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Radionuclide Dosimetric Data Sheets
Rhodium-95m
Summary data
General
Classification
Isotope: Rh-95m
Atomic number (Z): 45
Mass number (A): 95
Neutron number (N): 50
Radioactive decay
Decay modes: β+, Electron capture, Internal
transition
Half-life: 1.96 [m]
Decay constant: 5.8941e-03 [1/s]
Daughters: Rh-95 (88.0%), Ru-95 (12.0%)
Radioactive daughters: Rh-95, Ru-95
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.18219 [MeV]
Mean photon energy: 0.89725 [MeV]
Air kerma rate constant, Γ10: 2.751e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.088e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.919e-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-:
2.919e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.438e-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/Rh-95m 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-95m 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-95m 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-95m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
8.90920e-06 |
2.939e-01 |
X-ray |
|
9.95816e-06 |
6.835e-01 |
X-ray |
|
1.92483e-02 |
1.249e-02 |
X-ray |
|
2.00395e-02 |
1.595e-02 |
X-ray |
|
2.01865e-02 |
3.019e-02 |
X-ray |
|
5.11000e-01 |
1.741e-01 |
Annihilation photon |
|
5.43300e-01 |
8.008e-01 |
Gamma |
|
7.87700e-01 |
8.171e-02 |
Gamma |
|
3.40710e+00 |
2.106e-02 |
Gamma |
|
3.82440e+00 |
1.348e-02 |
Gamma |
|
4.33650e+00 |
1.011e-02 |
Gamma |
|
1.75642e+00 |
7.535e-02 |
Positron |
|
3.14527e-05 |
1.219e-01 |
Auger electron |
|
3.35239e-05 |
2.703e-01 |
Auger electron |
|
1.10566e-04 |
1.523e-02 |
Auger electron |
|
1.14211e-04 |
2.756e-02 |
Auger electron |
|
1.18264e-04 |
6.595e-02 |
Auger electron |
|
2.31916e-04 |
6.748e-02 |
Auger electron |
|
2.60340e-04 |
1.617e-01 |
Auger electron |
|
2.15881e-03 |
2.633e-02 |
Auger electron |
|
2.26695e-03 |
6.255e-02 |
Auger electron |
|
2.60815e-03 |
1.160e-02 |
Auger electron |
|
5.20109e-01 |
6.834e-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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