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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.

See also: list of Bismuth isotopes.

 

General data

Name of the isotope:Bismuth-214; Bi-214Namen:Radium CSymbol:214BiMass number A:214Atomic 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:19.9(4) minDecay constant λ:0.00058052527685088 s-1Spin and parity:1-Year of discovery:1904

 

Radioactive Decay

Half-life T½ = 19.9(4) min (minutes) respectively 1.194 × 103 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
β-214Po99,979(1) %3,269(11) MeV
α210Tl0,021(1) %5,621(3) MeV

 

Bismuth-214 radioactive decay

 

Parent Nuclides

Direct parent isotopes are: 218At, 214Pb.

 

Radiation Protection

The German Radiation Protection Ordinance, for example, specifies the following limit values for the isotope Bismuth-214 (exemption limits, clearance values and other values as a radioactive or highly radioactive source of radiation (HASS)):

Isotope:Bi-214+Exemption level:105 BqExemption level per gram:10 Bq/g
Unrestricted handling of solids and liquids.
Half-life:19.9 min

 

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.

 

OZIsotone N = 131Isobar A = 214
79210Au
80211Hg214Hg
81212Tl214Tl
82213Pb214Pb
83214Bi214Bi
84215Po214Po
85216At214At
86217Rn214Rn
87218Fr214Fr
88219Ra214Ra
89220Ac214Ac
90221Th214Th
91222Pa214Pa
92223U

 

External data and identifiers

CAS:14733-03-0InChI Key:JCXGWMGPZLAOME-BKFZFHPZSA-NSMILES:[214Bi]PubChem:ID 6328549Adopted Levels, Gammas:NuDat 214Bi

 


Category: Isotopes

Last update: 26.11.2022



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