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Radionuclide Dosimetric Data Sheets
Barium-142
Summary data
General
Classification
Isotope: Ba-142
Atomic number (Z): 56
Mass number (A): 142
Neutron number (N): 86
Radioactive decay
Decay modes: β-
Half-life: 10.6 [m]
Decay constant: 1.0899e-03 [1/s]
Daughters: La-142 (100.0%)
Radioactive daughters: La-142
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.4141 [MeV]
Mean photon energy: 1.04693 [MeV]
Air kerma rate constant, Γ10: 3.786e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.786e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 6.635e-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-:
6.635e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.677e-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-142 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-142 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-142 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-142 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
2.10725e-05 |
3.764e+00 |
X-ray |
|
4.63652e-03 |
1.361e-02 |
X-ray |
|
3.30405e-02 |
6.572e-02 |
X-ray |
|
3.34591e-02 |
1.207e-01 |
X-ray |
|
3.77381e-02 |
1.163e-02 |
X-ray |
|
3.78203e-02 |
2.254e-02 |
X-ray |
|
7.75940e-02 |
9.775e-02 |
Gamma |
|
1.77000e-01 |
1.726e-02 |
Gamma |
|
2.31611e-01 |
1.214e-01 |
Gamma |
|
2.55300e-01 |
2.052e-01 |
Gamma |
|
2.86300e-01 |
1.101e-02 |
Gamma |
|
3.09200e-01 |
2.583e-02 |
Gamma |
|
3.35000e-01 |
1.466e-02 |
Gamma |
|
3.63960e-01 |
4.736e-02 |
Gamma |
|
4.25040e-01 |
5.719e-02 |
Gamma |
|
4.32300e-01 |
1.024e-02 |
Gamma |
|
5.99800e-01 |
1.841e-02 |
Gamma |
|
8.40400e-01 |
3.608e-02 |
Gamma |
|
8.95200e-01 |
1.386e-01 |
Gamma |
|
9.49100e-01 |
1.060e-01 |
Gamma |
|
1.00120e+00 |
9.717e-02 |
Gamma |
|
1.07870e+00 |
1.146e-01 |
Gamma |
|
1.09410e+00 |
2.808e-02 |
Gamma |
|
1.12680e+00 |
1.496e-02 |
Gamma |
|
1.20240e+00 |
5.535e-02 |
Gamma |
|
1.20430e+00 |
1.423e-01 |
Gamma |
|
1.38020e+00 |
3.403e-02 |
Gamma |
|
2.45733e-01 |
1.585e-01 |
Beta |
|
3.45885e-01 |
4.733e-01 |
Beta |
|
3.97393e-01 |
2.264e-01 |
Beta |
|
6.75345e-01 |
4.425e-02 |
Beta |
|
6.78579e-01 |
5.557e-02 |
Beta |
|
7.54041e-01 |
3.602e-02 |
Beta |
|
1.18532e-05 |
6.576e-01 |
Auger electron |
|
6.07094e-05 |
1.311e+00 |
Auger electron |
|
6.29367e-05 |
4.144e-01 |
Auger electron |
|
1.17874e-04 |
1.847e-01 |
Auger electron |
|
3.52641e-04 |
3.885e-02 |
Auger electron |
|
5.79464e-04 |
4.408e-01 |
Auger electron |
|
7.29826e-04 |
3.801e-02 |
Auger electron |
|
3.69532e-03 |
1.733e-01 |
Auger electron |
|
4.50871e-03 |
5.730e-02 |
Auger electron |
|
2.73123e-02 |
1.510e-02 |
Auger electron |
|
3.86510e-02 |
1.915e-01 |
Conversion electron |
|
7.13522e-02 |
2.385e-02 |
Conversion electron |
|
1.92668e-01 |
1.119e-02 |
Conversion electron |
|
2.16357e-01 |
1.449e-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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