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Radionuclide Dosimetric Data Sheets
Radon-210
Summary data
General
Classification
Isotope: Rn-210
Atomic number (Z): 86
Mass number (A): 210
Neutron number (N): 124
Radioactive decay
Decay modes: α, Electron capture
Half-life: 2.4 [h]
Decay constant: 8.0225e-05 [1/s]
Daughters: Po-206 (96.0%), At-210 (4.0%)
Radioactive daughters: Po-206, At-210
Dosimetric constants
Mean alpha energy: 5.9121 [MeV]
Mean electron energy: 0.00906 [MeV]
Mean photon energy: 0.06095 [MeV]
Air kerma rate constant, Γ10: 3.412e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.412e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 9.487e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 9.472e-13
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
1.452e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 9.765e-15
[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/Rn-210 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/Rn-210 Summary 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/Rn-210 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
4.42741e-05 |
1.332e+00 |
X-ray |
|
1.14288e-02 |
1.414e-02 |
X-ray |
|
7.92282e-02 |
1.409e-02 |
X-ray |
|
8.18531e-02 |
2.334e-02 |
X-ray |
|
4.58250e-01 |
1.700e-02 |
Gamma |
|
3.80189e-05 |
3.313e-01 |
Auger electron |
|
1.05480e-04 |
4.037e-01 |
Auger electron |
|
1.76958e-04 |
2.187e-01 |
Auger electron |
|
4.60193e-04 |
5.337e-02 |
Auger electron |
|
1.03873e-03 |
3.081e-02 |
Auger electron |
|
2.06452e-03 |
1.192e-01 |
Auger electron |
|
2.37556e-03 |
1.709e-02 |
Auger electron |
|
8.70199e-03 |
3.138e-02 |
Auger electron |
|
1.13515e-02 |
1.456e-02 |
Auger electron |
|
5.52270e-02 |
2.520e-02 |
Conversion electron |
|
6.04112e+00 |
9.599e-01 |
Alpha |
|
1.17380e-01 |
9.599e-01 |
Alpha recoil |
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
MIRDsoft MIRDspecs version 20250101 (www.mirdsoft.org)
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