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Radionuclide Dosimetric Data Sheets

Bismuth-202

Summary data

General

Classification

Isotope:  Bi-202
Atomic number (Z):  83
Mass number (A):  202
Neutron number (N):  119

Radioactive decay

Decay modes:  β+, Electron capture
Half-life:  1.72 [h]
Decay constant:  1.1194e-04 [1/s]
Daughters:  Pb-202 (100.0%)
Radioactive daughters:  Pb-202

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.15146 [MeV]
Mean photon energy:  2.75612 [MeV]
Air kerma rate constant, Γ10:  1.113e-16 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  1.143e-16 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  2.427e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα:  0.000e+00 [Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:  2.427e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  4.416e-13 [Gy·kg/Bq·s]

Dose point kernels (plot)

Dose point kernel source:  Graves, et al. Medical Physics. 2019 Nov.; 46(11):5284-5293.

Note: Bins are spaced every 0.1 mm until a radius of 10 cm, and every 1 mm until a radius of 2 m.

Download tabulated dose point kernel file here:  www.mirdsoft.org/products/MIRDspecs/Bi-202 DPK.csv

Summary spectra (plot)

Spectra source:  ICRP Publication 107: Nuclear Decay Data for Dosimetric Calculations. Ann. ICRP 2008, 38 (3).

Download tabulated summary spectra file here:  www.mirdsoft.org/products/MIRDspecs/Bi-202 Summary Spectrum.csv

Beta spectra (plot)

Spectra source:  ICRP Publication 107: Nuclear Decay Data for Dosimetric Calculations. Ann. ICRP 2008, 38 (3).

Download tabulated beta spectra file here:  www.mirdsoft.org/products/MIRDspecs/Bi-202 Beta Spectrum.csv

 

Tabulated data

Summary spectra (table)

Spectra source:  ICRP Publication 107: Nuclear Decay Data for Dosimetric Calculations. Ann. ICRP 2008, 38 (3).

Note: Radiations with yield < 0.01 are excluded from the table, but are available in the linked *.csv data.

Download tabulated summary spectra file here:  www.mirdsoft.org/products/MIRDspecs/Bi-202 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

2.66207e-05

1.462e+01

X-ray

2.37971e-03

5.508e-02

X-ray

1.04453e-02

1.745e-02

X-ray

1.05510e-02

1.537e-01

X-ray

1.26275e-02

2.957e-02

X-ray

1.26563e-02

9.897e-02

X-ray

1.48158e-02

2.021e-02

X-ray

7.30390e-02

2.552e-01

X-ray

7.52501e-02

4.286e-01

X-ray

8.47407e-02

4.775e-02

X-ray

8.52354e-02

9.249e-02

X-ray

8.75343e-02

1.139e-02

X-ray

8.76558e-02

2.238e-02

X-ray

1.25210e-01

1.191e-02

Gamma

1.68110e-01

4.765e-02

Gamma

2.40180e-01

4.467e-02

Gamma

2.48920e-01

3.068e-02

Gamma

3.20140e-01

3.117e-02

Gamma

3.46470e-01

4.567e-02

Gamma

4.22130e-01

8.369e-01

Gamma

4.38220e-01

1.549e-02

Gamma

5.11000e-01

1.545e-01

Annihilation photon

5.14420e-01

1.618e-02

Gamma

5.69270e-01

4.765e-02

Gamma

5.78560e-01

7.347e-02

Gamma

6.57490e-01

6.056e-01

Gamma

6.62550e-01

1.310e-02

Gamma

6.76190e-01

1.886e-02

Gamma

8.52570e-01

2.283e-02

Gamma

8.58420e-01

1.638e-02

Gamma

8.76210e-01

1.062e-02

Gamma

9.27280e-01

7.148e-02

Gamma

9.42070e-01

1.191e-02

Gamma

9.54470e-01

7.843e-02

Gamma

9.60670e-01

9.928e-01

Gamma

1.22420e+00

1.559e-02

Gamma

1.24548e+00

2.790e-02

Gamma

1.55669e+00

1.886e-02

Gamma

9.67886e-01

1.214e-02

Positron

1.26019e+00

2.327e-02

Positron

4.21756e-05

3.285e+00

Auger electron

8.23123e-05

4.733e+00

Auger electron

1.73834e-04

2.495e+00

Auger electron

4.22612e-04

5.560e-01

Auger electron

9.53456e-04

1.816e-01

Auger electron

1.91044e-03

1.330e+00

Auger electron

2.17079e-03

1.658e-01

Auger electron

8.04802e-03

3.910e-01

Auger electron

9.29001e-03

2.069e-02

Conversion electron

1.04239e-02

1.730e-01

Auger electron

1.28274e-02

1.833e-02

Auger electron

5.87487e-02

2.162e-02

Auger electron

6.49030e-02

1.775e-02

Conversion electron

7.07077e-02

1.182e-02

Auger electron

7.98200e-02

1.186e-02

Conversion electron

1.51890e-01

2.684e-02

Conversion electron

1.52859e-01

1.103e-02

Conversion electron

1.60630e-01

1.888e-02

Conversion electron

2.58180e-01

1.137e-02

Conversion electron

3.33840e-01

2.522e-02

Conversion electron

 

Useful Links

Isotope decay characteristics are periodically updated as better measurements can be made - changes that may not be reflected on this page. Please see useful links:

National Nuclear Data Center (NNDC):  https://www.nndc.bnl.gov/nudat3/mird/

International Atomic Energy Agency (IAEA) Livechart:  https://www-nds.iaea.org/relnsd/vcharthtml/VChartHTML.html

Reference Links

ICRP Report 107: https://www.icrp.org/publication.asp?id=ICRP%20Publication%20107

Graves et al. Dose Point Kernels: https://doi.org/10.1002/mp.13789

MIRD Decay Schemes 2nd Edition: https://sites.snmmi.org/SNMMI-MAIN/iCore/Store/StoreLayouts/Item_Detail.aspx?iProductCode=0-932004-80-6

 

 

 

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