<= Return to MIRDspec isotope database
Radionuclide Dosimetric Data Sheets
Promethium-142
Summary data
General
Classification
Isotope: Pm-142
Atomic number (Z): 61
Mass number (A): 142
Neutron number (N): 81
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 40.5 [s]
Decay constant: 1.7115e-02 [1/s]
Daughters: Nd-142 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 1.31217 [MeV]
Mean photon energy: 0.85613 [MeV]
Air kerma rate constant, Γ10: 2.763e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.246e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.102e-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-:
2.102e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.372e-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-142 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-142 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-142 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-142 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.51978e-05 |
2.467e+00 |
X-ray |
|
5.21638e-03 |
1.211e-02 |
X-ray |
|
3.68696e-02 |
5.210e-02 |
X-ray |
|
3.73962e-02 |
9.488e-02 |
X-ray |
|
4.23100e-02 |
1.814e-02 |
X-ray |
|
5.11000e-01 |
1.534e+00 |
Annihilation photon |
|
1.57580e+00 |
3.300e-02 |
Gamma |
|
9.92046e-01 |
1.070e-02 |
Positron |
|
1.72032e+00 |
7.549e-01 |
Positron |
|
1.36628e-05 |
2.469e-01 |
Auger electron |
|
7.81684e-05 |
2.511e-01 |
Auger electron |
|
9.39729e-05 |
9.358e-01 |
Auger electron |
|
1.51232e-04 |
1.439e-01 |
Auger electron |
|
4.44746e-04 |
3.017e-02 |
Auger electron |
|
7.10783e-04 |
3.310e-01 |
Auger electron |
|
8.73683e-04 |
2.274e-02 |
Auger electron |
|
4.14687e-03 |
1.256e-01 |
Auger electron |
|
5.09782e-03 |
4.223e-02 |
Auger electron |
|
3.03768e-02 |
1.003e-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)
<= Return to MIRDspec isotope database
