Gold-174

Properties and data of the isotope ¹⁷⁴Au.

Content

General data

Name of the isotope:Gold-174; Au-174Symbol:¹⁷⁴Au or 17479AuMass number A:174 (= number of nucleons)Atomic number Z:79 (= number of protons)Neutrons N:95Isotopic mass:173.98472(9) u (atomic weight of Gold-174)Nuclide mass:173.9413869 u (calculated nuclear mass without electrons)Mass excess:-14.23323 MeVMass defect:1.456624548 u (per nucleus)Nuclear binding energy:1356.83702671 MeV (per nucleus)
7.79791395 MeV (average binding energy per nucleon)Separation energy:S_N = 9.47(9) MeV (first neutron)Half-life:120(20) msDecay constant λ:5.7762265046662 s^-1Specific activity α:2.010708072254 × 10⁺²² Bq g^-1
543434614122.78 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:1983

Radioactive Decay

Half-life T_½ = 120(20) ms respectively 1.20 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁷⁰Ir	> 0 %	6.699(7) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 95) and isobaric (same nucleon number A = 174) with Gold-174. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 95	Isobar A = 174
55	¹⁵⁰Cs
56	¹⁵¹Ba
57	¹⁵²La
58	¹⁵³Ce
59	¹⁵⁴Pr
60	¹⁵⁵Nd
61	¹⁵⁶Pm
62	¹⁵⁷Sm
63	¹⁵⁸Eu
64	¹⁵⁹Gd
65	¹⁶⁰Tb
66	¹⁶¹Dy	¹⁷⁴Dy
67	¹⁶²Ho	¹⁷⁴Ho
68	¹⁶³Er	¹⁷⁴Er
69	¹⁶⁴Tm	¹⁷⁴Tm
70	¹⁶⁵Yb	¹⁷⁴Yb
71	¹⁶⁶Lu	¹⁷⁴Lu
72	¹⁶⁷Hf	¹⁷⁴Hf
73	¹⁶⁸Ta	¹⁷⁴Ta
74	¹⁶⁹W	¹⁷⁴W
75	¹⁷⁰Re	¹⁷⁴Re
76	¹⁷¹Os	¹⁷⁴Os
77	¹⁷²Ir	¹⁷⁴Ir
78	¹⁷³Pt	¹⁷⁴Pt
79	¹⁷⁴Au	¹⁷⁴Au
80	¹⁷⁵Hg	¹⁷⁴Hg
81	¹⁷⁶Tl