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Radionuclide Dosimetric Data Sheets
Plutonium-239
Summary data
General
Classification
Isotope: Pu-239
Atomic number (Z): 94
Mass number (A): 239
Neutron number (N): 145
Radioactive decay
Decay modes: α
Half-life: 24110.0 [y]
Decay constant: 9.1103e-13 [1/s]
Daughters: U-235m (99.9%), U-235 (0.06%)
Radioactive daughters: U-235m, U-235
Dosimetric constants
Mean alpha energy: 5.2357 [MeV]
Mean electron energy: 0.00745 [MeV]
Mean photon energy: 0.00107 [MeV]
Air kerma rate constant, Γ10: 1.113e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.113e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 8.400e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 8.389e-13
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
1.194e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.714e-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-239 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-239 Summary 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-239 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.53950e-05 |
2.980e+00 |
X-ray |
|
3.29991e-03 |
1.505e-02 |
X-ray |
|
1.36268e-02 |
1.603e-02 |
X-ray |
|
1.73072e-02 |
1.586e-02 |
X-ray |
|
7.18315e-05 |
8.276e-01 |
Auger electron |
|
1.96864e-04 |
7.710e-01 |
Auger electron |
|
1.99282e-04 |
4.470e-01 |
Auger electron |
|
6.37011e-04 |
2.233e-01 |
Auger electron |
|
1.28695e-03 |
1.482e-02 |
Auger electron |
|
2.49492e-03 |
2.142e-01 |
Auger electron |
|
3.01009e-03 |
4.168e-02 |
Auger electron |
|
8.68540e-03 |
1.351e-01 |
Conversion electron |
|
1.02765e-02 |
2.706e-02 |
Auger electron |
|
1.29750e-02 |
4.853e-02 |
Conversion electron |
|
1.36090e-02 |
1.377e-02 |
Auger electron |
|
3.05800e-02 |
3.340e-02 |
Conversion electron |
|
3.44420e-02 |
2.842e-02 |
Conversion electron |
|
4.73344e-02 |
1.746e-02 |
Conversion electron |
|
5.10577e+00 |
1.193e-01 |
Alpha |
|
5.14378e+00 |
1.710e-01 |
Alpha |
|
5.15653e+00 |
7.072e-01 |
Alpha |
|
8.69632e-02 |
1.193e-01 |
Alpha recoil |
|
8.76106e-02 |
1.710e-01 |
Alpha recoil |
|
8.78277e-02 |
7.072e-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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