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Radionuclide Dosimetric Data Sheets
Praseodymium-144m
Summary data
General
Classification
Isotope: Pr-144m
Atomic number (Z): 59
Mass number (A): 144
Neutron number (N): 85
Radioactive decay
Decay modes: β-, Internal transition
Half-life: 7.2 [m]
Decay constant: 1.6045e-03 [1/s]
Daughters: Pr-144 (99.9%), Nd-144 (0.07%)
Radioactive daughters: Pr-144, Nd-144
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.04746 [MeV]
Mean photon energy: 0.01335 [MeV]
Air kerma rate constant, Γ10: 1.255e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.255e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 7.604e-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-:
7.604e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.139e-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/Pr-144m 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-144m 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-144m 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-144m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.55685e-05 |
1.060e+01 |
X-ray |
|
5.01954e-03 |
5.001e-02 |
X-ray |
|
5.48691e-03 |
1.748e-02 |
X-ray |
|
3.55671e-02 |
8.514e-02 |
X-ray |
|
3.60557e-02 |
1.555e-01 |
X-ray |
|
4.06843e-02 |
1.524e-02 |
X-ray |
|
4.07816e-02 |
2.950e-02 |
X-ray |
|
1.29601e-05 |
1.246e+00 |
Auger electron |
|
3.35200e-05 |
1.012e-02 |
Auger electron |
|
7.07528e-05 |
1.296e+00 |
Auger electron |
|
8.70969e-05 |
3.767e+00 |
Auger electron |
|
1.40215e-04 |
6.079e-01 |
Auger electron |
|
4.43473e-04 |
1.396e-01 |
Auger electron |
|
6.68321e-04 |
1.350e+00 |
Auger electron |
|
8.28106e-04 |
9.603e-02 |
Auger electron |
|
3.97888e-03 |
5.080e-01 |
Auger electron |
|
4.88280e-03 |
1.689e-01 |
Auger electron |
|
5.82098e-03 |
1.383e-02 |
Auger electron |
|
1.70200e-02 |
3.237e-01 |
Conversion electron |
|
2.93378e-02 |
1.735e-02 |
Auger electron |
|
5.22302e-02 |
1.913e-01 |
Conversion electron |
|
5.25871e-02 |
2.850e-02 |
Conversion electron |
|
5.30756e-02 |
2.911e-01 |
Conversion electron |
|
5.78016e-02 |
1.286e-01 |
Conversion electron |
|
5.90300e-02 |
3.523e-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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