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Radionuclide Dosimetric Data Sheets
Terbium-152m
Summary data
General
Classification
Isotope: Tb-152m
Atomic number (Z): 65
Mass number (A): 152
Neutron number (N): 87
Radioactive decay
Decay modes: β+, Electron capture, Internal
transition
Half-life: 4.2 [m]
Decay constant: 2.7506e-03 [1/s]
Daughters: Tb-152 (78.8%), Gd-152 (21.2%)
Radioactive daughters: Tb-152, Gd-152
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.15198 [MeV]
Mean photon energy: 0.76193 [MeV]
Air kerma rate constant, Γ10: 2.868e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.915e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.435e-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-:
2.435e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.221e-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-152m 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-152m 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-152m 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-152m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.38215e-05 |
1.344e+01 |
X-ray |
|
1.94295e-05 |
2.074e+00 |
X-ray |
|
1.16030e-03 |
2.296e-02 |
X-ray |
|
6.04290e-03 |
1.454e-02 |
X-ray |
|
6.22630e-03 |
1.072e-02 |
X-ray |
|
6.26069e-03 |
9.479e-02 |
X-ray |
|
6.98190e-03 |
7.901e-02 |
X-ray |
|
7.35101e-03 |
1.600e-02 |
X-ray |
|
8.10032e-03 |
1.380e-02 |
X-ray |
|
4.23559e-02 |
5.160e-02 |
X-ray |
|
4.30603e-02 |
9.278e-02 |
X-ray |
|
4.37992e-02 |
2.372e-01 |
X-ray |
|
4.45546e-02 |
4.251e-01 |
X-ray |
|
4.80000e-02 |
1.175e-02 |
Gamma |
|
4.87612e-02 |
1.824e-02 |
X-ray |
|
5.03066e-02 |
4.348e-02 |
X-ray |
|
5.04632e-02 |
8.410e-02 |
X-ray |
|
5.17791e-02 |
1.849e-02 |
X-ray |
|
5.89000e-02 |
7.218e-02 |
Gamma |
|
1.59590e-01 |
1.652e-01 |
Gamma |
|
2.35400e-01 |
4.235e-02 |
Gamma |
|
2.77200e-01 |
8.471e-02 |
Gamma |
|
2.83290e-01 |
5.965e-01 |
Gamma |
|
3.44260e-01 |
2.009e-01 |
Gamma |
|
3.51700e-01 |
1.823e-02 |
Gamma |
|
3.85900e-01 |
3.288e-02 |
Gamma |
|
4.11100e-01 |
1.817e-01 |
Gamma |
|
4.71900e-01 |
1.184e-01 |
Gamma |
|
5.11000e-01 |
2.439e-02 |
Annihilation photon |
|
5.19400e-01 |
4.723e-02 |
Gamma |
|
5.26800e-01 |
1.644e-02 |
Gamma |
|
5.32600e-01 |
4.304e-02 |
Gamma |
|
5.86200e-01 |
1.375e-02 |
Gamma |
|
6.47400e-01 |
4.304e-02 |
Gamma |
|
7.26000e-01 |
3.169e-02 |
Gamma |
|
1.10620e+00 |
2.810e-02 |
Gamma |
|
1.16690e+00 |
3.707e-02 |
Gamma |
|
1.68638e-05 |
1.394e-01 |
Auger electron |
|
1.73725e-05 |
7.975e-01 |
Auger electron |
|
1.13380e-04 |
9.331e-01 |
Auger electron |
|
1.21985e-04 |
6.138e+00 |
Auger electron |
|
1.23645e-04 |
7.674e-02 |
Auger electron |
|
1.34554e-04 |
3.813e-01 |
Auger electron |
|
1.82328e-04 |
1.458e-01 |
Auger electron |
|
1.99132e-04 |
9.709e-01 |
Auger electron |
|
5.72363e-04 |
2.939e-02 |
Auger electron |
|
6.03927e-04 |
1.755e-01 |
Auger electron |
|
8.97955e-04 |
3.143e-01 |
Auger electron |
|
9.61284e-04 |
2.091e+00 |
Auger electron |
|
1.07582e-03 |
2.134e-02 |
Auger electron |
|
1.13645e-03 |
1.188e-01 |
Auger electron |
|
4.77225e-03 |
1.156e-01 |
Auger electron |
|
4.96923e-03 |
7.489e-01 |
Auger electron |
|
5.92833e-03 |
4.053e-02 |
Auger electron |
|
6.17680e-03 |
2.619e-01 |
Auger electron |
|
6.84001e-03 |
6.377e-01 |
Conversion electron |
|
7.41840e-03 |
2.302e-02 |
Auger electron |
|
3.58945e-02 |
3.530e-02 |
Auger electron |
|
3.93269e-02 |
2.530e-02 |
Conversion electron |
|
4.25487e-02 |
1.756e-02 |
Auger electron |
|
5.02269e-02 |
8.525e-02 |
Conversion electron |
|
5.73032e-02 |
2.052e-02 |
Conversion electron |
|
1.07530e-01 |
1.852e-01 |
Conversion electron |
|
1.50917e-01 |
1.985e-02 |
Conversion electron |
|
1.51329e-01 |
2.031e-01 |
Conversion electron |
|
1.52085e-01 |
1.504e-01 |
Conversion electron |
|
1.57993e-01 |
9.193e-02 |
Conversion electron |
|
1.59590e-01 |
2.421e-02 |
Conversion electron |
|
2.31230e-01 |
3.334e-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
MIRDsoft MIRDspecs version 20250101 (www.mirdsoft.org)
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