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Radionuclide Dosimetric Data Sheets
Rhodium-104m
Summary data
General
Classification
Isotope: Rh-104m
Atomic number (Z): 45
Mass number (A): 104
Neutron number (N): 59
Radioactive decay
Decay modes: β-, Internal transition
Half-life: 4.34 [m]
Decay constant: 2.6619e-03 [1/s]
Daughters: Rh-104 (99.9%), Pd-104 (0.13%)
Radioactive daughters: Rh-104
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.08461 [MeV]
Mean photon energy: 0.04409 [MeV]
Air kerma rate constant, Γ10: 9.989e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 9.989e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.356e-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-:
1.356e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 7.064e-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/Rh-104m 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-104m 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-104m 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-104m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
9.95906e-06 |
1.128e+01 |
X-ray |
|
2.68654e-03 |
3.295e-02 |
X-ray |
|
2.82847e-03 |
1.865e-02 |
X-ray |
|
2.00395e-02 |
1.902e-01 |
X-ray |
|
2.01865e-02 |
3.600e-01 |
X-ray |
|
2.26708e-02 |
3.062e-02 |
X-ray |
|
2.26963e-02 |
5.953e-02 |
X-ray |
|
2.31362e-02 |
1.176e-02 |
X-ray |
|
5.14225e-02 |
4.828e-01 |
Gamma |
|
7.75330e-02 |
2.076e-02 |
Gamma |
|
9.71137e-02 |
2.993e-02 |
Gamma |
|
3.35597e-05 |
4.459e+00 |
Auger electron |
|
1.09589e-04 |
1.848e-01 |
Auger electron |
|
1.19213e-04 |
1.104e+00 |
Auger electron |
|
2.60255e-04 |
2.666e+00 |
Auger electron |
|
3.06591e-04 |
1.732e-02 |
Auger electron |
|
2.26810e-03 |
1.050e+00 |
Auger electron |
|
2.60868e-03 |
1.946e-01 |
Auger electron |
|
8.65100e-03 |
1.282e-02 |
Conversion electron |
|
1.69094e-02 |
1.095e-01 |
Auger electron |
|
1.95952e-02 |
4.287e-02 |
Auger electron |
|
2.82315e-02 |
4.075e-01 |
Conversion electron |
|
2.88375e-02 |
1.267e-02 |
Conversion electron |
|
4.80313e-02 |
3.720e-02 |
Conversion electron |
|
5.43420e-02 |
3.849e-01 |
Conversion electron |
|
7.41418e-02 |
2.982e-02 |
Conversion electron |
|
7.43815e-02 |
1.824e-01 |
Conversion electron |
|
7.45285e-02 |
2.235e-01 |
Conversion electron |
|
7.70383e-02 |
8.754e-02 |
Conversion electron |
|
7.75330e-02 |
1.445e-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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