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Radionuclide Dosimetric Data Sheets
Promethium-145
Summary data
General
Classification
Isotope: Pm-145
Atomic number (Z): 61
Mass number (A): 145
Neutron number (N): 84
Radioactive decay
Decay modes: α, Electron capture
Half-life: 17.7 [y]
Decay constant: 1.2410e-09 [1/s]
Daughters: Nd-145 (100.0%), Pr-141 (2.8e-07%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.01258 [MeV]
Mean photon energy: 0.0315 [MeV]
Air kerma rate constant, Γ10: 2.910e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.910e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.016e-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-:
2.016e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 5.047e-15
[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-145 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-145 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-145 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.52068e-05 |
1.194e+01 |
X-ray |
|
8.65309e-04 |
1.041e-02 |
X-ray |
|
5.21638e-03 |
5.490e-02 |
X-ray |
|
5.72010e-03 |
3.468e-02 |
X-ray |
|
3.68696e-02 |
2.163e-01 |
X-ray |
|
3.73962e-02 |
3.939e-01 |
X-ray |
|
4.22041e-02 |
3.891e-02 |
X-ray |
|
4.23100e-02 |
7.530e-02 |
X-ray |
|
4.33673e-02 |
1.624e-02 |
X-ray |
|
7.24000e-02 |
1.850e-02 |
Gamma |
|
1.36628e-05 |
1.198e+00 |
Auger electron |
|
7.84943e-05 |
1.215e+00 |
Auger electron |
|
9.39094e-05 |
4.532e+00 |
Auger electron |
|
1.51201e-04 |
7.160e-01 |
Auger electron |
|
4.57478e-04 |
1.787e-01 |
Auger electron |
|
7.11736e-04 |
1.574e+00 |
Auger electron |
|
8.76025e-04 |
1.085e-01 |
Auger electron |
|
4.16649e-03 |
5.949e-01 |
Auger electron |
|
5.11982e-03 |
2.002e-01 |
Auger electron |
|
6.10837e-03 |
1.668e-02 |
Auger electron |
|
2.36030e-02 |
1.814e-02 |
Conversion electron |
|
2.88030e-02 |
5.795e-02 |
Conversion electron |
|
3.03768e-02 |
4.162e-02 |
Auger electron |
|
3.58432e-02 |
1.997e-02 |
Auger electron |
|
6.04726e-02 |
1.175e-02 |
Conversion electron |
|
6.09993e-02 |
1.386e-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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