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Radionuclide Dosimetric Data Sheets
Astatine-216
Summary data
General
Classification
Isotope: At-216
Atomic number (Z): 85
Mass number (A): 216
Neutron number (N): 131
Radioactive decay
Decay modes: α
Half-life: 0.0003 [s]
Decay constant: 2.3105e+03 [1/s]
Daughters: Bi-212 (100.0%)
Radioactive daughters: Bi-212
Dosimetric constants
Mean alpha energy: 7.9406 [MeV]
Mean electron energy: 0.00134 [MeV]
Mean photon energy: 0.00251 [MeV]
Air kerma rate constant, Γ10: 3.650e-19 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.650e-19 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.272e-12 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 1.272e-12
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
2.147e-16 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.021e-16
[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/At-216 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/At-216 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/At-216 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
3.24801e-05 |
2.671e-01 |
X-ray |
|
4.07273e-05 |
6.216e-02 |
Auger electron |
|
8.93989e-05 |
8.496e-02 |
Auger electron |
|
1.73627e-04 |
4.524e-02 |
Auger electron |
|
4.25309e-04 |
1.021e-02 |
Auger electron |
|
1.96161e-03 |
2.436e-02 |
Auger electron |
|
2.43680e-02 |
1.655e-02 |
Conversion electron |
|
7.68708e+00 |
2.092e-02 |
Alpha |
|
7.80013e+00 |
9.664e-01 |
Alpha |
|
1.45134e-01 |
2.092e-02 |
Alpha recoil |
|
1.47268e-01 |
9.664e-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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