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Radionuclide Dosimetric Data Sheets
Rhodium-100m
Summary data
General
Classification
Isotope: Rh-100m
Atomic number (Z): 45
Mass number (A): 100
Neutron number (N): 55
Radioactive decay
Decay modes: β+, Electron capture, Internal
transition
Half-life: 4.6 [m]
Decay constant: 2.5114e-03 [1/s]
Daughters: Rh-100 (98.3%), Ru-100 (1.7%)
Radioactive daughters: Rh-100
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.08017 [MeV]
Mean photon energy: 0.0637 [MeV]
Air kerma rate constant, Γ10: 1.291e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.307e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.284e-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-:
1.284e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.021e-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/Rh-100m 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/Rh-100m 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/Rh-100m 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/Rh-100m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
8.90919e-06 |
1.161e-01 |
X-ray |
|
9.95880e-06 |
1.417e+01 |
X-ray |
|
2.68654e-03 |
4.165e-02 |
X-ray |
|
2.82847e-03 |
2.246e-02 |
X-ray |
|
2.00395e-02 |
2.441e-01 |
X-ray |
|
2.01865e-02 |
4.622e-01 |
X-ray |
|
2.26708e-02 |
3.930e-02 |
X-ray |
|
2.26963e-02 |
7.642e-02 |
X-ray |
|
2.31362e-02 |
1.510e-02 |
X-ray |
|
3.27000e-02 |
7.962e-02 |
Gamma |
|
7.49000e-02 |
1.592e-02 |
Gamma |
|
7.49000e-02 |
6.370e-02 |
Gamma |
|
5.39600e-01 |
1.683e-02 |
Gamma |
|
6.86900e-01 |
1.010e-02 |
Gamma |
|
3.14525e-05 |
4.817e-02 |
Auger electron |
|
3.35508e-05 |
5.602e+00 |
Auger electron |
|
1.09881e-04 |
2.503e-01 |
Auger electron |
|
1.14203e-04 |
1.089e-02 |
Auger electron |
|
1.18975e-04 |
1.383e+00 |
Auger electron |
|
2.31918e-04 |
2.667e-02 |
Auger electron |
|
2.60285e-04 |
3.348e+00 |
Auger electron |
|
3.06870e-04 |
2.178e-02 |
Auger electron |
|
2.15882e-03 |
1.040e-02 |
Auger electron |
|
2.26758e-03 |
1.313e+00 |
Auger electron |
|
2.60828e-03 |
2.433e-01 |
Auger electron |
|
2.97213e-03 |
1.237e-02 |
Auger electron |
|
9.50900e-03 |
3.573e-02 |
Conversion electron |
|
9.50900e-03 |
6.448e-01 |
Conversion electron |
|
1.69094e-02 |
1.406e-01 |
Auger electron |
|
1.89090e-02 |
1.279e-02 |
Conversion electron |
|
1.95952e-02 |
5.504e-02 |
Auger electron |
|
2.93088e-02 |
1.879e-02 |
Conversion electron |
|
2.93088e-02 |
7.204e-02 |
Conversion electron |
|
2.95485e-02 |
3.107e-02 |
Conversion electron |
|
2.96955e-02 |
3.243e-02 |
Conversion electron |
|
2.96955e-02 |
4.090e-02 |
Conversion electron |
|
3.22053e-02 |
2.759e-02 |
Conversion electron |
|
3.22053e-02 |
1.165e-02 |
Conversion electron |
|
5.17090e-02 |
3.344e-01 |
Conversion electron |
|
5.17090e-02 |
1.864e-02 |
Conversion electron |
|
7.15088e-02 |
2.563e-02 |
Conversion electron |
|
7.17485e-02 |
1.709e-01 |
Conversion electron |
|
7.18955e-02 |
2.112e-01 |
Conversion electron |
|
7.44053e-02 |
8.203e-02 |
Conversion electron |
|
7.49000e-02 |
1.353e-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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