Bismuth-220
Properties and data of the isotope 220Bi.
See also: list of Bismuth isotopes.
General data
Name of the isotope:Bismuth-220; Bi-220Symbol:220Bi or 22083BiMass number A:220 (= number of nucleons)Atomic number Z:83 (= number of protons)Neutrons N:137Isotopic mass:220.02235(32) u (atomic weight of Bismuth-220)Nuclide mass:219.9768231 u (calculated nuclear mass without electrons)Mass excess:20.81889 MeVMass defect:1.814221148 u (per nucleus)Nuclear binding energy:1689.93611404 MeV (per nucleus)
7.68152779 MeV (average binding energy per nucleon)Separation energy:SN = 3.53(36) MeV (first neutron)
SP = 6.75(50) MeV (first proton)Half-life:300 nsDecay constant λ:2310490.6018665 s-1Specific activity α:6.324590845454 × 10+27 Bq g-1
1.709348877149 × 10+17 Ci g-1Spin and parity:
(nuclear angular momentum)Year of discovery:2009
Radioactive Decay
Half-life T½ = 300 ns respectively 3.0 × 10-7 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 220Po | ? | 5.55(30) MeV | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 137) and isobaric (same nucleon number A = 220) with Bismuth-220. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 137 | Isobar A = 220 |
|---|
| 82 | 219Pb | 220Pb |
| 83 | 220Bi | 220Bi |
| 84 | 221Po | 220Po |
| 85 | 222At | 220At |
| 86 | 223Rn | 220Rn |
| 87 | 224Fr | 220Fr |
| 88 | 225Ra | 220Ra |
| 89 | 226Ac | 220Ac |
| 90 | 227Th | 220Th |
| 91 | 228Pa | 220Pa |
| 92 | 229U | 220U |
| 93 | 230Np | |
| 94 | 231Pu | |
| 95 | 232Am | |
| 96 | 233Cm | |
| 97 | 234Bk | |
External data and identifiers
Literature and References
[1] - H. Alvarez-Pol, J. Benlliure, E. Casarejos, L. Audouin et al.:
Production cross-sections of neutron-rich Pb and Bi isotopes in the fragmentation of 238U.
In: Experimental Physics, (2009), DOI 10.1140/epja/i2009-10856-8.
Last update: 2020-10-23
Perma link: https://www.chemlin.org/isotope/bismuth-220
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