<= Return to MIRDspec isotope database
Radionuclide Dosimetric Data Sheets
Curium-246
Summary data
General
Classification
Isotope: Cm-246
Atomic number (Z): 96
Mass number (A): 246
Neutron number (N): 150
Radioactive decay
Decay modes: α, Spontaneus fission
Half-life: 4760.0 [y]
Decay constant: 4.6145e-12 [1/s]
Daughters: Pu-242 (100.0%), SF (0.0263%)
Radioactive daughters: Pu-242
Dosimetric constants
Mean alpha energy: 5.4654 [MeV]
Mean electron energy: 0.00847 [MeV]
Mean photon energy: 0.00496 [MeV]
Air kerma rate constant, Γ10: 1.485e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.990e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 8.770e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 8.757e-13
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
1.357e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 7.947e-16
[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-246 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-246 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-246 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.20458e-05 |
1.763e+00 |
X-ray |
|
3.45656e-03 |
1.161e-02 |
X-ray |
|
1.42941e-02 |
2.376e-02 |
X-ray |
|
1.83932e-02 |
2.551e-02 |
X-ray |
|
8.91208e-05 |
4.825e-01 |
Auger electron |
|
1.91649e-04 |
2.752e-01 |
Auger electron |
|
2.36971e-04 |
4.625e-01 |
Auger electron |
|
5.73582e-04 |
7.138e-02 |
Auger electron |
|
1.47669e-03 |
1.639e-02 |
Auger electron |
|
2.56519e-03 |
1.513e-01 |
Auger electron |
|
3.09861e-03 |
3.107e-02 |
Auger electron |
|
1.07766e-02 |
3.746e-02 |
Auger electron |
|
1.43235e-02 |
1.944e-02 |
Auger electron |
|
2.21740e-02 |
6.809e-02 |
Conversion electron |
|
2.64740e-02 |
5.830e-02 |
Conversion electron |
|
3.99951e-02 |
3.601e-02 |
Conversion electron |
|
4.45450e-02 |
1.285e-02 |
Conversion electron |
|
5.34191e+00 |
1.780e-01 |
Alpha |
|
5.38572e+00 |
8.218e-01 |
Alpha |
|
8.83534e-02 |
1.780e-01 |
Alpha recoil |
|
8.90781e-02 |
8.218e-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)
<= Return to MIRDspec isotope database
