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Radionuclide Dosimetric Data Sheets
Barium-140
Summary data
General
Classification
Isotope: Ba-140
Atomic number (Z): 56
Mass number (A): 140
Neutron number (N): 84
Radioactive decay
Decay modes: β-
Half-life: 12.75 [d]
Decay constant: 6.2912e-07 [1/s]
Daughters: La-140 (100.0%)
Radioactive daughters: La-140
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.32022 [MeV]
Mean photon energy: 0.18264 [MeV]
Air kerma rate constant, Γ10: 7.898e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 7.898e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 5.131e-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-:
5.131e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.926e-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/Ba-140 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-140 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-140 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-140 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
2.10428e-05 |
1.951e+01 |
X-ray |
|
4.63652e-03 |
3.495e-02 |
X-ray |
|
5.03700e-03 |
1.726e-02 |
X-ray |
|
5.03753e-03 |
2.872e-02 |
X-ray |
|
5.11912e-03 |
2.648e-02 |
X-ray |
|
1.38460e-02 |
1.219e-02 |
Gamma |
|
2.99660e-02 |
1.410e-01 |
Gamma |
|
3.34591e-02 |
1.044e-02 |
X-ray |
|
1.62660e-01 |
6.219e-02 |
Gamma |
|
3.04849e-01 |
4.293e-02 |
Gamma |
|
4.23722e-01 |
3.151e-02 |
Gamma |
|
4.37575e-01 |
1.929e-02 |
Gamma |
|
5.37261e-01 |
2.439e-01 |
Gamma |
|
1.40640e-01 |
2.391e-01 |
Beta |
|
1.80919e-01 |
9.345e-02 |
Beta |
|
3.10206e-01 |
4.441e-02 |
Beta |
|
3.44481e-01 |
3.818e-01 |
Beta |
|
3.61551e-01 |
2.412e-01 |
Beta |
|
1.18532e-05 |
3.444e+00 |
Auger electron |
|
3.33700e-05 |
2.837e-02 |
Auger electron |
|
6.13190e-05 |
6.676e+00 |
Auger electron |
|
6.24412e-05 |
2.324e+00 |
Auger electron |
|
1.17058e-04 |
1.146e+00 |
Auger electron |
|
4.05109e-04 |
6.167e-01 |
Auger electron |
|
5.86607e-04 |
1.973e+00 |
Auger electron |
|
7.46032e-04 |
1.740e-01 |
Auger electron |
|
3.86287e-03 |
7.686e-01 |
Auger electron |
|
4.69511e-03 |
2.574e-01 |
Auger electron |
|
5.57132e-03 |
2.097e-02 |
Auger electron |
|
7.60420e-03 |
4.803e-01 |
Conversion electron |
|
7.94350e-03 |
4.772e-02 |
Conversion electron |
|
8.36220e-03 |
1.635e-02 |
Conversion electron |
|
1.27233e-02 |
1.135e-01 |
Conversion electron |
|
1.38460e-02 |
3.140e-02 |
Conversion electron |
|
2.37242e-02 |
5.603e-01 |
Conversion electron |
|
2.40635e-02 |
4.842e-02 |
Conversion electron |
|
2.44822e-02 |
1.177e-02 |
Conversion electron |
|
2.88433e-02 |
1.292e-01 |
Conversion electron |
|
2.99660e-02 |
3.578e-02 |
Conversion electron |
|
1.23717e-01 |
1.497e-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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