Gold-192m1

Properties and data of the isotope ¹⁹²Au.

Content

General data

Name of the isotope:Gold-192m1; Au-192m1Symbol:¹⁹²Au or 19279AuMass number A:192 (= number of nucleons)Atomic number Z:79 (= number of protons)Neutrons N:113Isotopic mass:191.964818(17) u (atomic weight of Gold-192m1)
Excitation energy: 135.41(25) keVNuclide mass:191.9214849 u (calculated nuclear mass without electrons)Mass excess:-32.77182 MeVMass defect:1.632495036 u (per nucleus)Nuclear binding energy:1520.65933106 MeV (per nucleus)
7.92010068 MeV (average binding energy per nucleon)Half-life:29 msDecay constant λ:23.90162691586 s^-1Specific activity α:7.536071417223 × 10⁺²² Bq g^-1
2036776058709 Ci g^-1Spin and parity:
(nuclear angular momentum)(5)+

Radioactive Decay

Half-life T_½ = 29 ms respectively 2.9 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	¹⁹²Au	100 %

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
¹⁹²Au		4.94(9) h	1-
^192m2Au	431.6(5) keV	160(20) ms	(11-)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 113) and isobaric (same nucleon number A = 192) with Gold-192m1. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 113	Isobar A = 192
70	¹⁸³Yb
71	¹⁸⁴Lu
72	¹⁸⁵Hf
73	¹⁸⁶Ta	¹⁹²Ta
74	¹⁸⁷W	¹⁹²W
75	¹⁸⁸Re	¹⁹²Re
76	¹⁸⁹Os	¹⁹²Os
77	¹⁹⁰Ir	¹⁹²Ir
78	¹⁹¹Pt	¹⁹²Pt
79	¹⁹²Au	¹⁹²Au
80	¹⁹³Hg	¹⁹²Hg
81	¹⁹⁴Tl	¹⁹²Tl
82	¹⁹⁵Pb	¹⁹²Pb
83	¹⁹⁶Bi	¹⁹²Bi
84	¹⁹⁷Po	¹⁹²Po
85	¹⁹⁸At	¹⁹²At
86	¹⁹⁹Rn
87	²⁰⁰Fr
88	²⁰¹Ra