Lead-196m4
Properties and data of the isotope 196m4Pb.
See also: List of individual Lead isotopes (and general data sources).
General data
Name of the isotope:Lead-196m4; Pb-196m4Symbol:196m4Pb or 196m482PbMass number A:196 (= number of nucleons)Atomic number Z:82 (= number of protons)Neutrons N:114Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.390243902439 (= neutron-proton ratio)Neutron excess (N-Z):32Excitation energy:2694.12(19) keVIsotopic mass:195.972787(8) u (atomic weight of Lead-196m4)Nuclide mass:195.9278086 u (calculated nuclear mass without electrons)Mass excess:-25.34875 MeVMass defect:1.656666048 u (per nucleus)Nuclear binding energy:1543.17448372 MeV (per nucleus)
7.8733392 MeV (average binding energy per nucleon)Half-life:270(4) nsDecay constant λ:2567211.7798516 s-1Specific activity α:7.9282620284 × 10+27 Bq g-1
2.142773521213 × 10+17 Ci g-1Spin and parity:
(nuclear angular momentum)12+Magnetic dipole moment:μ(μN) = -1.920(18)Quadrupole moment Q:0.65(5) barn (100 fm2)Nuclear g-factor:gl = -0.16
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 |
|---|
| 196Pb | | 37(3) min | 0+ |
| 196m1Pb | 1049.20(9) keV | < 100 ns | 2+ |
| 196m2Pb | 1738.27(12) keV | 1 μs | 4+ |
| 196m3Pb | 1797.51(14) keV | 140(14) ns | 5- |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 114) and isobaric (same nucleon number A = 196) with Lead-196m4. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 114 | Isobar A = 196 |
|---|
| 70 | 184Yb | |
| 71 | 185Lu | |
| 72 | 186Hf | |
| 73 | 187Ta | |
| 74 | 188W | 196W |
| 75 | 189Re | 196Re |
| 76 | 190Os | 196Os |
| 77 | 191Ir | 196Ir |
| 78 | 192Pt | 196Pt |
| 79 | 193Au | 196Au |
| 80 | 194Hg | 196Hg |
| 81 | 195Tl | 196Tl |
| 82 | 196Pb | 196Pb |
| 83 | 197Bi | 196Bi |
| 84 | 198Po | 196Po |
| 85 | 199At | 196At |
| 86 | 200Rn | 196Rn |
| 87 | 201Fr | |
| 88 | 202Ra | |
| 89 | 203Ac | |
External data and identifiers
Last update: 2020-10-22
Perma link: https://www.chemlin.org/isotope/lead-196m4
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