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Lead-214

Properties and data of the isotope 214Pb.


Contents

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-1
Spin 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
DaughterProbabilityDecay energyγ energy
(intensity)
β-214Bi100 %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 IsomerExcitation EnergyHalf-lifeSpin
214mPb1365+x keV6.2(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.

 

ZIsotone N = 132Isobar A = 214
80212Hg214Hg
81213Tl214Tl
82214Pb214Pb
83215Bi214Bi
84216Po214Po
85217At214At
86218Rn214Rn
87219Fr214Fr
88220Ra214Ra
89221Ac214Ac
90222Th214Th
91223Pa214Pa
92224U214U
93225Np

 

External data and identifiers

CAS:15067-28-4InChI Key:WABPQHHGFIMREM-RKEGKUSMSA-NSMILES:[214Pb]PubChem:ID 6328551Adopted Levels, Gammas:NuDat 214Pb

 


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Last update: 2023-05-18


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