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Radionuclide Dosimetric Data Sheets
Curium-245
Summary data
General
Classification
Isotope: Cm-245
Atomic number (Z): 96
Mass number (A): 245
Neutron number (N): 149
Radioactive decay
Decay modes: α, Spontaneus fission
Half-life: 8500.0 [y]
Decay constant: 2.5841e-12 [1/s]
Daughters: Pu-241 (100.0%), SF (6.1e-07%)
Radioactive daughters: Pu-241
Dosimetric constants
Mean alpha energy: 5.4473 [MeV]
Mean electron energy: 0.08239 [MeV]
Mean photon energy: 0.1084 [MeV]
Air kerma rate constant, Γ10: 1.541e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.541e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 8.860e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 8.728e-13
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
1.320e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.737e-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/Cm-245 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/Cm-245 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-245 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-245 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.19686e-05 |
1.598e+01 |
X-ray |
|
3.44493e-03 |
1.037e-01 |
X-ray |
|
1.21689e-02 |
1.614e-02 |
X-ray |
|
1.40932e-02 |
2.565e-02 |
X-ray |
|
1.42941e-02 |
2.252e-01 |
X-ray |
|
1.72768e-02 |
4.791e-02 |
X-ray |
|
1.75735e-02 |
2.654e-02 |
X-ray |
|
1.83932e-02 |
1.108e-01 |
X-ray |
|
1.85721e-02 |
2.182e-02 |
X-ray |
|
2.15285e-02 |
2.558e-02 |
X-ray |
|
9.99790e-02 |
2.164e-01 |
X-ray |
|
1.04279e-01 |
3.425e-01 |
X-ray |
|
1.16802e-01 |
3.972e-02 |
X-ray |
|
1.17801e-01 |
7.791e-02 |
X-ray |
|
1.20980e-01 |
1.001e-02 |
X-ray |
|
1.21244e-01 |
2.039e-02 |
X-ray |
|
1.32990e-01 |
2.774e-02 |
Gamma |
|
1.74940e-01 |
9.500e-02 |
Gamma |
|
8.90532e-05 |
4.390e+00 |
Auger electron |
|
1.76257e-04 |
2.761e-02 |
Auger electron |
|
1.92206e-04 |
2.452e+00 |
Auger electron |
|
2.36699e-04 |
4.193e+00 |
Auger electron |
|
5.83521e-04 |
6.704e-01 |
Auger electron |
|
1.77220e-03 |
3.676e-01 |
Auger electron |
|
2.55082e-03 |
1.362e+00 |
Auger electron |
|
3.08202e-03 |
2.786e-01 |
Auger electron |
|
3.73898e-03 |
1.672e-02 |
Auger electron |
|
1.06334e-02 |
3.290e-01 |
Auger electron |
|
1.06400e-02 |
2.822e-01 |
Conversion electron |
|
1.37100e-02 |
1.066e-02 |
Conversion electron |
|
1.41780e-02 |
1.705e-01 |
Auger electron |
|
1.77649e-02 |
2.076e-02 |
Auger electron |
|
1.88280e-02 |
2.377e-01 |
Conversion electron |
|
1.95790e-02 |
2.572e-02 |
Conversion electron |
|
3.06180e-02 |
2.419e-02 |
Conversion electron |
|
3.36880e-02 |
1.848e-02 |
Conversion electron |
|
3.74001e-02 |
6.473e-02 |
Conversion electron |
|
4.19500e-02 |
2.362e-02 |
Conversion electron |
|
5.25900e-02 |
4.430e-01 |
Conversion electron |
|
5.61280e-02 |
1.209e-02 |
Conversion electron |
|
7.91086e-02 |
1.430e-02 |
Auger electron |
|
1.09868e-01 |
5.015e-02 |
Conversion electron |
|
1.28440e-01 |
1.363e-02 |
Conversion electron |
|
1.51818e-01 |
7.836e-02 |
Conversion electron |
|
1.70390e-01 |
2.135e-02 |
Conversion electron |
|
5.30366e+00 |
4.984e-02 |
Alpha |
|
5.35955e+00 |
9.290e-01 |
Alpha |
|
8.80847e-02 |
4.984e-02 |
Alpha recoil |
|
8.90130e-02 |
9.290e-01 |
Alpha recoil |
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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