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Radionuclide Dosimetric Data Sheets
Plutonium-236
Summary data
General
Classification
Isotope: Pu-236
Atomic number (Z): 94
Mass number (A): 236
Neutron number (N): 142
Radioactive decay
Decay modes: α, Spontaneus fission
Half-life: 2.858 [y]
Decay constant: 7.6854e-09 [1/s]
Daughters: U-232 (100.0%), SF (1.37e-07%)
Radioactive daughters: U-232
Dosimetric constants
Mean alpha energy: 5.8523 [MeV]
Mean electron energy: 0.01282 [MeV]
Mean photon energy: 0.00224 [MeV]
Air kerma rate constant, Γ10: 2.846e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.846e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 9.397e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 9.376e-13
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
2.054e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 3.589e-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/Pu-236 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-236 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-236 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-236 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.55213e-05 |
3.185e+00 |
X-ray |
|
3.25975e-03 |
1.945e-02 |
X-ray |
|
1.36268e-02 |
4.132e-02 |
X-ray |
|
1.73072e-02 |
4.306e-02 |
X-ray |
|
7.21871e-05 |
8.575e-01 |
Auger electron |
|
1.86312e-04 |
8.401e-01 |
Auger electron |
|
1.92445e-04 |
4.826e-01 |
Auger electron |
|
5.39232e-04 |
1.235e-01 |
Auger electron |
|
1.19229e-03 |
3.026e-02 |
Auger electron |
|
2.44359e-03 |
2.771e-01 |
Auger electron |
|
2.91622e-03 |
5.213e-02 |
Auger electron |
|
1.02691e-02 |
6.970e-02 |
Auger electron |
|
1.35996e-02 |
3.546e-02 |
Auger electron |
|
2.65260e-02 |
1.193e-01 |
Conversion electron |
|
3.03880e-02 |
1.038e-01 |
Conversion electron |
|
4.32804e-02 |
6.287e-02 |
Conversion electron |
|
4.75700e-02 |
2.211e-02 |
Conversion electron |
|
5.72093e+00 |
3.056e-01 |
Alpha |
|
5.76769e+00 |
6.926e-01 |
Alpha |
|
9.87008e-02 |
3.056e-01 |
Alpha recoil |
|
9.95076e-02 |
6.926e-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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