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Radionuclide Dosimetric Data Sheets
Protactinium-234
Summary data
General
Classification
Isotope: Pa-234
Atomic number (Z): 91
Mass number (A): 234
Neutron number (N): 143
Radioactive decay
Decay modes: β-
Half-life: 6.7 [h]
Decay constant: 2.8737e-05 [1/s]
Daughters: U-234 (100.0%)
Radioactive daughters: U-234
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.40371 [MeV]
Mean photon energy: 1.47182 [MeV]
Air kerma rate constant, Γ10: 7.426e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 7.426e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 6.468e-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-:
6.468e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.358e-13
[Gy·kg/Bq·s]
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-234 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-234 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-234 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.55037e-05 |
2.551e+01 |
X-ray |
|
3.25735e-03 |
1.555e-01 |
X-ray |
|
1.16607e-02 |
2.333e-02 |
X-ray |
|
1.34452e-02 |
3.802e-02 |
X-ray |
|
1.36268e-02 |
3.341e-01 |
X-ray |
|
1.64468e-02 |
7.006e-02 |
X-ray |
|
1.65865e-02 |
1.036e-02 |
X-ray |
|
1.70780e-02 |
1.325e-02 |
X-ray |
|
1.73072e-02 |
3.055e-01 |
X-ray |
|
2.02658e-02 |
6.918e-02 |
X-ray |
|
2.09317e-02 |
1.340e-02 |
X-ray |
|
6.27000e-02 |
1.545e-02 |
Gamma |
|
9.50660e-02 |
1.401e-01 |
X-ray |
|
9.89281e-02 |
2.241e-01 |
X-ray |
|
9.98600e-02 |
3.193e-02 |
Gamma |
|
1.10929e-01 |
2.584e-02 |
X-ray |
|
1.11820e-01 |
5.055e-02 |
X-ray |
|
1.15080e-01 |
1.307e-02 |
X-ray |
|
1.31300e-01 |
1.802e-01 |
Gamma |
|
1.52710e-01 |
5.974e-02 |
Gamma |
|
1.86150e-01 |
1.761e-02 |
Gamma |
|
2.03120e-01 |
1.226e-02 |
Gamma |
|
2.26500e-01 |
4.223e-02 |
Gamma |
|
2.27250e-01 |
5.768e-02 |
Gamma |
|
2.49220e-01 |
2.472e-02 |
Gamma |
|
2.72280e-01 |
1.081e-02 |
Gamma |
|
2.93790e-01 |
2.987e-02 |
Gamma |
|
3.69500e-01 |
2.472e-02 |
Gamma |
|
3.72000e-01 |
1.215e-02 |
Gamma |
|
4.58680e-01 |
1.133e-02 |
Gamma |
|
5.06750e-01 |
1.287e-02 |
Gamma |
|
5.65200e-01 |
1.030e-02 |
Gamma |
|
5.68900e-01 |
3.605e-02 |
Gamma |
|
5.69500e-01 |
8.240e-02 |
Gamma |
|
6.66500e-01 |
1.164e-02 |
Gamma |
|
6.92600e-01 |
1.236e-02 |
Gamma |
|
6.99030e-01 |
3.605e-02 |
Gamma |
|
7.05900e-01 |
2.266e-02 |
Gamma |
|
7.33390e-01 |
6.901e-02 |
Gamma |
|
7.38000e-01 |
1.154e-02 |
Gamma |
|
7.42810e-01 |
2.060e-02 |
Gamma |
|
7.55000e-01 |
1.215e-02 |
Gamma |
|
7.86270e-01 |
1.195e-02 |
Gamma |
|
7.96100e-01 |
2.575e-02 |
Gamma |
|
8.05800e-01 |
2.524e-02 |
Gamma |
|
8.19200e-01 |
1.885e-02 |
Gamma |
|
8.24200e-01 |
1.236e-02 |
Gamma |
|
8.25100e-01 |
1.885e-02 |
Gamma |
|
8.31500e-01 |
4.120e-02 |
Gamma |
|
8.76000e-01 |
2.524e-02 |
Gamma |
|
8.80500e-01 |
6.180e-02 |
Gamma |
|
8.80500e-01 |
4.223e-02 |
Gamma |
|
8.83240e-01 |
9.579e-02 |
Gamma |
|
8.98670e-01 |
3.245e-02 |
Gamma |
|
9.25000e-01 |
7.828e-02 |
Gamma |
|
9.26000e-01 |
1.751e-02 |
Gamma |
|
