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Radionuclide Dosimetric Data Sheets
Barium-141
Summary data
General
Classification
Isotope: Ba-141
Atomic number (Z): 56
Mass number (A): 141
Neutron number (N): 85
Radioactive decay
Decay modes: β-
Half-life: 18.27 [m]
Decay constant: 6.3232e-04 [1/s]
Daughters: La-141 (100.0%)
Radioactive daughters: La-141
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.96241 [MeV]
Mean photon energy: 0.9271 [MeV]
Air kerma rate constant, Γ10: 3.292e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.292e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.542e-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-:
1.542e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.485e-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/Ba-141 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/Ba-141 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/Ba-141 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/Ba-141 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
2.10723e-05 |
1.670e+00 |
X-ray |
|
3.30405e-02 |
3.004e-02 |
X-ray |
|
3.34591e-02 |
5.517e-02 |
X-ray |
|
3.78202e-02 |
1.030e-02 |
X-ray |
|
1.12800e-01 |
1.012e-02 |
Gamma |
|
1.90328e-01 |
4.600e-01 |
Gamma |
|
2.76950e-01 |
2.341e-01 |
Gamma |
|
3.04190e-01 |
2.544e-01 |
Gamma |
|
3.43670e-01 |
1.444e-01 |
Gamma |
|
3.90000e-01 |
1.334e-02 |
Gamma |
|
4.57800e-01 |
5.014e-02 |
Gamma |
|
4.62300e-01 |
4.876e-02 |
Gamma |
|
4.67500e-01 |
5.704e-02 |
Gamma |
|
6.25400e-01 |
3.588e-02 |
Gamma |
|
6.48100e-01 |
6.302e-02 |
Gamma |
|
7.39200e-01 |
4.830e-02 |
Gamma |
|
8.31700e-01 |
1.615e-02 |
Gamma |
|
8.76300e-01 |
3.680e-02 |
Gamma |
|
1.16080e+00 |
1.104e-02 |
Gamma |
|
1.19730e+00 |
4.784e-02 |
Gamma |
|
1.68230e+00 |
1.702e-02 |
Gamma |
|
4.69249e-01 |
1.919e-02 |
Beta |
|
4.91997e-01 |
4.545e-02 |
Beta |
|
5.04171e-01 |
2.929e-02 |
Beta |
|
5.48687e-01 |
2.121e-02 |
Beta |
|
5.97608e-01 |
3.232e-02 |
Beta |
|
6.53103e-01 |
6.868e-02 |
Beta |
|
7.99752e-01 |
1.616e-02 |
Beta |
|
8.47342e-01 |
3.939e-02 |
Beta |
|
9.09427e-01 |
1.313e-01 |
Beta |
|
9.53784e-01 |
2.222e-02 |
Beta |
|
1.03775e+00 |
2.525e-01 |
Beta |
|
1.12059e+00 |
1.767e-01 |
Beta |
|
1.24827e+00 |
7.373e-02 |
Beta |
|
1.32031e+00 |
4.444e-02 |
Beta |
|
1.18532e-05 |
2.919e-01 |
Auger electron |
|
6.07121e-05 |
5.817e-01 |
Auger electron |
|
6.29320e-05 |
1.840e-01 |
Auger electron |
|
1.17828e-04 |
8.201e-02 |
Auger electron |
|
3.53776e-04 |
1.743e-02 |
Auger electron |
|
5.79482e-04 |
1.955e-01 |
Auger electron |
|
7.29881e-04 |
1.686e-02 |
Auger electron |
|
3.69567e-03 |
7.689e-02 |
Auger electron |
|
4.50915e-03 |
2.543e-02 |
Auger electron |
|
1.51385e-01 |
7.208e-02 |
Conversion electron |
|
2.38007e-01 |
1.342e-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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