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Radionuclide Dosimetric Data Sheets
Rhodium-94
Summary data
General
Classification
Isotope: Rh-94
Atomic number (Z): 45
Mass number (A): 94
Neutron number (N): 49
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 70.6 [s]
Decay constant: 9.8179e-03 [1/s]
Daughters: Ru-94 (100.0%)
Radioactive daughters: Ru-94
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 2.90116 [MeV]
Mean photon energy: 3.76337 [MeV]
Air kerma rate constant, Γ10: 9.217e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.303e-16 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 4.648e-13 [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-:
4.648e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 6.030e-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-94 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-94 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-94 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-94 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
8.90929e-06 |
1.958e-01 |
X-ray |
|
1.26400e-01 |
4.500e-02 |
Gamma |
|
3.11700e-01 |
1.200e-01 |
Gamma |
|
4.38100e-01 |
7.100e-02 |
Gamma |
|
4.92600e-01 |
4.200e-02 |
Gamma |
|
5.11000e-01 |
1.972e+00 |
Annihilation photon |
|
5.52900e-01 |
1.900e-02 |
Gamma |
|
7.56200e-01 |
5.100e-01 |
Gamma |
|
1.06810e+00 |
4.700e-02 |
Gamma |
|
1.07250e+00 |
3.070e-01 |
Gamma |
|
1.11070e+00 |
2.900e-02 |
Gamma |
|
1.43070e+00 |
1.000e+00 |
Gamma |
|
1.53970e+00 |
4.330e-02 |
Gamma |
|
1.80430e+00 |
2.200e-02 |
Gamma |
|
1.90250e+00 |
2.200e-02 |
Gamma |
|
2.12450e+00 |
1.500e-02 |
Gamma |
|
2.63160e+00 |
1.400e-02 |
Gamma |
|
2.67780e+00 |
1.400e-02 |
Gamma |
|
2.77860e+00 |
1.100e-02 |
Gamma |
|
3.00770e+00 |
1.000e-02 |
Gamma |
|
3.21030e+00 |
1.300e-02 |
Gamma |
|
3.25600e+00 |
2.000e-02 |
Gamma |
|
2.48115e+00 |
4.607e-02 |
Positron |
|
2.51844e+00 |
1.863e-02 |
Positron |
|
2.54762e+00 |
4.106e-02 |
Positron |
|
2.78647e+00 |
5.708e-02 |
Positron |
|
2.83232e+00 |
7.010e-02 |
Positron |
|
2.84565e+00 |
3.024e-01 |
Positron |
|
2.99955e+00 |
2.704e-01 |
Positron |
|
3.34484e+00 |
1.803e-01 |
Positron |
|
3.14553e-05 |
8.118e-02 |
Auger electron |
|
1.14298e-04 |
1.836e-02 |
Auger electron |
|
2.31892e-04 |
4.496e-02 |
Auger electron |
|
2.15872e-03 |
1.758e-02 |
Auger 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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