold-180; Au-180Symbol:¹⁸⁰Au or 18079AuMass number A:180 (= number of nucleons)Atomic number Z:79 (= number of protons)Neutrons N:101Isotopic mass:179.972490(5) u (atomic weight of Gold-180)Nuclide mass:179.9291569 u (calculated nuclear mass without electrons)Mass excess:-25.6254 MeVMass defect:1.520844044 u (per nucleus)Nuclear binding energy:1416.65710192 MeV (per nucleus)
7.87031723 MeV (average binding energy per nucleon)Separation energy:S_N = 8.708(13) MeV (first neutron)
S_P = 0.646(9) MeV (first proton)Half-life:8.4(6) sDecay constant λ:0.082517521495232 s^-1Specific activity α:2.776157194732 × 10⁺²⁰ Bq g^-1
7503127553.3314 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:1977

Radioactive Decay

Half-life T_½ = 8.4(6) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁷⁶Ir	≥ 1.8 %	5.828(17) MeV
EE/β⁺	¹⁸⁰Pt	≤ 98.2 %	8.810(12) MeV

Parent Nuclides

Direct parent isotopes are: ¹⁸⁴Tl, ¹⁸⁰Hg.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 101) and isobaric (same nucleon number A = 180) with Gold-180. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 101	Isobar A = 180
59	¹⁶⁰Pr
60	¹⁶¹Nd
61	¹⁶²Pm
62	¹⁶³Sm
63	¹⁶⁴Eu
64	¹⁶⁵Gd
65	¹⁶⁶Tb
66	¹⁶⁷Dy
67	¹⁶⁸Ho
68	¹⁶⁹Er
69	¹⁷⁰Tm
70	¹⁷¹Yb	¹⁸⁰Yb
71	¹⁷²Lu	¹⁸⁰Lu
72	¹⁷³Hf	¹⁸⁰Hf
73	¹⁷⁴Ta	¹⁸⁰Ta
74	¹⁷⁵W	¹⁸⁰W
75	¹⁷⁶Re	¹⁸⁰Re
76	¹⁷⁷Os	¹⁸⁰Os
77	¹⁷⁸Ir	¹⁸⁰Ir
78	¹⁷⁹Pt	¹⁸⁰Pt
79	¹⁸⁰Au	¹⁸⁰Au
80	¹⁸¹Hg	¹⁸⁰Hg
81	¹⁸²Tl	¹⁸⁰Tl
82	¹⁸³Pb	¹⁸⁰Pb
83	¹⁸⁴Bi