Gold-194
Properties and data of the isotope 194Au.
See also: List of individual Gold isotopes (and general data sources).
General data
Name of the isotope:Gold-194; Au-194Symbol:194Au or 19479AuMass number A:194 (= number of nucleons)Atomic number Z:79 (= number of protons)Neutrons N:115Isotopic mass:193.9654191(23) u (atomic weight of Gold-194)Nuclide mass:193.922086 u (calculated nuclear mass without electrons)Mass excess:-32.2119 MeVMass defect:1.649223768 u (per nucleus)Nuclear binding energy:1536.24204455 MeV (per nucleus)
7.91877343 MeV (average binding energy per nucleon)Separation energy:SN = 6.878(9) MeV (first neutron)
SP = 5.0213(25) MeV (first proton)Half-life:38.02(10) hDecay constant λ:5.064199986556 × 10-6 s-1Specific activity α:1.580172314089 × 10+16 Bq g-1
427073.59840265 Ci g-1Spin and parity:
(nuclear angular momentum)1-Magnetic dipole moment:μ(μN) = + 0.0763(13)Quadrupole moment Q:- 0.240(9) barn (100 fm2)Nuclear g-factor:gl = 0.0763Charge radius:5.4252(40) femtometer fmYear of discovery:1948
Radioactive Decay
Half-life T½ = 38.02(10) h (hours) respectively 1.36872 × 105 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 194Pt | 100 % | 2.5481(22) MeV | |
Parent Nuclides
Direct parent isotope is: 194Hg.
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 |
|---|
| 194m1Au | 107.4(5) keV | 600(8) ms | (5+) |
| 194m2Au | 475.8(6) keV | 420(10) ms | (11-) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 115) and isobaric (same nucleon number A = 194) with Gold-194. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 115 | Isobar A = 194 |
|---|
| 70 | 185Yb | |
| 71 | 186Lu | |
| 72 | 187Hf | |
| 73 | 188Ta | 194Ta |
| 74 | 189W | 194W |
| 75 | 190Re | 194Re |
| 76 | 191Os | 194Os |
| 77 | 192Ir | 194Ir |
| 78 | 193Pt | 194Pt |
| 79 | 194Au | 194Au |
| 80 | 195Hg | 194Hg |
| 81 | 196Tl | 194Tl |
| 82 | 197Pb | 194Pb |
| 83 | 198Bi | 194Bi |
| 84 | 199Po | 194Po |
| 85 | 200At | 194At |
| 86 | 201Rn | 194Rn |
| 87 | 202Fr | |
| 88 | 203Ra | |
| 89 | 204Ac | |
External data and identifiers
Last update: 2020-10-22
Perma link: https://www.chemlin.org/isotope/gold-194
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