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Radionuclide Dosimetric Data Sheets

Protactinium-233

Summary data

General

Classification

Isotope:  Pa-233
Atomic number (Z):  91
Mass number (A):  233
Neutron number (N):  142

Radioactive decay

Decay modes:  β-
Half-life:  26.97 [d]
Decay constant:  2.9749e-07 [1/s]
Daughters:  U-233 (100.0%)
Radioactive daughters:  U-233

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.21505 [MeV]
Mean photon energy:  0.22291 [MeV]
Air kerma rate constant, Γ10:  2.053e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  2.053e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  3.445e-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-:  3.445e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  3.571e-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/Pa-233 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/Pa-233 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/Pa-233 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/Pa-233 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

7.54520e-05

1.630e+01

X-ray

3.25185e-03

9.793e-02

X-ray

1.16607e-02

1.455e-02

X-ray

1.34452e-02

2.370e-02

X-ray

1.36268e-02

2.083e-01

X-ray

1.64469e-02

4.368e-02

X-ray

1.65865e-02

2.513e-02

X-ray

1.73072e-02

1.080e-01

X-ray

1.74784e-02

2.186e-02

X-ray

2.02658e-02

2.447e-02

X-ray

7.53540e-02

1.390e-02

Gamma

8.68140e-02

1.970e-02

Gamma

9.50660e-02

1.109e-01

X-ray

9.89281e-02

1.775e-01

X-ray

1.10929e-01

2.047e-02

X-ray

1.11820e-01

4.003e-02

X-ray

1.15080e-01

1.035e-02

X-ray

3.00340e-01

6.620e-02

Gamma

3.12170e-01

3.860e-01

Gamma

3.40810e-01

4.470e-02

Gamma

3.98620e-01

1.390e-02

Gamma

4.15760e-01

1.745e-02

Gamma

4.14129e-02

2.539e-01

Beta

4.62558e-02

1.503e-01

Beta

6.29285e-02

3.666e-01

Beta

7.12802e-02

1.558e-01

Beta

1.70190e-01

7.332e-02

Beta

7.21512e-05

4.409e+00

Auger electron

1.63023e-04

2.807e-02

Auger electron

1.86446e-04

4.297e+00

Auger electron

1.92894e-04

2.432e+00

Auger electron

5.59170e-04

6.773e-01

Auger electron

1.50004e-03

3.948e-01

Auger electron

2.43305e-03

1.402e+00

Auger electron

2.90455e-03

2.628e-01

Auger electron

3.52233e-03

1.545e-02

Auger electron

6.60700e-03

1.484e-01

Conversion electron

7.33100e-03

7.321e-02

Conversion electron

1.02004e-02

3.340e-01

Auger electron

1.11930e-02

5.716e-02

Conversion electron

1.35356e-02

1.697e-01

Auger electron

1.69119e-02

2.032e-02

Auger electron

1.85820e-02

1.478e-02

Conversion electron

1.93060e-02

4.629e-02

Conversion electron

2.31680e-02

4.076e-02

Conversion electron

2.40854e-02

7.122e-02

Conversion electron

2.83750e-02

2.537e-02

Conversion electron

3.60604e-02

2.761e-02

Conversion electron

5.35860e-02

1.041e-01

Conversion electron

5.43100e-02

1.761e-02

Conversion electron

6.50460e-02

9.953e-02

Conversion electron

6.57700e-02

1.140e-02

Conversion electron

7.10644e-02

3.132e-02

Conversion electron

7.53540e-02

1.125e-02

Conversion electron

8.22030e-02

2.586e-02

Conversion electron

8.25244e-02

2.721e-02

Conversion electron

1.84230e-01

5.694e-02

Conversion electron

1.96060e-01

2.974e-01

Conversion electron

2.24700e-01

2.605e-02

Conversion electron

2.90402e-01

5.080e-02

Conversion electron

3.07880e-01

1.378e-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

 

 

 

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