Lead-214
Properties and data of the isotope 214Pb.
See also: list of Lead isotopes.
General data
Name of the isotope:Lead-214; Pb-214Other names:Radium BSymbol:214Pb or 21482PbMass number A:214 (= number of nucleons)Atomic number Z:82 (= number of protons)Neutrons N:132Isotopic mass:213.9998035(21) u (atomic weight of Lead-214)Nuclide mass:213.9548251 u (calculated nuclear mass without electrons)Mass excess:-0.18304 MeVMass defect:1.785618036 u (per nucleus)Nuclear binding energy:1663.29248683 MeV (per nucleus)
7.7723948 MeV (average binding energy per nucleon)Separation energy:SN = 5.051(7) MeV (first neutron)
SP = 9.256(27) MeV (first proton)Half-life:27.06(7) minDecay constant λ:0.00042691991904407 s-1Specific activity α:1.20702905558 × 10+18 Bq g-1
32622406.907703 Ci g-1Spin and parity:
(nuclear angular momentum)0+Charge radius:5. 5577(23) femtometer fmYear of discovery:1904
Radioactive Decay
Half-life T½ = 27.06(7) min (minutes) respectively 1.6236 × 103 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β- | 214Bi | 100 % | 1.018(11) MeV | |
Parent Nuclides
Direct parent isotope is: 218Po.
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 |
---|
214mPb | 1365+x keV | 6.2(3) μs | (8+) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 132) and isobaric (same nucleon number A = 214) with Lead-214. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 132 | Isobar A = 214 |
80 | 212Hg | 214Hg |
81 | 213Tl | 214Tl |
82 | 214Pb | 214Pb |
83 | 215Bi | 214Bi |
84 | 216Po | 214Po |
85 | 217At | 214At |
86 | 218Rn | 214Rn |
87 | 219Fr | 214Fr |
88 | 220Ra | 214Ra |
89 | 221Ac | 214Ac |
90 | 222Th | 214Th |
91 | 223Pa | 214Pa |
92 | 224U | 214U |
93 | 225Np | |
External data and identifiers
CAS:15067-28-4InChI Key:WABPQHHGFIMREM-RKEGKUSMSA-NSMILES:[214Pb]PubChem:ID 6328551Adopted Levels, Gammas:NuDat 214Pb
Last update: 2023-05-18
Perma link: https://www.chemlin.org/isotope/lead-214
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