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Radionuclide Dosimetric Data Sheets
Rhenium-184m
Summary data
General
Classification
Isotope: Re-184m
Atomic number (Z): 75
Mass number (A): 184
Neutron number (N): 109
Radioactive decay
Decay modes: Electron capture, Internal transition
Half-life: 169.0 [d]
Decay constant: 4.7471e-08 [1/s]
Daughters: Re-184 (75.4%), W-184 (24.6%)
Radioactive daughters: Re-184
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.14129 [MeV]
Mean photon energy: 0.38358 [MeV]
Air kerma rate constant, Γ10: 2.007e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.007e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.264e-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-:
2.264e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 6.146e-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/Re-184m 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/Re-184m Summary 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/Re-184m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
3.11994e-05 |
6.181e+00 |
X-ray |
|
3.75940e-05 |
1.067e+01 |
X-ray |
|
1.77725e-03 |
2.269e-02 |
X-ray |
|
1.84562e-03 |
4.299e-02 |
X-ray |
|
7.62640e-03 |
1.063e-02 |
X-ray |
|
8.38983e-03 |
6.989e-02 |
X-ray |
|
8.57621e-03 |
1.817e-02 |
X-ray |
|
8.64531e-03 |
1.603e-01 |
X-ray |
|
9.69189e-03 |
4.879e-02 |
X-ray |
|
9.95867e-03 |
1.239e-02 |
X-ray |
|
1.00312e-02 |
5.073e-02 |
X-ray |
|
1.02735e-02 |
2.873e-02 |
X-ray |
|
5.52780e-02 |
2.308e-02 |
Gamma |
|
5.81161e-02 |
8.308e-02 |
X-ray |
|
5.94830e-02 |
1.442e-01 |
X-ray |
|
5.98631e-02 |
1.440e-01 |
X-ray |
|
6.13181e-02 |
2.490e-01 |
X-ray |
|
6.71212e-02 |
1.551e-02 |
X-ray |
|
6.74178e-02 |
2.997e-02 |
X-ray |
|
6.91788e-02 |
2.691e-02 |
X-ray |
|
6.94956e-02 |
5.200e-02 |
X-ray |
|
7.14134e-02 |
1.196e-02 |
X-ray |
|
1.04729e-01 |
1.344e-01 |
Gamma |
|
1.11207e-01 |
5.789e-02 |
Gamma |
|
1.61269e-01 |
6.493e-02 |
Gamma |
|
2.15326e-01 |
2.777e-02 |
Gamma |
|
2.16547e-01 |
9.426e-02 |
Gamma |
|
2.26748e-01 |
1.475e-02 |
Gamma |
|
2.52845e-01 |
1.068e-01 |
Gamma |
|
3.18008e-01 |
5.750e-02 |
Gamma |
|
3.84250e-01 |
3.133e-02 |
Gamma |
|
5.36674e-01 |
3.301e-02 |
Gamma |
|
7.92067e-01 |
3.692e-02 |
Gamma |
|
8.94760e-01 |
2.750e-02 |
Gamma |
|
9.03282e-01 |
3.735e-02 |
Gamma |
|
9.20933e-01 |
8.136e-02 |
Gamma |
|
1.17377e+00 |
1.213e-02 |
Gamma |
|
2.53687e-05 |
1.231e+00 |
Auger electron |
|
2.73516e-05 |
2.098e+00 |
Auger electron |
|
1.61387e-04 |
2.098e+00 |
Auger electron |
|
1.61853e-04 |
3.580e+00 |
Auger electron |
|
3.17098e-04 |
7.380e-02 |
Auger electron |
|
3.19100e-04 |
7.047e-01 |
Auger electron |
|
3.20731e-04 |
4.152e-01 |
Auger electron |
|
3.25832e-04 |
1.303e-01 |
Auger electron |
|
5.30635e-04 |
1.727e-01 |
Auger electron |
|
6.44535e-04 |
1.259e-01 |
Auger electron |
|
1.47226e-03 |
9.676e-01 |
Auger electron |
|
1.52311e-03 |
1.703e+00 |
Auger electron |
|
1.65816e-03 |
6.215e-02 |
Auger electron |
|
1.71214e-03 |
1.211e-01 |
Auger electron |
|
6.54665e-03 |
5.179e-01 |
Auger electron |
|
6.54939e-03 |
2.929e-01 |
Auger electron |
|
8.30917e-03 |
1.125e-01 |
Auger electron |
|
8.36238e-03 |
2.011e-01 |
Auger electron |
|
1.01004e-02 |
1.077e-02 |
Auger electron |
|
1.02042e-02 |
1.939e-02 |
Auger electron |
|
1.14240e-02 |
1.361e-02 |
Conversion electron |
|
2.15810e-02 |
1.046e-02 |
Conversion electron |
|
3.28730e-02 |
5.057e-01 |
Conversion electron |
|
4.15180e-02 |
4.145e-02 |
Conversion electron |
|
4.32010e-02 |
7.677e-02 |
Conversion electron |
|
4.85493e-02 |
1.465e-02 |
Auger electron |
|
5.21420e-02 |
3.618e-02 |
Conversion electron |
|
5.30068e-02 |
1.999e-02 |
Conversion electron |
|
5.35090e-02 |
3.688e-02 |
Conversion electron |
|
6.14438e-02 |
1.877e-02 |
Conversion electron |
|
7.07720e-02 |
1.022e-01 |
Conversion electron |
|
7.12870e-02 |
1.910e-02 |
Conversion electron |
|
7.27420e-02 |
3.936e-01 |
Conversion electron |
|
8.09195e-02 |
1.736e-01 |
Conversion electron |
|
8.32800e-02 |
5.161e-02 |
Conversion electron |
|
9.15800e-02 |
5.757e-02 |
Conversion electron |
|
9.22210e-02 |
7.381e-02 |
Conversion electron |
|
9.27360e-02 |
1.319e-02 |
Conversion electron |
|
9.96340e-02 |
4.193e-02 |
Conversion electron |
|
1.01001e-01 |
3.633e-02 |
Conversion electron |
|
1.02368e-01 |
2.173e-02 |
Conversion electron |
|
1.08936e-01 |
2.099e-02 |
Conversion electron |
|
1.46858e-01 |
1.289e-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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