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Radionuclide Dosimetric Data Sheets
Plutonium-232
Summary data
General
Classification
Isotope: Pu-232
Atomic number (Z): 94
Mass number (A): 232
Neutron number (N): 138
Radioactive decay
Decay modes: α, Electron capture
Half-life: 33.7 [m]
Decay constant: 3.4280e-04 [1/s]
Daughters: Np-232 (77.0%), U-228 (23.0%)
Radioactive daughters: Np-232, U-228
Dosimetric constants
Mean alpha energy: 1.5402 [MeV]
Mean electron energy: 0.00868 [MeV]
Mean photon energy: 0.06334 [MeV]
Air kerma rate constant, Γ10: 9.075e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 9.075e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.482e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 2.468e-13
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
1.391e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.015e-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-232 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-232 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-232 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.44306e-05 |
8.548e+00 |
X-ray |
|
3.34575e-03 |
5.417e-02 |
X-ray |
|
1.37668e-02 |
1.462e-02 |
X-ray |
|
1.39579e-02 |
1.285e-01 |
X-ray |
|
1.68587e-02 |
2.714e-02 |
X-ray |
|
1.78427e-02 |
7.232e-02 |
X-ray |
|
2.08890e-02 |
1.653e-02 |
X-ray |
|
9.74979e-02 |
1.670e-01 |
X-ray |
|
1.01574e-01 |
2.657e-01 |
X-ray |
|
1.13834e-01 |
3.073e-02 |
X-ray |
|
1.14778e-01 |
6.014e-02 |
X-ray |
|
1.18129e-01 |
1.566e-02 |
X-ray |
|
7.90306e-05 |
2.497e+00 |
Auger electron |
|
1.69850e-04 |
1.486e-02 |
Auger electron |
|
1.89970e-04 |
1.304e+00 |
Auger electron |
|
2.07953e-04 |
2.248e+00 |
Auger electron |
|
5.50164e-04 |
3.410e-01 |
Auger electron |
|
1.57361e-03 |
1.419e-01 |
Auger electron |
|
2.48643e-03 |
7.428e-01 |
Auger electron |
|
2.98492e-03 |
1.453e-01 |
Auger electron |
|
1.02950e-02 |
1.886e-01 |
Auger electron |
|
1.37198e-02 |
9.672e-02 |
Auger electron |
|
1.71773e-02 |
1.166e-02 |
Auger electron |
|
7.72522e-02 |
1.127e-02 |
Auger electron |
|
6.54215e+00 |
7.590e-02 |
Alpha |
|
6.60013e+00 |
1.541e-01 |
Alpha |
|
1.14849e-01 |
7.590e-02 |
Alpha recoil |
|
1.15867e-01 |
1.541e-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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