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Radionuclide Dosimetric Data Sheets
Promethium-144
Summary data
General
Classification
Isotope: Pm-144
Atomic number (Z): 61
Mass number (A): 144
Neutron number (N): 83
Radioactive decay
Decay modes: Electron capture
Half-life: 363.0 [d]
Decay constant: 2.2101e-08 [1/s]
Daughters: Nd-144 (100.0%)
Radioactive daughters: Nd-144
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.01712 [MeV]
Mean photon energy: 1.56311 [MeV]
Air kerma rate constant, Γ10: 6.047e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 6.047e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.743e-15 [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-:
2.743e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.504e-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-144 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-144 Summary 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-144 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.51991e-05 |
1.080e+01 |
X-ray |
|
5.21638e-03 |
5.251e-02 |
X-ray |
|
5.72010e-03 |
3.239e-02 |
X-ray |
|
3.68696e-02 |
2.240e-01 |
X-ray |
|
3.73962e-02 |
4.079e-01 |
X-ray |
|
4.22041e-02 |
4.030e-02 |
X-ray |
|
4.23100e-02 |
7.798e-02 |
X-ray |
|
4.33673e-02 |
1.682e-02 |
X-ray |
|
4.76780e-01 |
4.378e-01 |
Gamma |
|
6.18010e-01 |
9.850e-01 |
Gamma |
|
6.96490e-01 |
9.949e-01 |
Gamma |
|
7.78570e-01 |
1.502e-02 |
Gamma |
|
1.36628e-05 |
1.081e+00 |
Auger electron |
|
7.82182e-05 |
1.099e+00 |
Auger electron |
|
9.39631e-05 |
4.096e+00 |
Auger electron |
|
1.51218e-04 |
6.325e-01 |
Auger electron |
|
4.47123e-04 |
1.366e-01 |
Auger electron |
|
7.10921e-04 |
1.445e+00 |
Auger electron |
|
8.74027e-04 |
9.931e-02 |
Auger electron |
|
4.14975e-03 |
5.481e-01 |
Auger electron |
|
5.10106e-03 |
1.843e-01 |
Auger electron |
|
6.08623e-03 |
1.532e-02 |
Auger electron |
|
3.03768e-02 |
4.311e-02 |
Auger electron |
|
3.58432e-02 |
2.068e-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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