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Radionuclide Dosimetric Data Sheets
Barium-124
Summary data
General
Classification
Isotope: Ba-124
Atomic number (Z): 56
Mass number (A): 124
Neutron number (N): 68
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 11.0 [m]
Decay constant: 1.0502e-03 [1/s]
Daughters: Cs-124 (100.0%)
Radioactive daughters: Cs-124
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.17433 [MeV]
Mean photon energy: 0.57278 [MeV]
Air kerma rate constant, Γ10: 1.593e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.399e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.793e-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-:
2.793e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 9.177e-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-124 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-124 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-124 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-124 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
2.18866e-05 |
1.268e+01 |
X-ray |
|
4.27312e-03 |
4.389e-02 |
X-ray |
|
4.61551e-03 |
2.636e-02 |
X-ray |
|
3.06218e-02 |
2.192e-01 |
X-ray |
|
3.09789e-02 |
4.048e-01 |
X-ray |
|
3.49256e-02 |
3.835e-02 |
X-ray |
|
3.49944e-02 |
7.433e-02 |
X-ray |
|
3.58172e-02 |
1.573e-02 |
X-ray |
|
1.69500e-01 |
1.106e-01 |
Gamma |
|
1.89000e-01 |
6.576e-02 |
Gamma |
|
2.11600e-01 |
2.208e-02 |
Gamma |
|
2.53250e-01 |
2.904e-02 |
Gamma |
|
2.70300e-01 |
1.742e-02 |
Gamma |
|
2.72200e-01 |
1.848e-02 |
Gamma |
|
4.01600e-01 |
1.056e-02 |
Gamma |
|
4.73700e-01 |
1.080e-02 |
Gamma |
|
5.11000e-01 |
4.167e-01 |
Annihilation photon |
|
7.51700e-01 |
1.584e-02 |
Gamma |
|
1.21670e+00 |
4.080e-02 |
Gamma |
|
6.53913e-01 |
2.204e-02 |
Positron |
|
7.29881e-01 |
1.703e-01 |
Positron |
|
2.08943e-05 |
1.688e+00 |
Auger electron |
|
4.14365e-05 |
6.021e+00 |
Auger electron |
|
1.19666e-04 |
7.390e-01 |
Auger electron |
|
3.26073e-04 |
1.384e-01 |
Auger electron |
|
5.28228e-04 |
1.659e+00 |
Auger electron |
|
6.52637e-04 |
1.087e-01 |
Auger electron |
|
3.44447e-03 |
6.511e-01 |
Auger electron |
|
4.16527e-03 |
2.008e-01 |
Auger electron |
|
4.91457e-03 |
1.546e-02 |
Auger electron |
|
7.71500e-03 |
2.584e-02 |
Conversion electron |
|
1.78650e-02 |
4.394e-02 |
Conversion electron |
|
2.53980e-02 |
5.749e-02 |
Auger electron |
|
2.98089e-02 |
2.613e-02 |
Auger electron |
|
3.35150e-02 |
1.647e-02 |
Conversion electron |
|
3.83368e-02 |
3.142e-02 |
Conversion electron |
|
3.86939e-02 |
4.223e-02 |
Conversion electron |
|
4.27093e-02 |
1.670e-02 |
Conversion electron |
|
1.33515e-01 |
2.118e-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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