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Radionuclide Dosimetric Data Sheets
Curium-244
Summary data
General
Classification
Isotope: Cm-244
Atomic number (Z): 96
Mass number (A): 244
Neutron number (N): 148
Radioactive decay
Decay modes: α, Spontaneus fission
Half-life: 18.1 [y]
Decay constant: 1.2135e-09 [1/s]
Daughters: Pu-240 (100.0%), SF (0.000137%)
Radioactive daughters: Pu-240
Dosimetric constants
Mean alpha energy: 5.8915 [MeV]
Mean electron energy: 0.00793 [MeV]
Mean photon energy: 0.00171 [MeV]
Air kerma rate constant, Γ10: 1.865e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.867e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 9.452e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 9.439e-13
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
1.271e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.740e-16
[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-244 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-244 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-244 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-244 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.20453e-05 |
2.212e+00 |
X-ray |
|
3.45638e-03 |
1.457e-02 |
X-ray |
|
1.42941e-02 |
2.991e-02 |
X-ray |
|
1.83932e-02 |
3.189e-02 |
X-ray |
|
8.91213e-05 |
6.054e-01 |
Auger electron |
|
1.91637e-04 |
3.453e-01 |
Auger electron |
|
2.36936e-04 |
5.803e-01 |
Auger electron |
|
5.73068e-04 |
8.953e-02 |
Auger electron |
|
1.47638e-03 |
2.047e-02 |
Auger electron |
|
2.56499e-03 |
1.899e-01 |
Auger electron |
|
3.09836e-03 |
3.899e-02 |
Auger electron |
|
1.07707e-02 |
4.704e-02 |
Auger electron |
|
1.43172e-02 |
2.441e-02 |
Auger electron |
|
2.04530e-02 |
8.499e-02 |
Conversion electron |
|
2.47530e-02 |
7.348e-02 |
Conversion electron |
|
3.82741e-02 |
4.513e-02 |
Conversion electron |
|
4.28240e-02 |
1.610e-02 |
Conversion electron |
|
5.76272e+00 |
2.359e-01 |
Alpha |
|
5.80484e+00 |
7.638e-01 |
Alpha |
|
9.61077e-02 |
2.359e-01 |
Alpha recoil |
|
9.68102e-02 |
7.638e-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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