Iridium-196
Properties and data of the isotope 196Ir.
See also: List of individual Iridium isotopes (and general data sources).
General data
Name of the isotope:Iridium-196; Ir-196Symbol:196Ir or 19677IrMass number A:196 (= number of nucleons)Atomic number Z:77 (= number of protons)Neutrons N:119Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.5454545454545 (= neutron-proton ratio)Neutron excess (N-Z):42Isotopic mass:195.96840(4) u (atomic weight of Iridium-196)Nuclide mass:195.9261638 u (calculated nuclear mass without electrons)Mass excess:-29.43521 MeVMass defect:1.665252468 u (per nucleus)Nuclear binding energy:1551.17268243 MeV (per nucleus)
7.91414634 MeV (average binding energy per nucleon)Separation energy:SN = 5.81(4) MeV (first neutron)
SP = 7.21(7) MeV (first proton)Half-life:52(1) sDecay constant λ:0.013329753472307 s-1Specific activity α:4.11659759171 × 10+19 Bq g-1
1112593943.707 Ci g-1Spin and parity:
(nuclear angular momentum)(0-)Year of discovery:1966
Radioactive Decay
Half-life T½ = 52(1) s respectively 5.2 × 101 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 196Pt | 100 % | 3.21(4) MeV | |
Parent Nuclides
Direct parent isotope is: 196Os.
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 |
|---|
| 196mIr | 410(11) keV | 1.40(2) h | (10,11-) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 119) and isobaric (same nucleon number A = 196) with Iridium-196. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 119 | Isobar A = 196 |
|---|
| 73 | 192Ta | |
| 74 | 193W | 196W |
| 75 | 194Re | 196Re |
| 76 | 195Os | 196Os |
| 77 | 196Ir | 196Ir |
| 78 | 197Pt | 196Pt |
| 79 | 198Au | 196Au |
| 80 | 199Hg | 196Hg |
| 81 | 200Tl | 196Tl |
| 82 | 201Pb | 196Pb |
| 83 | 202Bi | 196Bi |
| 84 | 203Po | 196Po |
| 85 | 204At | 196At |
| 86 | 205Rn | 196Rn |
| 87 | 206Fr | |
| 88 | 207Ra | |
| 89 | 208Ac | |
| 90 | 209Th | |
| 91 | 210Pa | |
External data and identifiers
Last update: 2020-10-21
Perma link: https://www.chemlin.org/isotope/iridium-196
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