Polonium-192
Properties and data of the isotope 192Po.
See also: list of Polonium isotopes.
General data
Name of the isotope:Polonium-192; Po-192Symbol:192Po or 19284PoMass number A:192 (= number of nucleons)Atomic number Z:84 (= number of protons)Neutrons N:108Isotopic mass:191.991336(12) u (atomic weight of Polonium-192)Nuclide mass:191.9452607 u (calculated nuclear mass without electrons)Mass excess:-8.07046 MeVMass defect:1.601777616 u (per nucleus)Nuclear binding energy:1492.04623864 MeV (per nucleus)
7.77107416 MeV (average binding energy per nucleon)Separation energy:SN = 11.073(13) MeV (first neutron)
SP = 2.120(13) MeV (first proton)Half-life:32.2(3) msDecay constant λ:21.526309955278 s-1Specific activity α:6.787145065201 × 10+22 Bq g-1
1834363531135.4 Ci g-1Spin and parity:
(nuclear angular momentum)0+Charge radius:5.5220(178) femtometer fmYear of discovery:1977
Radioactive Decay
Half-life T½ = 32.2(3) ms respectively 3.22 × 10-2 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
α | 188Pb | ca. 99.5 % | 7.230(3) MeV | |
EE/β+ | 192Bi | ca. 0.5 % | 5.46(3) MeV | |
Parent Nuclides
Direct parent isotope is: 196Rn.
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 |
---|
192mPo | 2294.6 keV | 0.58(10) μs | (11-) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 108) and isobaric (same nucleon number A = 192) with Polonium-192. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 108 | Isobar A = 192 |
66 | 174Dy | |
67 | 175Ho | |
68 | 176Er | |
69 | 177Tm | |
70 | 178Yb | |
71 | 179Lu | |
72 | 180Hf | |
73 | 181Ta | 192Ta |
74 | 182W | 192W |
75 | 183Re | 192Re |
76 | 184Os | 192Os |
77 | 185Ir | 192Ir |
78 | 186Pt | 192Pt |
79 | 187Au | 192Au |
80 | 188Hg | 192Hg |
81 | 189Tl | 192Tl |
82 | 190Pb | 192Pb |
83 | 191Bi | 192Bi |
84 | 192Po | 192Po |
85 | 193At | 192At |
86 | 194Rn | |
External data and identifiers
Last update: 2020-10-07
Perma link: https://www.chemlin.org/isotope/polonium-192
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