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Radionuclide Dosimetric Data Sheets
Promethium-140
Summary data
General
Classification
Isotope: Pm-140
Atomic number (Z): 61
Mass number (A): 140
Neutron number (N): 79
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 9.2 [s]
Decay constant: 7.5342e-02 [1/s]
Daughters: Nd-140 (100.0%)
Radioactive daughters: Nd-140
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 2.04317 [MeV]
Mean photon energy: 1.05056 [MeV]
Air kerma rate constant, Γ10: 5.234e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.962e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 3.274e-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-:
3.274e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.683e-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/Pm-140 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/Pm-140 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-140 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-140 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.51978e-05 |
1.188e+00 |
X-ray |
|
3.68696e-02 |
2.510e-02 |
X-ray |
|
3.73962e-02 |
4.572e-02 |
X-ray |
|
4.77100e-01 |
2.560e-02 |
Gamma |
|
5.11000e-01 |
1.776e+00 |
Annihilation photon |
|
7.73800e-01 |
5.020e-02 |
Gamma |
|
1.13870e+00 |
1.506e-02 |
Gamma |
|
1.20480e+00 |
1.857e-02 |
Gamma |
|
1.62760e+00 |
1.398e-02 |
Positron |
|
1.96389e+00 |
2.896e-02 |
Positron |
|
2.33036e+00 |
8.368e-01 |
Positron |
|
1.36628e-05 |
1.189e-01 |
Auger electron |
|
7.81662e-05 |
1.209e-01 |
Auger electron |
|
9.39733e-05 |
4.506e-01 |
Auger electron |
|
1.51233e-04 |
6.930e-02 |
Auger electron |
|
4.44636e-04 |
1.451e-02 |
Auger electron |
|
7.10777e-04 |
1.594e-01 |
Auger electron |
|
8.73668e-04 |
1.095e-02 |
Auger electron |
|
4.14675e-03 |
6.050e-02 |
Auger electron |
|
5.09768e-03 |
2.034e-02 |
Auger 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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