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Radionuclide Dosimetric Data Sheets
Praseodymium-140
Summary data
General
Classification
Isotope: Pr-140
Atomic number (Z): 59
Mass number (A): 140
Neutron number (N): 81
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 3.39 [m]
Decay constant: 3.4078e-03 [1/s]
Daughters: Ce-140 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.55163 [MeV]
Mean photon energy: 0.54666 [MeV]
Air kerma rate constant, Γ10: 1.941e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.176e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 8.838e-14 [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-:
8.838e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 8.758e-14
[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/Pr-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/Pr-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/Pr-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/Pr-140 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.61261e-05 |
5.732e+00 |
X-ray |
|
4.82666e-03 |
2.294e-02 |
X-ray |
|
5.25981e-03 |
1.378e-02 |
X-ray |
|
3.42907e-02 |
1.087e-01 |
X-ray |
|
3.47432e-02 |
1.991e-01 |
X-ray |
|
3.91962e-02 |
1.935e-02 |
X-ray |
|
3.92855e-02 |
3.750e-02 |
X-ray |
|
5.11000e-01 |
1.024e+00 |
Annihilation photon |
|
1.06707e+00 |
5.119e-01 |
Positron |
|
1.22653e-05 |
8.145e-01 |
Auger electron |
|
6.25456e-05 |
8.849e-01 |
Auger electron |
|
7.40115e-05 |
1.926e+00 |
Auger electron |
|
1.35102e-04 |
3.009e-01 |
Auger electron |
|
3.89161e-04 |
6.432e-02 |
Auger electron |
|
6.26815e-04 |
7.074e-01 |
Auger electron |
|
7.79427e-04 |
5.129e-02 |
Auger electron |
|
3.85077e-03 |
2.732e-01 |
Auger electron |
|
4.70735e-03 |
8.999e-02 |
Auger electron |
|
2.83188e-02 |
2.351e-02 |
Auger electron |
|
3.33488e-02 |
1.108e-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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