Gold-176

Properties and data of the isotope ¹⁷⁶Au.

Contents

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

General data

Name of the isotope:Gold-176; Au-176Symbol:¹⁷⁶Au or 17679AuMass number A:176 (= number of nucleons)Atomic number Z:79 (= number of protons)Neutrons N:97Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.2278481012658 (= neutron-proton ratio)Neutron excess (N-Z):18Isotopic mass:175.98012(4) u (atomic weight of Gold-176)Nuclide mass:175.9367869 u (calculated nuclear mass without electrons)Mass excess:-18.5181 MeVMass defect:1.47855438 u (per nucleus)Nuclear binding energy:1377.26453364 MeV (per nucleus)
7.82536667 MeV (average binding energy per nucleon)Separation energy:S_N = 9.19(5) MeV (first neutron)
S_P = 0.10(4) MeV (first proton)Half-life:Spin and parity:
(nuclear angular momentum)Year of discovery:1975

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
^176m1Au	+x keV	1.05(1) s	(3-)
^176m2Au	+y keV	1.36(2) s	(9+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 97) and isobaric (same nucleon number A = 176) with Gold-176. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 97	Isobar A = 176
56	¹⁵³Ba
57	¹⁵⁴La
58	¹⁵⁵Ce
59	¹⁵⁶Pr
60	¹⁵⁷Nd
61	¹⁵⁸Pm
62	¹⁵⁹Sm
63	¹⁶⁰Eu
64	¹⁶¹Gd
65	¹⁶²Tb
66	¹⁶³Dy
67	¹⁶⁴Ho
68	¹⁶⁵Er	¹⁷⁶Er
69	¹⁶⁶Tm	¹⁷⁶Tm
70	¹⁶⁷Yb	¹⁷⁶Yb
71	¹⁶⁸Lu	¹⁷⁶Lu
72	¹⁶⁹Hf	¹⁷⁶Hf
73	¹⁷⁰Ta	¹⁷⁶Ta
74	¹⁷¹W	¹⁷⁶W
75	¹⁷²Re	¹⁷⁶Re
76	¹⁷³Os	¹⁷⁶Os
77	¹⁷⁴Ir	¹⁷⁶Ir
78	¹⁷⁵Pt	¹⁷⁶Pt
79	¹⁷⁶Au	¹⁷⁶Au
80	¹⁷⁷Hg	¹⁷⁶Hg
81	¹⁷⁸Tl	¹⁷⁶Tl
82	¹⁷⁹Pb