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Radionuclide Dosimetric Data Sheets

Praseodymium-136

Isotope:  Pr-136
Atomic number (Z):  59
Mass number (A):  136
Neutron number (N):  77

Decay modes:  β+, Electron capture
Half-life:  13.1 [m]
Decay constant:  8.8187e-04 [1/s]
Daughters:  Ce-136 (100.0%)
Radioactive daughters:  None

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.75448 [MeV]
Mean photon energy:  2.14584 [MeV]
Air kerma rate constant, Γ₁₀:  5.512e-17 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  7.724e-17 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  1.209e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δ_α:  0.000e+00 [Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δ_β-,β+,e-:  1.209e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  3.438e-13 [Gy·kg/Bq·s]

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/Pr-136 DPK.csv

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-136 Summary Spectrum.csv

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-136 Beta Spectrum.csv

 

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-136 Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
1.61262e-05	5.171e+00	X-ray
4.82666e-03	2.069e-02	X-ray
5.25981e-03	1.244e-02	X-ray
3.42907e-02	9.802e-02	X-ray
3.47432e-02	1.795e-01	X-ray
3.91962e-02	1.745e-02	X-ray
3.92855e-02	3.380e-02	X-ray
4.61000e-01	7.650e-02	Gamma
5.11000e-01	1.143e+00	Annihilation photon
5.39750e-01	5.240e-01	Gamma
5.52160e-01	7.598e-01	Gamma
7.61000e-01	1.467e-02	Gamma
1.00070e+00	5.030e-02	Gamma
1.09230e+00	1.855e-01	Gamma
1.51500e+00	1.939e-02	Gamma
1.60270e+00	3.930e-02	Gamma
2.06720e+00	2.987e-02	Gamma
8.77245e-01	1.499e-02	Positron
9.17019e-01	2.199e-02	Positron
1.15182e+00	7.096e-02	Positron
1.36461e+00	4.038e-01	Positron
1.61612e+00	4.098e-02	Positron
1.22653e-05	7.347e-01	Auger electron
6.25448e-05	7.982e-01	Auger electron
7.40114e-05	1.737e+00	Auger electron
1.35108e-04	2.714e-01	Auger electron
3.89069e-04	5.798e-02	Auger electron
6.26813e-04	6.382e-01	Auger electron
7.79419e-04	4.627e-02	Auger electron
3.85076e-03	2.465e-01	Auger electron
4.70733e-03	8.118e-02	Auger electron
2.83189e-02	2.119e-02	Auger electron

 

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

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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