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Radionuclide Dosimetric Data Sheets
Cerium-144
Summary data
General
Classification
Isotope: Ce-144
Atomic number (Z): 58
Mass number (A): 144
Neutron number (N): 86
Radioactive decay
Decay modes: β-
Half-life: 284.9 [d]
Decay constant: 2.8158e-08 [1/s]
Daughters: Pr-144 (99.0%), Pr-144m (0.977%)
Radioactive daughters: Pr-144, Pr-144m
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.09162 [MeV]
Mean photon energy: 0.01936 [MeV]
Air kerma rate constant, Γ10: 8.529e-19 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 8.529e-19 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.468e-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-:
1.468e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 3.102e-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/Ce-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/Ce-144 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/Ce-144 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/Ce-144 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.56279e-05 |
1.396e+00 |
X-ray |
|
3.55671e-02 |
2.412e-02 |
X-ray |
|
3.60557e-02 |
4.406e-02 |
X-ray |
|
8.01200e-02 |
1.364e-02 |
Gamma |
|
1.33515e-01 |
1.109e-01 |
Gamma |
|
5.03217e-02 |
1.960e-01 |
Beta |
|
6.62660e-02 |
3.900e-02 |
Beta |
|
9.12827e-02 |
7.650e-01 |
Beta |
|
1.29601e-05 |
1.636e-01 |
Auger electron |
|
7.07089e-05 |
1.744e-01 |
Auger electron |
|
8.71369e-05 |
4.908e-01 |
Auger electron |
|
1.42831e-04 |
7.943e-02 |
Auger electron |
|
4.29992e-04 |
2.079e-02 |
Auger electron |
|
6.68489e-04 |
1.773e-01 |
Auger electron |
|
8.27919e-04 |
1.258e-02 |
Auger electron |
|
4.01908e-03 |
6.785e-02 |
Auger electron |
|
4.92504e-03 |
2.263e-02 |
Auger electron |
|
3.81100e-02 |
2.918e-02 |
Conversion electron |
|
9.15050e-02 |
5.514e-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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