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Radionuclide Dosimetric Data Sheets
Actinium-230
Summary data
General
Classification
Isotope: Ac-230
Atomic number (Z): 89
Mass number (A): 230
Neutron number (N): 141
Radioactive decay
Decay modes: β-
Half-life: 122.0 [s]
Decay constant: 5.6815e-03 [1/s]
Daughters: Th-230 (100.0%)
Radioactive daughters: Th-230
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.92285 [MeV]
Mean photon energy: 0.54396 [MeV]
Air kerma rate constant, Γ10: 2.278e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.278e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.479e-13 [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-:
1.479e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 8.715e-14
[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/Ac-230 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/Ac-230 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/Ac-230 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/Ac-230 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
8.23159e-05 |
5.088e+00 |
X-ray |
|
3.07049e-03 |
2.817e-02 |
X-ray |
|
1.29764e-02 |
5.909e-02 |
X-ray |
|
1.56384e-02 |
1.221e-02 |
X-ray |
|
1.62776e-02 |
7.113e-02 |
X-ray |
|
1.90652e-02 |
1.581e-02 |
X-ray |
|
4.54900e-01 |
8.200e-02 |
Gamma |
|
5.08200e-01 |
5.150e-02 |
Gamma |
|
1.24390e+00 |
3.501e-02 |
Gamma |
|
1.34770e+00 |
1.566e-02 |
Gamma |
|
1.37540e+00 |
1.214e-02 |
Gamma |
|
1.77530e+00 |
1.115e-02 |
Gamma |
|
1.94980e+00 |
1.255e-02 |
Gamma |
|
3.19202e-01 |
1.787e-02 |
Beta |
|
3.71337e-01 |
1.588e-02 |
Beta |
|
3.84813e-01 |
2.184e-02 |
Beta |
|
5.30299e-01 |
3.376e-02 |
Beta |
|
5.40441e-01 |
2.482e-02 |
Beta |
|
5.71547e-01 |
3.971e-02 |
Beta |
|
7.10761e-01 |
1.092e-02 |
Beta |
|
8.40722e-01 |
1.191e-02 |
Beta |
|
8.93086e-01 |
9.928e-02 |
Beta |
|
1.08242e+00 |
1.986e-01 |
Beta |
|
1.10467e+00 |
3.971e-01 |
Beta |
|
5.13384e-05 |
1.225e+00 |
Auger electron |
|
1.33135e-04 |
1.356e+00 |
Auger electron |
|
1.88122e-04 |
7.773e-01 |
Auger electron |
|
4.97839e-04 |
1.991e-01 |
Auger electron |
|
1.74770e-03 |
3.366e-02 |
Auger electron |
|
2.32635e-03 |
4.414e-01 |
Auger electron |
|
2.74386e-03 |
7.609e-02 |
Auger electron |
|
9.94719e-03 |
1.174e-01 |
Auger electron |
|
1.30825e-02 |
5.854e-02 |
Auger electron |
|
3.34200e-02 |
1.765e-01 |
Conversion electron |
|
3.68850e-02 |
1.532e-01 |
Conversion electron |
|
4.91638e-02 |
9.215e-02 |
Conversion electron |
|
5.32000e-02 |
3.182e-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
MIRDsoft MIRDspecs version 20250101 (www.mirdsoft.org)
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