9.26720e-01 |
7.210e-02 |
Gamma |
|
9.46000e-01 |
1.339e-01 |
Gamma |
|
9.47700e-01 |
1.617e-02 |
Gamma |
|
9.80300e-01 |
2.678e-02 |
Gamma |
|
9.80300e-01 |
1.751e-02 |
Gamma |
|
9.84200e-01 |
1.617e-02 |
Gamma |
|
1.35290e+00 |
1.154e-02 |
Gamma |
|
1.39390e+00 |
2.060e-02 |
Gamma |
|
1.08972e-01 |
1.368e-02 |
Beta |
|
1.18112e-01 |
7.062e-02 |
Beta |
|
1.24733e-01 |
2.472e-02 |
Beta |
|
1.32533e-01 |
1.006e-02 |
Beta |
|
1.37043e-01 |
2.913e-01 |
Beta |
|
1.37221e-01 |
1.095e-01 |
Beta |
|
1.46800e-01 |
6.179e-02 |
Beta |
|
1.93976e-01 |
1.713e-01 |
Beta |
|
3.46378e-01 |
2.560e-02 |
Beta |
|
3.68195e-01 |
1.766e-02 |
Beta |
|
3.83571e-01 |
4.237e-02 |
Beta |
|
3.85333e-01 |
1.766e-02 |
Beta |
|
3.85383e-01 |
3.443e-02 |
Beta |
|
7.21807e-05 |
6.872e+00 |
Auger electron |
|
1.63083e-04 |
4.384e-02 |
Auger electron |
|
1.86217e-04 |
6.728e+00 |
Auger electron |
|
1.92485e-04 |
3.849e+00 |
Auger electron |
|
5.42717e-04 |
9.979e-01 |
Auger electron |
|
1.32437e-03 |
3.286e-01 |
Auger electron |
|
2.44031e-03 |
2.218e+00 |
Auger electron |
|
2.91214e-03 |
4.167e-01 |
Auger electron |
|
3.53089e-03 |
2.452e-02 |
Auger electron |
|
1.02466e-02 |
5.553e-01 |
Auger electron |
|
1.25320e-02 |
3.479e-02 |
Conversion electron |
|
1.35776e-02 |
2.824e-01 |
Auger electron |
|
1.51900e-02 |
3.704e-02 |
Conversion electron |
|
1.69445e-02 |
3.384e-02 |
Auger electron |
|
2.17220e-02 |
1.166e-02 |
Conversion electron |
|
2.24460e-02 |
3.422e-01 |
Conversion electron |
|
2.40400e-02 |
1.581e-02 |
Conversion electron |
|
2.44060e-02 |
2.405e-02 |
Conversion electron |
|
2.63080e-02 |
3.046e-01 |
Conversion electron |
|
2.76700e-02 |
1.121e-02 |
Conversion electron |
|
2.82680e-02 |
2.068e-02 |
Conversion electron |
|
3.66000e-02 |
1.298e-02 |
Conversion electron |
|
3.74220e-02 |
2.007e-02 |
Conversion electron |
|
3.92004e-02 |
1.819e-01 |
Conversion electron |
|
4.11604e-02 |
1.391e-02 |
Conversion electron |
|
4.34900e-02 |
6.400e-02 |
Conversion electron |
|
5.47400e-02 |
2.097e-02 |
Conversion electron |
|
7.00400e-02 |
5.772e-02 |
Conversion electron |
|
7.88160e-02 |
1.838e-01 |
Conversion electron |
|
8.26780e-02 |
1.254e-01 |
Conversion electron |
|
8.27260e-02 |
1.146e-02 |
Conversion electron |
|
8.38400e-02 |
1.895e-02 |
Conversion electron |
|
8.70100e-02 |
1.092e-02 |
Conversion electron |
|
9.55704e-02 |
8.890e-02 |
Conversion electron |
|
9.98600e-02 |
3.124e-02 |
Conversion electron |
|
1.04416e-01 |
1.613e-02 |
Conversion electron |
|
1.10390e-01 |
4.262e-02 |
Conversion electron |
|
1.11140e-01 |
1.081e-01 |
Conversion electron |
|
1.29260e-01 |
1.139e-02 |
Conversion electron |
|
1.31666e-01 |
5.158e-02 |
Conversion electron |
|
1.35528e-01 |
2.918e-02 |
Conversion electron |
|
1.48420e-01 |
2.373e-02 |
Conversion electron |
|
2.05482e-01 |
1.858e-02 |
Conversion electron |
|
2.53390e-01 |
1.209e-02 |
Conversion electron |
|
4.53390e-01 |
1.261e-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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