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Radionuclide Dosimetric Data Sheets
Rhenium-186m
Summary data
General
Classification
Isotope: Re-186m
Atomic number (Z): 75
Mass number (A): 186
Neutron number (N): 111
Radioactive decay
Decay modes: Internal transition
Half-life: 200000.0 [y]
Decay constant: 1.0982e-13 [1/s]
Daughters: Re-186 (100.0%)
Radioactive daughters: Re-186
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.12669 [MeV]
Mean photon energy: 0.02067 [MeV]
Air kerma rate constant, Γ10: 1.516e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.516e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.030e-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-:
2.030e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 3.312e-15
[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-186m 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-186m 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-186m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
3.75795e-05 |
2.216e+01 |
X-ray |
|
1.84862e-03 |
8.968e-02 |
X-ray |
|
7.62640e-03 |
1.493e-02 |
X-ray |
|
8.57619e-03 |
2.552e-02 |
X-ray |
|
8.64528e-03 |
2.251e-01 |
X-ray |
|
9.83057e-03 |
2.275e-02 |
X-ray |
|
1.00312e-02 |
1.372e-01 |
X-ray |
|
1.01475e-02 |
2.805e-02 |
X-ray |
|
1.02735e-02 |
4.035e-02 |
X-ray |
|
1.17147e-02 |
2.584e-02 |
X-ray |
|
4.03500e-02 |
5.038e-02 |
Gamma |
|
5.90090e-02 |
1.783e-01 |
Gamma |
|
9.93620e-02 |
1.073e-02 |
Gamma |
|
2.73040e-05 |
4.381e+00 |
Auger electron |
|
5.27722e-05 |
1.276e-02 |
Auger electron |
|
1.62417e-04 |
7.385e+00 |
Auger electron |
|
3.31924e-04 |
1.501e+00 |
Auger electron |
|
3.35028e-04 |
2.833e-01 |
Auger electron |
|
4.81177e-04 |
8.484e-01 |
Auger electron |
|
1.52532e-03 |
3.530e+00 |
Auger electron |
|
1.71480e-03 |
2.490e-01 |
Auger electron |
|
1.98650e-03 |
1.331e-02 |
Auger electron |
|
6.76600e-03 |
9.066e-01 |
Auger electron |
|
8.60249e-03 |
3.545e-01 |
Auger electron |
|
1.04753e-02 |
3.444e-02 |
Auger electron |
|
2.78420e-02 |
4.633e-01 |
Conversion electron |
|
2.83570e-02 |
1.003e-01 |
Conversion electron |
|
2.98120e-02 |
6.873e-02 |
Conversion electron |
|
3.79895e-02 |
1.475e-01 |
Conversion electron |
|
3.80070e-02 |
2.938e-01 |
Conversion electron |
|
3.94620e-02 |
2.812e-01 |
Conversion electron |
|
4.03500e-02 |
4.304e-02 |
Conversion electron |
|
4.65010e-02 |
5.398e-01 |
Conversion electron |
|
4.70160e-02 |
5.045e-02 |
Conversion electron |
|
4.76395e-02 |
4.140e-01 |
Conversion electron |
|
5.66485e-02 |
1.368e-01 |
Conversion electron |
|
5.90090e-02 |
4.047e-02 |
Conversion electron |
|
8.73690e-02 |
1.426e-02 |
Conversion electron |
|
8.88240e-02 |
1.263e-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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