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Radionuclide Dosimetric Data Sheets
Promethium-154m
Summary data
General
Classification
Isotope: Pm-154m
Atomic number (Z): 61
Mass number (A): 154
Neutron number (N): 93
Radioactive decay
Decay modes: β-
Half-life: 2.68 [m]
Decay constant: 4.3106e-03 [1/s]
Daughters: Sm-154 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.94922 [MeV]
Mean photon energy: 1.7996 [MeV]
Air kerma rate constant, Γ10: 6.167e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 6.167e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.521e-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-:
1.521e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.883e-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/Pm-154m 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/Pm-154m 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/Pm-154m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.45292e-05 |
8.349e+00 |
X-ray |
|
5.62210e-03 |
4.887e-02 |
X-ray |
|
6.20530e-03 |
3.722e-02 |
X-ray |
|
3.95578e-02 |
1.126e-01 |
X-ray |
|
4.01680e-02 |
2.039e-01 |
X-ray |
|
4.53441e-02 |
2.043e-02 |
X-ray |
|
4.54683e-02 |
3.953e-02 |
X-ray |
|
6.45480e-02 |
4.560e-02 |
Gamma |
|
8.20160e-02 |
1.463e-01 |
Gamma |
|
1.07896e-01 |
6.460e-02 |
Gamma |
|
1.71600e-01 |
6.745e-02 |
Gamma |
|
1.84810e-01 |
3.040e-01 |
Gamma |
|
2.30820e-01 |
5.985e-02 |
Gamma |
|
2.32080e-01 |
4.180e-02 |
Gamma |
|
2.77040e-01 |
2.194e-02 |
Gamma |
|
2.79930e-01 |
1.130e-01 |
Gamma |
|
3.59160e-01 |
3.886e-02 |
Gamma |
|
3.75060e-01 |
1.852e-02 |
Gamma |
|
4.02150e-01 |
1.539e-02 |
Gamma |
|
4.15230e-01 |
1.178e-02 |
Gamma |
|
4.38760e-01 |
2.071e-02 |
Gamma |
|
4.82570e-01 |
1.368e-02 |
Gamma |
|
5.26000e-01 |
1.539e-02 |
Gamma |
|
5.46660e-01 |
1.378e-01 |
Gamma |
|
5.92500e-01 |
1.178e-02 |
Gamma |
|
6.28140e-01 |
1.273e-02 |
Gamma |
|
7.42200e-01 |
2.223e-02 |
Gamma |
|
7.43400e-01 |
2.660e-02 |
Gamma |
|
7.45400e-01 |
3.059e-02 |
Gamma |
|
8.33400e-01 |
2.337e-02 |
Gamma |
|
8.34450e-01 |
2.954e-02 |
Gamma |
|
8.39360e-01 |
3.705e-02 |
Gamma |
|
9.01900e-01 |
1.378e-02 |
Gamma |
|
9.21360e-01 |
2.660e-02 |
Gamma |
|
9.30380e-01 |
5.130e-02 |
Gamma |
|
1.20456e+00 |
1.264e-02 |
Gamma |
|
1.23000e+00 |
1.140e-02 |
Gamma |
|
1.26020e+00 |
1.111e-02 |
Gamma |
|
1.27185e+00 |
1.216e-02 |
Gamma |
|
1.31770e+00 |
1.102e-02 |
Gamma |
|
1.35805e+00 |
1.017e-01 |
Gamma |
|
1.43338e+00 |
1.520e-02 |
Gamma |
|
1.43994e+00 |
1.159e-01 |
Gamma |
|
1.44000e+00 |
1.026e-01 |
Gamma |
|
1.45730e+00 |
3.629e-02 |
Gamma |
|
1.54795e+00 |
1.425e-02 |
Gamma |
|
1.61197e+00 |
1.206e-02 |
Gamma |
|
1.62483e+00 |
5.130e-02 |
Gamma |
|
1.65539e+00 |
4.180e-02 |
Gamma |
|
1.73311e+00 |
1.729e-02 |
Gamma |
|
1.79685e+00 |
2.612e-02 |
Gamma |
|
1.84020e+00 |
3.800e-02 |
Gamma |
|
6.72180e-01 |
4.025e-02 |
Beta |
|
6.99014e-01 |
1.754e-02 |
Beta |
|
7.72745e-01 |
6.089e-02 |
Beta |
|
8.07948e-01 |
7.018e-01 |
Beta |
|
8.83393e-01 |
1.548e-02 |
Beta |
|
8.89441e-01 |
1.858e-02 |
Beta |
|
1.00905e+00 |
2.477e-02 |
Beta |
|
1.05398e+00 |
3.199e-02 |
Beta |
|
1.59197e+00 |
7.637e-02 |
Beta |
|
1.51033e-05 |
6.494e-01 |
Auger electron |
|
9.35139e-05 |
5.395e-01 |
Auger electron |
|
1.06810e-04 |
3.482e+00 |
Auger electron |
|
1.70544e-04 |
5.485e-01 |
Auger electron |
|
4.72123e-04 |
7.951e-02 |
Auger electron |
|
8.03326e-04 |
1.217e+00 |
Auger electron |
|
9.72098e-04 |
7.770e-02 |
Auger electron |
|
4.45211e-03 |
4.488e-01 |
Auger electron |
|
5.49981e-03 |
1.533e-01 |
Auger electron |
|
6.57975e-03 |
1.306e-02 |
Auger electron |
|
1.76720e-02 |
3.393e-02 |
Conversion electron |
|
3.25196e-02 |
1.945e-02 |
Auger electron |
|
3.51400e-02 |
2.895e-01 |
Conversion electron |
|
6.10200e-02 |
1.228e-02 |
Conversion electron |
|
7.43137e-02 |
2.559e-02 |
Conversion electron |
|
7.46978e-02 |
1.463e-01 |
Conversion electron |
|
7.53081e-02 |
1.614e-01 |
Conversion electron |
|
8.06083e-02 |
7.763e-02 |
Conversion electron |
|
8.20160e-02 |
2.020e-02 |
Conversion electron |
|
1.37934e-01 |
5.824e-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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