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Radionuclide Dosimetric Data Sheets
Iodine-134
Summary data
General
Classification
Isotope: I-134
Atomic number (Z): 53
Mass number (A): 134
Neutron number (N): 81
Radioactive decay
Decay modes: β-
Half-life: 52.5 [m]
Decay constant: 2.2005e-04 [1/s]
Daughters: Xe-134 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.57758 [MeV]
Mean photon energy: 2.59534 [MeV]
Air kerma rate constant, Γ10: 9.297e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 9.297e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 9.254e-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-:
9.254e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.158e-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/I-134 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/I-134 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/I-134 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/I-134 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.66176e-05 |
3.925e-01 |
X-ray |
|
2.97812e-02 |
1.346e-02 |
X-ray |
|
1.35399e-01 |
4.293e-02 |
Gamma |
|
2.35471e-01 |
2.127e-02 |
Gamma |
|
4.05451e-01 |
7.346e-02 |
Gamma |
|
4.33350e-01 |
4.140e-02 |
Gamma |
|
4.58920e-01 |
1.307e-02 |
Gamma |
|
4.88880e-01 |
1.450e-02 |
Gamma |
|
5.14400e-01 |
2.232e-02 |
Gamma |
|
5.40825e-01 |
7.632e-02 |
Gamma |
|
5.95362e-01 |
1.107e-01 |
Gamma |
|
6.21790e-01 |
1.059e-01 |
Gamma |
|
6.27960e-01 |
2.213e-02 |
Gamma |
|
6.77340e-01 |
7.918e-02 |
Gamma |
|
7.30740e-01 |
1.822e-02 |
Gamma |
|
7.66680e-01 |
4.140e-02 |
Gamma |
|
8.47025e-01 |
9.540e-01 |
Gamma |
|
8.57290e-01 |
6.678e-02 |
Gamma |
|
8.84090e-01 |
6.487e-01 |
Gamma |
|
9.47860e-01 |
3.997e-02 |
Gamma |
|
9.74670e-01 |
4.770e-02 |
Gamma |
|
1.04025e+00 |
2.022e-02 |
Gamma |
|
1.07255e+00 |
1.488e-01 |
Gamma |
|
1.13616e+00 |
9.063e-02 |
Gamma |
|
1.45524e+00 |
2.290e-02 |
Gamma |
|
1.61380e+00 |
4.293e-02 |
Gamma |
|
1.74149e+00 |
2.557e-02 |
Gamma |
|
1.80684e+00 |
5.533e-02 |
Gamma |
|
2.17740e-01 |
1.770e-02 |
Beta |
|
2.23383e-01 |
1.078e-02 |
Beta |
|
3.32068e-01 |
1.335e-02 |
Beta |
|
4.21410e-01 |
3.006e-01 |
Beta |
|
5.12265e-01 |
6.824e-02 |
Beta |
|
5.40556e-01 |
1.602e-01 |
Beta |
|
5.58333e-01 |
4.055e-02 |
Beta |
|
6.19235e-01 |
6.527e-02 |
Beta |
|
6.43745e-01 |
1.088e-01 |
Beta |
|
6.66217e-01 |
2.215e-02 |
Beta |
|
6.79651e-01 |
1.582e-02 |
Beta |
|
8.37946e-01 |
3.264e-02 |
Beta |
|
9.23648e-01 |
1.236e-01 |
Beta |
|
2.61556e-05 |
6.112e-02 |
Auger electron |
|
3.62375e-05 |
1.867e-01 |
Auger electron |
|
1.23766e-04 |
2.294e-02 |
Auger electron |
|
5.05048e-04 |
5.127e-02 |
Auger electron |
|
3.32408e-03 |
2.022e-02 |
Auger electron |
|
1.00843e-01 |
1.313e-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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