Gold-193

Properties and data of the isotope ¹⁹³Au.

Content

General data

Name of the isotope:Gold-193; Au-193Symbol:¹⁹³Au or 19379AuMass number A:193 (= number of nucleons)Atomic number Z:79 (= number of protons)Neutrons N:114Isotopic mass:192.964138(9) u (atomic weight of Gold-193)Nuclide mass:192.9208049 u (calculated nuclear mass without electrons)Mass excess:-33.40524 MeVMass defect:1.641839952 u (per nucleus)Nuclear binding energy:1529.36406425 MeV (per nucleus)
7.92416614 MeV (average binding energy per nucleon)Separation energy:S_N = 8.704(18) MeV (first neutron)
S_P = 4.405(9) MeV (first proton)Half-life:17.65(15) hDecay constant λ:1.090883192571 × 10^-5 s^-1Specific activity α:3.421589712189 × 10⁺¹⁶ Bq g^-1
924753.97626735 Ci g^-1Spin and parity:
(nuclear angular momentum)3/2+Magnetic dipole moment:μ(μ_N) = + 0.1396(5)Quadrupole moment Q:+ 0.664(20) barn (100 fm²)Nuclear g-factor:g_l = 0.093066666666667Charge radius:5.4221(42) femtometer fmYear of discovery:1948

Radioactive Decay

Half-life T_½ = 17.65(15) h (hours) respectively 6.3540 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	¹⁹³Pt	100 %	1.075(9) MeV

Parent Nuclides

Direct parent isotope is: ¹⁹³Hg.

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
^193m1Au	290.20(4) keV	3.9(3) s	11/2-
^193m2Au	2486.7(6) keV	150(50) ns	(31/2+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 114) and isobaric (same nucleon number A = 193) with Gold-193. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 114	Isobar A = 193
70	¹⁸⁴Yb
71	¹⁸⁵Lu
72	¹⁸⁶Hf
73	¹⁸⁷Ta	¹⁹³Ta
74	¹⁸⁸W	¹⁹³W
75	¹⁸⁹Re	¹⁹³Re
76	¹⁹⁰Os	¹⁹³Os
77	¹⁹¹Ir	¹⁹³Ir
78	¹⁹²Pt	¹⁹³Pt
79	¹⁹³Au	¹⁹³Au
80	¹⁹⁴Hg	¹⁹³Hg
81	¹⁹⁵Tl	¹⁹³Tl
82	¹⁹⁶Pb	¹⁹³Pb
83	¹⁹⁷Bi	¹⁹³Bi
84	¹⁹⁸Po	¹⁹³Po
85	¹⁹⁹At	¹⁹³At
86	²⁰⁰Rn	¹⁹³Rn
87	²⁰¹Fr
88	²⁰²Ra