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Radionuclide Dosimetric Data Sheets
Protactinium-230
Summary data
General
Classification
Isotope: Pa-230
Atomic number (Z): 91
Mass number (A): 230
Neutron number (N): 139
Radioactive decay
Decay modes: α, β-, Electron capture
Half-life: 17.4 [d]
Decay constant: 4.6107e-07 [1/s]
Daughters: Th-230 (91.6%), U-230 (8.4%), Ac-226 (0.0032%)
Radioactive daughters: Th-230, U-230, Ac-226
Dosimetric constants
Mean alpha energy: 0.0001 [MeV]
Mean electron energy: 0.06679 [MeV]
Mean photon energy: 0.67077 [MeV]
Air kerma rate constant, Γ10: 3.985e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.985e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.072e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 1.602e-17
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
1.070e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.075e-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/Pa-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/Pa-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/Pa-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/Pa-230 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.55226e-05 |
8.505e-01 |
X-ray |
|
8.22669e-05 |
1.689e+01 |
X-ray |
|
3.06425e-03 |
9.354e-02 |
X-ray |
|
1.11571e-02 |
1.452e-02 |
X-ray |
|
1.28126e-02 |
2.419e-02 |
X-ray |
|
1.29764e-02 |
2.126e-01 |
X-ray |
|
1.36268e-02 |
1.095e-02 |
X-ray |
|
1.56384e-02 |
4.393e-02 |
X-ray |
|
1.56464e-02 |
1.040e-02 |
X-ray |
|
1.62776e-02 |
1.705e-01 |
X-ray |
|
1.73072e-02 |
1.160e-02 |
X-ray |
|
1.90652e-02 |
3.789e-02 |
X-ray |
|
9.03299e-02 |
1.879e-01 |
X-ray |
|
9.37949e-02 |
3.038e-01 |
X-ray |
|
1.05278e-01 |
3.482e-02 |
X-ray |
|
1.06073e-01 |
6.792e-02 |
X-ray |
|
1.09154e-01 |
1.736e-02 |
X-ray |
|
3.97700e-01 |
1.869e-02 |
Gamma |
|
4.43750e-01 |
5.496e-02 |
Gamma |
|
4.54950e-01 |
6.265e-02 |
Gamma |
|
5.08200e-01 |
3.572e-02 |
Gamma |
|
5.18500e-01 |
1.979e-02 |
Gamma |
|
5.71100e-01 |
1.083e-02 |
Gamma |
|
7.28200e-01 |
1.896e-02 |
Gamma |
|
7.81350e-01 |
1.484e-02 |
Gamma |
|
8.98680e-01 |
5.826e-02 |
Gamma |
|
9.18480e-01 |
8.244e-02 |
Gamma |
|
9.51950e-01 |
2.913e-01 |
Gamma |
|
9.56400e-01 |
1.594e-02 |
Gamma |
|
1.00960e+00 |
1.083e-02 |
Gamma |
|
1.02605e+00 |
1.462e-02 |
Gamma |
|
1.50340e-01 |
8.169e-02 |
Beta |
|
5.13382e-05 |
4.069e+00 |
Auger electron |
|
7.21845e-05 |
2.290e-01 |
Auger electron |
|
1.32742e-04 |
4.498e+00 |
Auger electron |
|
1.50449e-04 |
2.588e-02 |
Auger electron |
|
1.86374e-04 |
2.243e-01 |
Auger electron |
|
1.88080e-04 |
2.557e+00 |
Auger electron |
|
1.92476e-04 |
1.289e-01 |
Auger electron |
|
4.96930e-04 |
6.668e-01 |
Auger electron |
|
5.40221e-04 |
3.303e-02 |
Auger electron |
|
1.48198e-03 |
2.202e-01 |
Auger electron |
|
2.31771e-03 |
1.469e+00 |
Auger electron |
|
2.44399e-03 |
7.398e-02 |
Auger electron |
|
2.73232e-03 |
2.524e-01 |
Auger electron |
|
2.91674e-03 |
1.392e-02 |
Auger electron |
|
3.31197e-03 |
1.467e-02 |
Auger electron |
|
9.79469e-03 |
3.858e-01 |
Auger electron |
|
1.02808e-02 |
1.857e-02 |
Auger electron |
|
1.29227e-02 |
1.921e-01 |
Auger electron |
|
1.60851e-02 |
2.257e-02 |
Auger electron |
|
3.06760e-02 |
3.218e-02 |
Conversion electron |
|
3.34200e-02 |
2.169e-01 |
Conversion electron |
|
3.45380e-02 |
2.737e-02 |
Conversion electron |
|
3.68850e-02 |
1.882e-01 |
Conversion electron |
|
4.74304e-02 |
1.682e-02 |
Conversion electron |
|
4.91638e-02 |
1.132e-01 |
Conversion electron |
|
5.32000e-02 |
3.910e-02 |
Conversion electron |
|
7.18676e-02 |
1.349e-02 |
Auger electron |
|
3.33640e-01 |
1.065e-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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