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Radionuclide Dosimetric Data Sheets
Plutonium-246
Summary data
General
Classification
Isotope: Pu-246
Atomic number (Z): 94
Mass number (A): 246
Neutron number (N): 152
Radioactive decay
Decay modes: β-
Half-life: 10.84 [d]
Decay constant: 7.4009e-07 [1/s]
Daughters: Am-246m (100.0%)
Radioactive daughters: Am-246m
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.11591 [MeV]
Mean photon energy: 0.14308 [MeV]
Air kerma rate constant, Γ10: 1.441e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.441e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.857e-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-:
1.857e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.292e-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/Pu-246 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/Pu-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/Pu-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/Pu-246 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.21574e-05 |
1.299e+01 |
X-ray |
|
3.55140e-03 |
8.681e-02 |
X-ray |
|
1.24249e-02 |
1.294e-02 |
X-ray |
|
1.44234e-02 |
2.028e-02 |
X-ray |
|
1.46345e-02 |
1.781e-01 |
X-ray |
|
1.77003e-02 |
3.815e-02 |
X-ray |
|
1.80853e-02 |
1.174e-02 |
X-ray |
|
1.89584e-02 |
1.112e-01 |
X-ray |
|
2.21841e-02 |
2.588e-02 |
X-ray |
|
2.75800e-02 |
3.525e-02 |
Gamma |
|
4.38100e-02 |
2.500e-01 |
Gamma |
|
1.02508e-01 |
1.402e-01 |
X-ray |
|
1.07043e-01 |
2.207e-01 |
X-ray |
|
1.19828e-01 |
2.566e-02 |
X-ray |
|
1.20885e-01 |
5.041e-02 |
X-ray |
|
1.24423e-01 |
1.327e-02 |
X-ray |
|
1.79940e-01 |
9.700e-02 |
Gamma |
|
2.23750e-01 |
2.350e-01 |
Gamma |
|
1.83680e-02 |
4.808e-02 |
Beta |
|
3.88340e-02 |
8.750e-01 |
Beta |
|
9.12683e-02 |
4.808e-02 |
Beta |
|
1.09980e-01 |
1.923e-02 |
Beta |
|
9.53278e-05 |
3.645e+00 |
Auger electron |
|
1.83821e-04 |
2.171e-02 |
Auger electron |
|
1.90364e-04 |
2.014e+00 |
Auger electron |
|
2.59894e-04 |
3.406e+00 |
Auger electron |
|
5.85281e-04 |
5.939e-01 |
Auger electron |
|
1.85951e-03 |
1.870e-01 |
Auger electron |
|
2.61792e-03 |
1.094e+00 |
Auger electron |
|
3.18420e-03 |
2.342e-01 |
Auger electron |
|
3.75300e-03 |
1.840e-02 |
Conversion electron |
|
3.86916e-03 |
1.437e-02 |
Auger electron |
|
4.51800e-03 |
3.703e-02 |
Conversion electron |
|
9.05300e-03 |
4.789e-02 |
Conversion electron |
|
1.08192e-02 |
2.479e-01 |
Auger electron |
|
1.15345e-02 |
1.288e-01 |
Conversion electron |
|
1.44654e-02 |
1.296e-01 |
Auger electron |
|
1.62200e-02 |
4.615e-02 |
Conversion electron |
|
1.81492e-02 |
1.591e-02 |
Auger electron |
|
1.99830e-02 |
6.035e-02 |
Conversion electron |
|
2.07480e-02 |
7.761e-02 |
Conversion electron |
|
2.28945e-02 |
2.738e-02 |
Conversion electron |
|
2.52830e-02 |
8.472e-02 |
Conversion electron |
|
3.91245e-02 |
5.675e-02 |
Conversion electron |
|
4.38100e-02 |
1.978e-02 |
Conversion electron |
|
5.43700e-02 |
4.563e-01 |
Conversion electron |
|
9.81800e-02 |
1.503e-02 |
Conversion electron |
|
1.56113e-01 |
8.179e-02 |
Conversion electron |
|
1.75255e-01 |
2.233e-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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