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Radionuclide Dosimetric Data Sheets

Terbium-154

Summary data

General

Classification

Isotope:  Tb-154
Atomic number (Z):  65
Mass number (A):  154
Neutron number (N):  89

Radioactive decay

Decay modes:  β+, Electron capture
Half-life:  21.5 [h]
Decay constant:  8.9554e-06 [1/s]
Daughters:  Gd-154 (100.0%)
Radioactive daughters:  None

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.06809 [MeV]
Mean photon energy:  2.28313 [MeV]
Air kerma rate constant, Γ10:  7.232e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  7.332e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  1.091e-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-:  1.091e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  3.658e-13 [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/Tb-154 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/Tb-154 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/Tb-154 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/Tb-154 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

1.94293e-05

1.153e+01

X-ray

1.09470e-03

1.761e-02

X-ray

6.04290e-03

8.028e-02

X-ray

6.71540e-03

5.430e-02

X-ray

7.08640e-03

1.365e-02

X-ray

4.23559e-02

2.641e-01

X-ray

4.30603e-02

4.748e-01

X-ray

4.86161e-02

4.825e-02

X-ray

4.87612e-02

9.332e-02

X-ray

4.99916e-02

1.060e-02

X-ray

5.00239e-02

2.058e-02

X-ray

1.23070e-01

2.584e-01

Gamma

2.47940e-01

1.704e-02

Gamma

5.11000e-01

5.136e-02

Annihilation photon

5.36110e-01

1.314e-02

Gamma

5.57600e-01

5.396e-02

Gamma

6.92410e-01

3.181e-02

Gamma

7.04900e-01

4.757e-02

Gamma

7.22120e-01

7.668e-02

Gamma

8.73210e-01

5.254e-02

Gamma

8.78300e-01

2.805e-02

Gamma

9.96240e-01

4.899e-02

Gamma

1.11803e+00

2.414e-02

Gamma

1.12309e+00

5.680e-02

Gamma

1.24144e+00

2.769e-02

Gamma

1.27444e+00

1.051e-01

Gamma

1.29131e+00

6.887e-02

Gamma

1.32510e+00

1.171e-02

Gamma

1.41460e+00

1.917e-02

Gamma

1.45840e+00

1.548e-02

Gamma

1.90700e+00

1.321e-02

Gamma

1.90910e+00

1.321e-02

Gamma

1.99661e+00

7.455e-02

Gamma

2.04191e+00

1.953e-02

Gamma

2.06411e+00

7.100e-02

Gamma

2.11968e+00

4.189e-02

Gamma

2.18710e+00

9.940e-02

Gamma

2.30749e+00

1.448e-02

Gamma

2.34250e+00

1.484e-02

Gamma

2.34530e+00

1.484e-02

Gamma

2.43050e+00

2.158e-02

Gamma

2.48624e+00

1.321e-02

Gamma

1.14763e+00

1.603e-02

Positron

1.68638e-05

7.740e-01

Auger electron

1.13393e-04

5.186e+00

Auger electron

1.23464e-04

4.273e-01

Auger electron

1.82687e-04

8.094e-01

Auger electron

5.68555e-04

1.575e-01

Auger electron

8.97968e-04

1.751e+00

Auger electron

1.07572e-03

1.188e-01

Auger electron

4.77336e-03

6.421e-01

Auger electron

5.92919e-03

2.252e-01

Auger electron

7.11953e-03

1.956e-02

Auger electron

3.47387e-02

4.119e-02

Auger electron

4.11460e-02

2.039e-02

Auger electron

7.27670e-02

1.688e-01

Conversion electron

1.14720e-01

1.604e-02

Conversion electron

1.15123e-01

4.694e-02

Conversion electron

1.15827e-01

4.506e-02

Conversion electron

1.21528e-01

2.537e-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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