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Radionuclide Dosimetric Data Sheets

Praseodymium-135

Summary data

General

Classification

Isotope:  Pr-135
Atomic number (Z):  59
Mass number (A):  135
Neutron number (N):  76

Radioactive decay

Decay modes:  β+, Electron capture
Half-life:  24.0 [m]
Decay constant:  4.8135e-04 [1/s]
Daughters:  Ce-135 (100.0%)
Radioactive daughters:  Ce-135

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.57931 [MeV]
Mean photon energy:  0.87411 [MeV]
Air kerma rate constant, Γ10:  1.513e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  3.438e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  9.282e-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-:  9.282e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  1.400e-13 [Gy·kg/Bq·s]

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/Pr-135 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/Pr-135 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/Pr-135 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

1.61263e-05

1.128e+01

X-ray

4.82666e-03

4.524e-02

X-ray

5.25981e-03

2.733e-02

X-ray

3.42907e-02

2.145e-01

X-ray

3.47432e-02

3.928e-01

X-ray

3.91962e-02

3.818e-02

X-ray

3.92855e-02

7.398e-02

X-ray

4.02466e-02

1.582e-02

X-ray

8.26400e-02

1.365e-01

Gamma

2.13450e-01

1.300e-01

Gamma

2.96120e-01

2.405e-01

Gamma

2.96120e-01

3.250e-02

Gamma

4.84300e-01

1.040e-02

Gamma

5.11000e-01

9.945e-01

Annihilation photon

5.38200e-01

8.060e-02

Gamma

6.13800e-01

1.781e-02

Gamma

6.20900e-01

1.560e-02

Gamma

6.97500e-01

1.365e-02

Gamma

6.97500e-01

1.365e-02

Gamma

8.06900e-01

1.170e-02

Gamma

8.49052e-01

1.103e-02

Positron

9.21222e-01

4.012e-02

Positron

1.06925e+00

1.203e-01

Positron

1.06926e+00

7.722e-02

Positron

1.16715e+00

1.605e-01

Positron

1.20519e+00

7.020e-02

Positron

1.22653e-05

1.604e+00

Auger electron

3.21300e-05

1.313e-02

Auger electron

6.25317e-05

1.742e+00

Auger electron

7.40144e-05

3.790e+00

Auger electron

1.35150e-04

5.911e-01

Auger electron

3.88045e-04

1.253e-01

Auger electron

6.26758e-04

1.394e+00

Auger electron

7.79278e-04

1.010e-01

Auger electron

3.85025e-03

5.387e-01

Auger electron

4.70673e-03

1.774e-01

Auger electron

5.59557e-03

1.432e-02

Auger electron

2.83188e-02

4.638e-02

Auger electron

3.33488e-02

2.186e-02

Auger electron

4.21840e-02

3.603e-01

Conversion electron

7.61267e-02

4.527e-02

Conversion electron

8.14695e-02

1.039e-02

Conversion electron

1.72994e-01

1.622e-02

Conversion electron

2.55664e-01

1.255e-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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