<= Return to MIRDspec isotope database
Radionuclide Dosimetric Data Sheets
Barium-126
Summary data
General
Classification
Isotope: Ba-126
Atomic number (Z): 56
Mass number (A): 126
Neutron number (N): 70
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 100.0 [m]
Decay constant: 1.1552e-04 [1/s]
Daughters: Cs-126 (100.0%)
Radioactive daughters: Cs-126
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.01784 [MeV]
Mean photon energy: 0.58026 [MeV]
Air kerma rate constant, Γ10: 2.388e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.412e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.858e-15 [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-:
2.858e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 9.297e-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-126 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-126 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-126 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-126 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
2.18871e-05 |
1.207e+01 |
X-ray |
|
4.27312e-03 |
4.148e-02 |
X-ray |
|
4.61551e-03 |
2.425e-02 |
X-ray |
|
3.06218e-02 |
2.267e-01 |
X-ray |
|
3.09789e-02 |
4.186e-01 |
X-ray |
|
3.49256e-02 |
3.966e-02 |
X-ray |
|
3.49943e-02 |
7.687e-02 |
X-ray |
|
3.58172e-02 |
1.626e-02 |
X-ray |
|
2.17900e-01 |
4.070e-02 |
Gamma |
|
2.33600e-01 |
1.962e-01 |
Gamma |
|
2.41000e-01 |
5.983e-02 |
Gamma |
|
2.57600e-01 |
7.611e-02 |
Gamma |
|
2.81200e-01 |
3.053e-02 |
Gamma |
|
3.28300e-01 |
2.076e-02 |
Gamma |
|
4.00600e-01 |
1.140e-02 |
Gamma |
|
4.89300e-01 |
2.890e-02 |
Gamma |
|
5.11000e-01 |
1.259e-02 |
Annihilation photon |
|
5.38900e-01 |
1.954e-02 |
Gamma |
|
6.81800e-01 |
4.396e-02 |
Gamma |
|
7.09800e-01 |
1.506e-02 |
Gamma |
|
8.41600e-01 |
1.058e-02 |
Gamma |
|
8.63900e-01 |
1.465e-02 |
Gamma |
|
9.76800e-01 |
1.791e-02 |
Gamma |
|
9.84200e-01 |
1.140e-02 |
Gamma |
|
9.93400e-01 |
2.442e-02 |
Gamma |
|
1.03540e+00 |
1.628e-02 |
Gamma |
|
1.05200e+00 |
1.221e-02 |
Gamma |
|
1.21080e+00 |
1.832e-02 |
Gamma |
|
1.23440e+00 |
1.954e-02 |
Gamma |
|
1.24180e+00 |
1.058e-02 |
Gamma |
|
1.29300e+00 |
3.704e-02 |
Gamma |
|
2.09688e-05 |
1.611e+00 |
Auger electron |
|
4.14479e-05 |
5.728e+00 |
Auger electron |
|
1.19504e-04 |
7.067e-01 |
Auger electron |
|
3.33053e-04 |
1.411e-01 |
Auger electron |
|
5.28412e-04 |
1.572e+00 |
Auger electron |
|
6.53157e-04 |
1.031e-01 |
Auger electron |
|
3.44738e-03 |
6.179e-01 |
Auger electron |
|
4.16873e-03 |
1.906e-01 |
Auger electron |
|
4.91900e-03 |
1.468e-02 |
Auger electron |
|
2.53980e-02 |
5.945e-02 |
Auger electron |
|
2.98089e-02 |
2.702e-02 |
Auger electron |
|
1.97615e-01 |
1.480e-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
