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Radionuclide Dosimetric Data Sheets
Rhodium-101m
Summary data
General
Classification
Isotope: Rh-101m
Atomic number (Z): 45
Mass number (A): 101
Neutron number (N): 56
Radioactive decay
Decay modes: Electron capture, Internal transition
Half-life: 4.34 [d]
Decay constant: 1.8485e-06 [1/s]
Daughters: Rh-101 (6.4%), Ru-101 (93.6%)
Radioactive daughters: Rh-101
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.01993 [MeV]
Mean photon energy: 0.28767 [MeV]
Air kerma rate constant, Γ10: 1.994e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.994e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 3.193e-15 [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-:
3.193e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.609e-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-101m 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-101m 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/Rh-101m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
8.90911e-06 |
8.448e+00 |
X-ray |
|
9.95777e-06 |
5.900e-01 |
X-ray |
|
2.54865e-03 |
2.247e-02 |
X-ray |
|
2.67727e-03 |
1.040e-02 |
X-ray |
|
1.91152e-02 |
1.866e-01 |
X-ray |
|
1.92483e-02 |
3.541e-01 |
X-ray |
|
2.00395e-02 |
1.195e-02 |
X-ray |
|
2.01865e-02 |
2.262e-02 |
X-ray |
|
2.16049e-02 |
2.971e-02 |
X-ray |
|
2.16277e-02 |
5.779e-02 |
X-ray |
|
2.20364e-02 |
1.120e-02 |
X-ray |
|
3.06857e-01 |
8.059e-01 |
Gamma |
|
5.45117e-01 |
4.271e-02 |
Gamma |
|
3.14499e-05 |
3.505e+00 |
Auger electron |
|
3.35150e-05 |
2.335e-01 |
Auger electron |
|
1.08138e-04 |
1.875e-01 |
Auger electron |
|
1.10732e-04 |
1.360e-02 |
Auger electron |
|
1.14118e-04 |
7.921e-01 |
Auger electron |
|
1.18001e-04 |
5.704e-02 |
Auger electron |
|
2.31939e-04 |
1.940e+00 |
Auger electron |
|
2.60399e-04 |
1.395e-01 |
Auger electron |
|
2.77492e-04 |
1.427e-02 |
Auger electron |
|
2.15898e-03 |
7.544e-01 |
Auger electron |
|
2.26561e-03 |
5.359e-02 |
Auger electron |
|
2.46858e-03 |
1.286e-01 |
Auger electron |
|
1.61570e-02 |
1.177e-01 |
Auger electron |
|
1.86981e-02 |
4.529e-02 |
Auger electron |
|
1.34219e-01 |
5.121e-02 |
Conversion electron |
|
2.84770e-01 |
1.117e-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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