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Radionuclide Dosimetric Data Sheets

Terbium-150m

Isotope:  Tb-150m
Atomic number (Z):  65
Mass number (A):  150
Neutron number (N):  85

Decay modes:  β+, Electron capture
Half-life:  5.8 [m]
Decay constant:  1.9918e-03 [1/s]
Daughters:  Gd-150 (100.0%)
Radioactive daughters:  Gd-150

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.12671 [MeV]
Mean photon energy:  2.52024 [MeV]
Air kerma rate constant, Γ₁₀:  9.013e-17 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  9.544e-17 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  2.030e-14 [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-:  2.030e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  4.038e-13 [Gy·kg/Bq·s]

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/Tb-150m 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/Tb-150m 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/Tb-150m Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
1.94295e-05	8.536e+00	X-ray
1.09477e-03	1.301e-02	X-ray
6.04290e-03	5.988e-02	X-ray
6.71540e-03	3.868e-02	X-ray
7.08640e-03	1.018e-02	X-ray
4.23559e-02	2.131e-01	X-ray
4.30603e-02	3.831e-01	X-ray
4.86161e-02	3.893e-02	X-ray
4.87612e-02	7.530e-02	X-ray
5.00239e-02	1.661e-02	X-ray
1.54100e-01	1.000e-02	Gamma
1.62000e-01	7.300e-02	Gamma
1.79400e-01	1.400e-02	Gamma
1.80900e-01	1.400e-02	Gamma
2.74900e-01	1.900e-02	Gamma
3.43070e-01	2.500e-01	Gamma
4.12400e-01	9.800e-02	Gamma
4.15300e-01	4.000e-02	Gamma
4.38370e-01	4.200e-01	Gamma
4.55700e-01	1.200e-01	Gamma
4.96300e-01	2.350e-01	Gamma
5.10000e-01	2.500e-01	Gamma
5.11000e-01	2.741e-01	Annihilation photon
5.66520e-01	2.200e-01	Gamma
6.38050e-01	1.000e+00	Gamma
6.48400e-01	1.850e-01	Gamma
6.50400e-01	7.000e-01	Gamma
7.89900e-01	2.300e-02	Gamma
8.27480e-01	4.100e-01	Gamma
6.95037e-01	1.352e-01	Positron
1.68638e-05	5.737e-01	Auger electron
1.13380e-04	3.840e+00	Auger electron
1.23656e-04	3.158e-01	Auger electron
1.82299e-04	5.999e-01	Auger electron
5.72570e-04	1.211e-01	Auger electron
8.97952e-04	1.294e+00	Auger electron
1.07582e-03	8.783e-02	Auger electron
4.77202e-03	4.756e-01	Auger electron
5.92810e-03	1.668e-01	Auger electron
7.11885e-03	1.449e-02	Auger electron
3.47386e-02	3.324e-02	Auger electron
4.11460e-02	1.646e-02	Auger electron
1.11697e-01	3.261e-02	Conversion 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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