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Radionuclide Dosimetric Data Sheets
Terbium-148
Summary data
General
Classification
Isotope: Tb-148
Atomic number (Z): 65
Mass number (A): 148
Neutron number (N): 83
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 60.0 [m]
Decay constant: 1.9254e-04 [1/s]
Daughters: Gd-148 (100.0%)
Radioactive daughters: Gd-148
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.84113 [MeV]
Mean photon energy: 2.359 [MeV]
Air kerma rate constant, Γ10: 6.155e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 8.231e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.348e-13 [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-:
1.348e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 3.780e-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-148 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-148 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-148 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-148 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.94295e-05 |
4.250e+00 |
X-ray |
|
6.04290e-03 |
2.982e-02 |
X-ray |
|
6.71540e-03 |
1.922e-02 |
X-ray |
|
4.23559e-02 |
1.063e-01 |
X-ray |
|
4.30603e-02 |
1.911e-01 |
X-ray |
|
4.86161e-02 |
1.942e-02 |
X-ray |
|
4.87612e-02 |
3.756e-02 |
X-ray |
|
4.89049e-01 |
1.974e-01 |
Gamma |
|
5.11000e-01 |
1.072e+00 |
Annihilation photon |
|
6.31947e-01 |
1.063e-01 |
Gamma |
|
6.39470e-01 |
2.638e-02 |
Gamma |
|
7.84430e-01 |
8.400e-01 |
Gamma |
|
9.60090e-01 |
1.075e-02 |
Gamma |
|
9.60090e-01 |
1.075e-02 |
Gamma |
|
1.07903e+00 |
1.142e-01 |
Gamma |
|
1.08941e+00 |
2.251e-02 |
Gamma |
|
1.40422e+00 |
2.134e-02 |
Gamma |
|
1.59939e+00 |
1.075e-02 |
Gamma |
|
1.71963e+00 |
1.453e-02 |
Gamma |
|
1.83014e+00 |
1.823e-02 |
Gamma |
|
1.86339e+00 |
5.620e-02 |
Gamma |
|
2.13114e+00 |
1.210e-02 |
Gamma |
|
2.18865e+00 |
1.714e-02 |
Gamma |
|
2.31103e+00 |
1.159e-02 |
Gamma |
|
1.15409e+00 |
1.848e-02 |
Positron |
|
1.27574e+00 |
1.059e-02 |
Positron |
|
1.30301e+00 |
9.420e-02 |
Positron |
|
1.49743e+00 |
2.807e-02 |
Positron |
|
1.57542e+00 |
6.293e-02 |
Positron |
|
1.80319e+00 |
2.168e-01 |
Positron |
|
2.13998e+00 |
3.296e-02 |
Positron |
|
1.68638e-05 |
2.856e-01 |
Auger electron |
|
1.13379e-04 |
1.912e+00 |
Auger electron |
|
1.23672e-04 |
1.572e-01 |
Auger electron |
|
1.82283e-04 |
2.988e-01 |
Auger electron |
|
5.72782e-04 |
6.043e-02 |
Auger electron |
|
8.97958e-04 |
6.439e-01 |
Auger electron |
|
1.07584e-03 |
4.372e-02 |
Auger electron |
|
4.77200e-03 |
2.368e-01 |
Auger electron |
|
5.92809e-03 |
8.303e-02 |
Auger electron |
|
3.47387e-02 |
1.658e-02 |
Auger 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
MIRDsoft MIRDspecs version 20250101 (www.mirdsoft.org)
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