About   |   More   |   Search
ChemLin Logo

Bismuth-206

Properties and data of the isotope 206Bi.


Contents

See also: list of Bismuth isotopes.

 

General data

Name of the isotope:Bismuth-206; Bi-206Symbol:206Bi or 20683BiMass number A:206 (= number of nucleons)Atomic number Z:83 (= number of protons)Neutrons N:123Isotopic mass:205.978499(8) u (atomic weight of Bismuth-206)Nuclide mass:205.9329721 u (calculated nuclear mass without electrons)Mass excess:-20.02805 MeVMass defect:1.736763324 u (per nucleus)Nuclear binding energy:1617.78461573 MeV (per nucleus)
7.85332338 MeV (average binding energy per nucleon)
Separation energy:SN = 7.035(9) MeV (first neutron)
SP = 3.547(8) MeV (first proton)
Half-life:6.243(3) dDecay constant λ:1.285045140483 × 10-6 s-1Specific activity α:3.774986754813 × 10+15 Bq g-1
102026.669049 Ci g-1
Spin and parity:
(nuclear angular momentum)
6+Magnetic dipole moment:μ(μN) = + 4.361(8)Quadrupole moment Q:-0.39(4) barn (100 fm2)Nuclear g-factor:gl = 0.72683333333333Charge radius:5.5034(909) femtometer fmYear of discovery:1947

 

Radioactive Decay

Half-life T½ = 6.243(3) d respectively 5.393952 × 105 seconds s.

Decay
mode
DaughterProbabilityDecay energyγ energy
(intensity)
EC/β+206Pb100 %3.757(8) MeV

 

Parent Nuclides

Direct parent isotopes are: 210At, 206Po.

 

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear IsomerExcitation EnergyHalf-lifeSpin
206mBi1044.8(7) keV0.89(1) ms10-

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 123) and isobaric (same nucleon number A = 206) with Bismuth-206. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 123Isobar A = 206
74197W
75198Re
76199Os
77200Ir
78201Pt206Pt
79202Au206Au
80203Hg206Hg
81204Tl206Tl
82205Pb206Pb
83206Bi206Bi
84207Po206Po
85208At206At
86209Rn206Rn
87210Fr206Fr
88211Ra206Ra
89212Ac206Ac
90213Th
91214Pa
92215U

 

External data and identifiers

Adopted Levels, Gammas:NuDat 206Bi

 


More Chemistry

isotopes

Social Media

Facebook

LinkedIn

Twitter


Last update: 2020-10-23


© 1996 - 2025 ChemLin