Lead-192m2
Properties and data of the isotope 192m2Pb.
See also: List of individual Lead isotopes (and general data sources).
General data
Name of the isotope:Lead-192m2; Pb-192m2Symbol:192m2Pb or 192m282PbMass number A:192 (= number of nucleons)Atomic number Z:82 (= number of protons)Neutrons N:110Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.3414634146341 (= neutron-proton ratio)Neutron excess (N-Z):28Excitation energy:2624.0(8) keVIsotopic mass:191.975785(14) u (atomic weight of Lead-192m2)Nuclide mass:191.9308066 u (calculated nuclear mass without electrons)Mass excess:-22.55613 MeVMass defect:1.619008384 u (per nucleus)Nuclear binding energy:1508.09659565 MeV (per nucleus)
7.85466977 MeV (average binding energy per nucleon)Half-life:1.09(4) μsDecay constant λ:635914.84455041 s-1Specific activity α:2.005009826600 × 10+27 Bq g-1
5.418945477299 × 10+16 Ci g-1Spin and parity:
(nuclear angular momentum)(12+)Magnetic dipole moment:μ(μN) = -2.076(24)Quadrupole moment Q:0.32(4) barn (100 fm2)Nuclear g-factor:gl = -0.173
Radioactive Decay
Half-life T½ = 1.09(4) μs respectively 1.09 × 10-6 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| Iso | 192Pb | 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 |
|---|
| 192Pb | | 3.5(1) min | 0+ |
| 192m1Pb | 2581.1(4) keV | 166(6) ns | (10)+ |
| 192m3Pb | 2743.5(4) keV | 0.756(14) μs | (11)- |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 110) and isobaric (same nucleon number A = 192) with Lead-192m2. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 110 | Isobar A = 192 |
|---|
| 69 | 179Tm | |
| 70 | 180Yb | |
| 71 | 181Lu | |
| 72 | 182Hf | |
| 73 | 183Ta | 192Ta |
| 74 | 184W | 192W |
| 75 | 185Re | 192Re |
| 76 | 186Os | 192Os |
| 77 | 187Ir | 192Ir |
| 78 | 188Pt | 192Pt |
| 79 | 189Au | 192Au |
| 80 | 190Hg | 192Hg |
| 81 | 191Tl | 192Tl |
| 82 | 192Pb | 192Pb |
| 83 | 193Bi | 192Bi |
| 84 | 194Po | 192Po |
| 85 | 195At | 192At |
| 86 | 196Rn | |
External data and identifiers
Last update: 2020-10-22
Perma link: https://www.chemlin.org/isotope/lead-192m2
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