Gold-175m

Properties and data of the isotope ¹⁷⁵Au.

Content

General data

Name of the isotope:Gold-175m; Au-175mSymbol:¹⁷⁵Au or 17579AuMass number A:175 (= number of nucleons)Atomic number Z:79 (= number of protons)Neutrons N:96Isotopic mass:174.98132(4) u (atomic weight of Gold-175m)
Excitation energy: +x keVNuclide mass:174.9379869 u (calculated nuclear mass without electrons)Mass excess:-17.40031 MeVMass defect:1.468689464 u (per nucleus)Nuclear binding energy:1368.07542358 MeV (per nucleus)
7.81757385 MeV (average binding energy per nucleon)Half-life:156(5) msDecay constant λ:4.4432511574355 s^-1Specific activity α:1.537809445181 × 10⁺²² Bq g^-1
415624174373.32 Ci g^-1Spin and parity:
(nuclear angular momentum)(11/2-)

Radioactive Decay

Half-life T_½ = 156(5) ms respectively 1.56 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁷¹Ir	94 %
EE/β⁺	¹⁷⁵Pt	6 %

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
¹⁷⁵Au			(1/2+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 96) and isobaric (same nucleon number A = 175) with Gold-175m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 96	Isobar A = 175
55	¹⁵¹Cs
56	¹⁵²Ba
57	¹⁵³La
58	¹⁵⁴Ce
59	¹⁵⁵Pr
60	¹⁵⁶Nd
61	¹⁵⁷Pm
62	¹⁵⁸Sm
63	¹⁵⁹Eu
64	¹⁶⁰Gd
65	¹⁶¹Tb
66	¹⁶²Dy
67	¹⁶³Ho	¹⁷⁵Ho
68	¹⁶⁴Er	¹⁷⁵Er
69	¹⁶⁵Tm	¹⁷⁵Tm
70	¹⁶⁶Yb	¹⁷⁵Yb
71	¹⁶⁷Lu	¹⁷⁵Lu
72	¹⁶⁸Hf	¹⁷⁵Hf
73	¹⁶⁹Ta	¹⁷⁵Ta
74	¹⁷⁰W	¹⁷⁵W
75	¹⁷¹Re	¹⁷⁵Re
76	¹⁷²Os	¹⁷⁵Os
77	¹⁷³Ir	¹⁷⁵Ir
78	¹⁷⁴Pt	¹⁷⁵Pt
79	¹⁷⁵Au	¹⁷⁵Au
80	¹⁷⁶Hg	¹⁷⁵Hg
81	¹⁷⁷Tl
82	¹⁷⁸Pb