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Radionuclide Dosimetric Data Sheets
Promethium-136
Summary data
General
Classification
Isotope: Pm-136
Atomic number (Z): 61
Mass number (A): 136
Neutron number (N): 75
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 107.0 [s]
Decay constant: 6.4780e-03 [1/s]
Daughters: Nd-136 (100.0%)
Radioactive daughters: Nd-136
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 2.14362 [MeV]
Mean photon energy: 2.71776 [MeV]
Air kerma rate constant, Γ10: 6.686e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.016e-16 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 3.434e-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-:
3.434e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.354e-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-136 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-136 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-136 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.51985e-05 |
1.566e+00 |
X-ray |
|
3.68696e-02 |
3.280e-02 |
X-ray |
|
3.73962e-02 |
5.973e-02 |
X-ray |
|
4.23100e-02 |
1.142e-02 |
X-ray |
|
3.02800e-01 |
1.365e-01 |
Gamma |
|
3.70000e-01 |
1.010e-01 |
Gamma |
|
3.73500e-01 |
8.976e-01 |
Gamma |
|
4.88000e-01 |
9.163e-02 |
Gamma |
|
5.11000e-01 |
1.793e+00 |
Annihilation photon |
|
6.02700e-01 |
4.974e-01 |
Gamma |
|
6.78000e-01 |
6.919e-02 |
Gamma |
|
6.93000e-01 |
2.618e-02 |
Gamma |
|
6.96000e-01 |
1.010e-01 |
Gamma |
|
7.70400e-01 |
1.795e-01 |
Gamma |
|
8.15000e-01 |
3.085e-01 |
Gamma |
|
8.58000e-01 |
3.142e-01 |
Gamma |
|
8.62100e-01 |
7.760e-02 |
Gamma |
|
1.05970e+00 |
1.374e-01 |
Gamma |
|
1.07000e+00 |
2.618e-02 |
Gamma |
|
2.05608e+00 |
3.049e-02 |
Positron |
|
2.12174e+00 |
1.210e-01 |
Positron |
|
2.26530e+00 |
1.789e-01 |
Positron |
|
2.27034e+00 |
1.169e-01 |
Positron |
|
2.32185e+00 |
9.148e-02 |
Positron |
|
2.40779e+00 |
1.403e-01 |
Positron |
|
2.50642e+00 |
6.404e-02 |
Positron |
|
2.61653e+00 |
1.118e-02 |
Positron |
|
2.77605e+00 |
1.423e-01 |
Positron |
|
1.36628e-05 |
1.567e-01 |
Auger electron |
|
7.81295e-05 |
1.595e-01 |
Auger electron |
|
9.39812e-05 |
5.938e-01 |
Auger electron |
|
1.51340e-04 |
9.116e-02 |
Auger electron |
|
4.42601e-04 |
1.875e-02 |
Auger electron |
|
7.10714e-04 |
2.104e-01 |
Auger electron |
|
8.73481e-04 |
1.445e-02 |
Auger electron |
|
4.14614e-03 |
7.987e-02 |
Auger electron |
|
5.09690e-03 |
2.685e-02 |
Auger electron |
|
3.29903e-01 |
1.956e-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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