Bismuth-214
Properties and data of the isotope 214Bi.
Bismuth-214 is the radioisotope of the element Bismuth, whose atomic nucleus has 131 neutrons in addition to the element-specific 83 protons, resulting in a mass number of 214: 214 Bi.
The isotope 214Bi occurs, among other things, in the decay chain of radium-226; At the time of its discovery it was therefore initially referred to as radium C.
See also: list of Bismuth isotopes.
General data
Name of the isotope:Bismuth-214; Bi-214Other names:Radium CSymbol:214Bi or 21483BiMass number A:214 (= number of nucleons)Atomic number Z:83 (= number of protons)Neutrons N:131Isotopic mass:213.998711(12) u (atomic weight of Bismuth-214)Nuclide mass:213.9531841 u (calculated nuclear mass without electrons)Mass excess:-1.2007 MeVMass defect:1.785870652 u (per nucleus)Nuclear binding energy:1663.52779711 MeV (per nucleus)
7.77349438 MeV (average binding energy per nucleon)Separation energy:SN = 4.040(12) MeV (first neutron)
SP = 5.286(13) MeV (first proton)Half-life:19.71(2) minDecay constant λ:0.00058612141092503 s-1Specific activity α:1.657138825171 × 10+18 Bq g-1
44787535.815449 Ci g-1Spin and parity:
(nuclear angular momentum)1-Year of discovery:1904
Radioactive Decay
Half-life T½ = 19.71(2) min (minutes) respectively 1.1826 × 103 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 214Po | 99.9790(13) % | 3.269(11) MeV | |
| α | 210Tl | 0.0210(13) % | 5.621(3) MeV | |
| β-, α | 210Pb | 0.003 % | | |
Parent Nuclides
Direct parent isotopes are: 218At, 214Pb.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 131) and isobaric (same nucleon number A = 214) with Bismuth-214. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 131 | Isobar A = 214 |
|---|
| 79 | 210Au | |
| 80 | 211Hg | 214Hg |
| 81 | 212Tl | 214Tl |
| 82 | 213Pb | 214Pb |
| 83 | 214Bi | 214Bi |
| 84 | 215Po | 214Po |
| 85 | 216At | 214At |
| 86 | 217Rn | 214Rn |
| 87 | 218Fr | 214Fr |
| 88 | 219Ra | 214Ra |
| 89 | 220Ac | 214Ac |
| 90 | 221Th | 214Th |
| 91 | 222Pa | 214Pa |
| 92 | 223U | 214U |
External data and identifiers
CAS:14733-03-0InChI Key:JCXGWMGPZLAOME-BKFZFHPZSA-NSMILES:[214Bi]PubChem:ID 6328549Adopted Levels, Gammas:NuDat 214Bi
Literature and References
[1] - B. Andel et al.:
New β-decaying state in 214Bi.
In: Physical Review C, 104, 054301, (2021), DOI 10.1103/PhysRevC.104.054301.
Last update: 2023-11-19
Perma link: https://www.chemlin.org/isotope/bismuth-214
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