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Radionuclide Dosimetric Data Sheets
Curium-248
Summary data
General
Classification
Isotope: Cm-248
Atomic number (Z): 96
Mass number (A): 248
Neutron number (N): 152
Radioactive decay
Decay modes: α, Spontaneus fission
Half-life: 348000.0 [y]
Decay constant: 6.3118e-14 [1/s]
Daughters: Pu-244 (91.6%), SF (8.39%)
Radioactive daughters: Pu-244
Dosimetric constants
Mean alpha energy: 4.7212 [MeV]
Mean electron energy: 0.77158 [MeV]
Mean photon energy: 1.31266 [MeV]
Air kerma rate constant, Γ10: 1.392e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.584e-16 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 8.800e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 7.564e-13
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
1.236e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.103e-13
[Gy·kg/Bq·s]
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/Cm-248 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/Cm-248 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/Cm-248 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.20458e-05 |
1.652e+00 |
X-ray |
|
3.45654e-03 |
1.088e-02 |
X-ray |
|
1.42941e-02 |
2.227e-02 |
X-ray |
|
1.83932e-02 |
2.391e-02 |
X-ray |
|
3.00000e-02 |
1.141e-02 |
Delayed gamma |
|
3.14000e-02 |
1.816e-02 |
Prompt gamma |
|
5.00000e-02 |
1.141e-02 |
Delayed gamma |
|
7.00000e-02 |
1.141e-02 |
Delayed gamma |
|
9.00000e-02 |
1.141e-02 |
Delayed gamma |
|
1.10000e-01 |
1.141e-02 |
Delayed gamma |
|
1.10000e-01 |
1.030e-02 |
Prompt gamma |
|
1.30000e-01 |
1.141e-02 |
Delayed gamma |
|
1.30000e-01 |
1.030e-02 |
Prompt gamma |
|
1.50000e-01 |
1.141e-02 |
Delayed gamma |
|
1.50000e-01 |
1.030e-02 |
Prompt gamma |
|
1.70000e-01 |
1.141e-02 |
Delayed gamma |
|
1.70000e-01 |
1.030e-02 |
Prompt gamma |
|
1.90000e-01 |
1.141e-02 |
Delayed gamma |
|
1.90000e-01 |
1.030e-02 |
Prompt gamma |
|
2.25000e-01 |
2.581e-02 |
Prompt gamma |
|
2.25000e-01 |
2.801e-02 |
Delayed gamma |
|
2.75000e-01 |
2.581e-02 |
Prompt gamma |
|
2.75000e-01 |
2.801e-02 |
Delayed gamma |
|
3.25000e-01 |
2.581e-02 |
Prompt gamma |
|
3.25000e-01 |
2.801e-02 |
Delayed gamma |
|
3.75000e-01 |
2.801e-02 |
Delayed gamma |
|
3.75000e-01 |
2.581e-02 |
Prompt gamma |
|
4.25000e-01 |
2.581e-02 |
Prompt gamma |
|
4.40000e-01 |
7.883e-02 |
Delayed gamma |
|
4.75000e-01 |
2.581e-02 |
Prompt gamma |
|
5.25000e-01 |
2.581e-02 |
Prompt gamma |
|
5.40000e-01 |
6.120e-02 |
Delayed gamma |
|
5.75000e-01 |
2.581e-02 |
Prompt gamma |
|
6.40000e-01 |
4.771e-02 |
Delayed gamma |
|
6.49000e-01 |
4.971e-02 |
Prompt gamma |
|
7.40000e-01 |
3.734e-02 |
Delayed gamma |
|
7.49000e-01 |
4.155e-02 |
Prompt gamma |
|
8.40000e-01 |
2.904e-02 |
Delayed gamma |
|
8.49000e-01 |
3.486e-02 |
Prompt gamma |
|
9.49000e-01 |
2.912e-02 |
Prompt gamma |
|
1.04900e+00 |
2.441e-02 |
Prompt gamma |
|
1.10000e+00 |
1.224e-01 |
Delayed gamma |
|
1.14900e+00 |
2.037e-02 |
Prompt gamma |
|
1.25000e+00 |
1.706e-02 |
Prompt gamma |
|
1.35000e+00 |
1.427e-02 |
Prompt gamma |
|
1.45000e+00 |
1.191e-02 |
Prompt gamma |
|
1.56000e+00 |
7.468e-02 |
Delayed gamma |
|
1.73000e+00 |
4.228e-02 |
Prompt gamma |
|
2.00000e+00 |
3.941e-02 |
Delayed gamma |
|
2.23000e+00 |
2.456e-02 |
Prompt gamma |
|
2.40000e+00 |
2.904e-02 |
Delayed gamma |
|
2.73000e+00 |
1.419e-02 |
Prompt gamma |
|
2.80000e+00 |
1.660e-02 |
Delayed gamma |
|
3.25000e+00 |
1.245e-02 |
Delayed gamma |
|
1.37021e+00 |
5.586e-01 |
Delayed beta |
|
8.91209e-05 |
4.522e-01 |
Auger electron |
|
1.91648e-04 |
2.579e-01 |
Auger electron |
|
2.36969e-04 |
4.335e-01 |
Auger electron |
|
5.73551e-04 |
6.691e-02 |
Auger electron |
|
1.47675e-03 |
1.536e-02 |
Auger electron |
|
2.56518e-03 |
1.419e-01 |
Auger electron |
|
3.09859e-03 |
2.912e-02 |
Auger electron |
|
1.07762e-02 |
3.511e-02 |
Auger electron |
|
1.43231e-02 |
1.822e-02 |
Auger electron |
|
2.18290e-02 |
6.347e-02 |
Conversion electron |
|
2.61290e-02 |
5.445e-02 |
Conversion electron |
|
3.96501e-02 |
3.359e-02 |
Conversion electron |
|
4.42000e-02 |
1.199e-02 |
Conversion electron |
|
5.03494e+00 |
1.651e-01 |
Alpha |
|
5.07842e+00 |
7.502e-01 |
Alpha |
|
8.25936e-02 |
1.651e-01 |
Alpha recoil |
|
8.33070e-02 |
7.502e-01 |
Alpha recoil |
|
9.08555e+01 |
1.678e-01 |
Fission fragment |
|
1.95368e+00 |
2.609e-01 |
Neutron |
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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