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Radionuclide Dosimetric Data Sheets

Rhodium-100

Isotope:  Rh-100
Atomic number (Z):  45
Mass number (A):  100
Neutron number (N):  55

Decay modes:  β+, Electron capture
Half-life:  20.8 [h]
Decay constant:  9.2568e-06 [1/s]
Daughters:  Ru-100 (100.0%)
Radioactive daughters:  None

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.04943 [MeV]
Mean photon energy:  2.74253 [MeV]
Air kerma rate constant, Γ₁₀:  9.735e-17 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  9.885e-17 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  7.920e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δ_α:  0.000e+00 [Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δ_β-,β+,e-:  7.920e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  4.394e-13 [Gy·kg/Bq·s]

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-100 DPK.csv

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-100 Summary Spectrum.csv

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-100 Beta Spectrum.csv

 

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-100 Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
8.90917e-06	8.583e+00	X-ray
2.54865e-03	2.287e-02	X-ray
2.67727e-03	1.064e-02	X-ray
1.91152e-02	1.914e-01	X-ray
1.92483e-02	3.631e-01	X-ray
2.16049e-02	3.047e-02	X-ray
2.16277e-02	5.925e-02	X-ray
2.20364e-02	1.149e-02	X-ray
4.46153e-01	1.198e-01	Gamma
5.11000e-01	7.751e-02	Annihilation photon
5.39512e-01	8.060e-01	Gamma
5.88343e-01	5.005e-02	Gamma
5.90792e-01	1.089e-02	Gamma
8.22654e-01	2.109e-01	Gamma
1.03451e+00	1.546e-02	Gamma
1.10722e+00	1.357e-01	Gamma
1.34152e+00	5.288e-02	Gamma
1.36215e+00	1.539e-01	Gamma
1.55335e+00	2.067e-01	Gamma
1.62734e+00	1.635e-02	Gamma
1.92981e+00	1.161e-01	Gamma
2.37598e+00	3.264e-01	Gamma
2.52997e+00	2.559e-02	Gamma
9.24190e-01	1.199e-02	Positron
1.17389e+00	2.398e-02	Positron
3.14517e-05	3.560e+00	Auger electron
1.08023e-04	1.868e-01	Auger electron
1.14179e-04	8.049e-01	Auger electron
2.31924e-04	1.971e+00	Auger electron
2.77406e-04	1.449e-02	Auger electron
2.15887e-03	7.681e-01	Auger electron
2.46841e-03	1.309e-01	Auger electron
1.61570e-02	1.207e-01	Auger electron
1.86981e-02	4.644e-02	Auger electron

 

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

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

 

 

 

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