<= Return to MIRDspec isotope database
Radionuclide Dosimetric Data Sheets
Terbium-151m
Summary data
General
Classification
Isotope: Tb-151m
Atomic number (Z): 65
Mass number (A): 151
Neutron number (N): 86
Radioactive decay
Decay modes: β+, Electron capture, Internal
transition
Half-life: 25.0 [s]
Decay constant: 2.7726e-02 [1/s]
Daughters: Tb-151 (93.4%), Gd-151 (6.6%)
Radioactive daughters: Tb-151, Gd-151
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.07927 [MeV]
Mean photon energy: 0.08079 [MeV]
Air kerma rate constant, Γ10: 3.390e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.453e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.270e-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-:
1.270e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.294e-14
[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-151m 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-151m 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-151m 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-151m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.38853e-05 |
2.239e+01 |
X-ray |
|
1.94298e-05 |
6.154e-01 |
X-ray |
|
1.16644e-03 |
3.514e-02 |
X-ray |
|
6.22629e-03 |
1.263e-02 |
X-ray |
|
6.26070e-03 |
1.116e-01 |
X-ray |
|
6.91969e-03 |
2.630e-02 |
X-ray |
|
6.98190e-03 |
9.901e-02 |
X-ray |
|
7.07629e-03 |
3.710e-02 |
X-ray |
|
7.35101e-03 |
1.884e-02 |
X-ray |
|
8.10032e-03 |
1.729e-02 |
X-ray |
|
2.29200e-02 |
3.138e-02 |
Gamma |
|
4.23559e-02 |
1.534e-02 |
X-ray |
|
4.30603e-02 |
2.757e-02 |
X-ray |
|
4.94600e-02 |
2.242e-01 |
Gamma |
|
3.79700e-01 |
6.313e-02 |
Gamma |
|
5.22400e-01 |
1.517e-02 |
Gamma |
|
8.30500e-01 |
3.302e-02 |
Gamma |
|
1.68638e-05 |
4.137e-02 |
Auger electron |
|
1.73725e-05 |
1.381e+00 |
Auger electron |
|
4.15900e-05 |
1.081e-02 |
Auger electron |
|
1.13377e-04 |
2.769e-01 |
Auger electron |
|
1.21593e-04 |
1.027e+01 |
Auger electron |
|
1.23705e-04 |
2.277e-02 |
Auger electron |
|
1.40996e-04 |
6.481e-01 |
Auger electron |
|
1.82293e-04 |
4.329e-02 |
Auger electron |
|
2.00632e-04 |
1.790e+00 |
Auger electron |
|
6.46324e-04 |
6.846e-01 |
Auger electron |
|
8.97990e-04 |
9.319e-02 |
Auger electron |
|
9.66424e-04 |
3.182e+00 |
Auger electron |
|
1.15021e-03 |
1.840e-01 |
Auger electron |
|
4.77277e-03 |
3.426e-02 |
Auger electron |
|
5.09802e-03 |
1.123e+00 |
Auger electron |
|
5.92896e-03 |
1.201e-02 |
Auger electron |
|
6.32117e-03 |
3.956e-01 |
Auger electron |
|
7.58548e-03 |
3.509e-02 |
Auger electron |
|
1.42469e-02 |
5.989e-01 |
Conversion electron |
|
1.46591e-02 |
7.323e-02 |
Conversion electron |
|
1.54147e-02 |
3.495e-02 |
Conversion electron |
|
1.88391e-02 |
2.986e-01 |
Conversion electron |
|
1.95947e-02 |
3.829e-01 |
Conversion electron |
|
2.13232e-02 |
1.553e-01 |
Conversion electron |
|
2.29200e-02 |
4.353e-02 |
Conversion electron |
|
2.55032e-02 |
1.963e-01 |
Conversion electron |
|
2.71000e-02 |
5.176e-02 |
Conversion electron |
|
4.07869e-02 |
4.408e-01 |
Conversion electron |
|
4.11991e-02 |
5.006e-02 |
Conversion electron |
|
4.19547e-02 |
2.062e-02 |
Conversion electron |
|
4.78632e-02 |
1.124e-01 |
Conversion electron |
|
4.94600e-02 |
3.141e-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)
<= Return to MIRDspec isotope database
