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Radionuclide Dosimetric Data Sheets

Cadmium-105

Isotope:  Cd-105
Atomic number (Z):  48
Mass number (A):  105
Neutron number (N):  57

Decay modes:  β+, Electron capture
Half-life:  55.5 [m]
Decay constant:  2.0815e-04 [1/s]
Daughters:  Ag-105m (83.0%), Ag-105 (17.0%)
Radioactive daughters:  Ag-105m, Ag-105

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.21667 [MeV]
Mean photon energy:  1.29945 [MeV]
Air kerma rate constant, Γ₁₀:  3.836e-17 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  4.920e-17 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  3.471e-14 [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-:  3.471e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  2.082e-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/Cd-105 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/Cd-105 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/Cd-105 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/Cd-105 Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
1.20774e-05	5.878e+00	X-ray
2.97345e-03	2.112e-02	X-ray
3.14510e-03	1.025e-02	X-ray
2.19609e-02	1.570e-01	X-ray
2.21389e-02	2.959e-01	X-ray
2.48888e-02	2.580e-02	X-ray
2.49204e-02	5.013e-02	X-ray
2.54258e-02	1.014e-02	X-ray
3.46870e-01	4.202e-02	Gamma
4.33240e-01	2.814e-02	Gamma
5.11000e-01	5.599e-01	Annihilation photon
6.07220e-01	3.743e-02	Gamma
6.48490e-01	1.571e-02	Gamma
6.48490e-01	1.571e-02	Gamma
9.34140e-01	1.271e-02	Gamma
9.61840e-01	4.690e-02	Gamma
1.07165e+00	1.280e-02	Gamma
1.30246e+00	3.977e-02	Gamma
1.38848e+00	2.697e-02	Gamma
1.41610e+00	1.454e-02	Gamma
1.55784e+00	2.050e-02	Gamma
1.63581e+00	1.046e-02	Gamma
1.69334e+00	3.541e-02	Gamma
1.89752e+00	1.445e-02	Gamma
1.93311e+00	1.590e-02	Gamma
2.27285e+00	1.032e-02	Gamma
2.33326e+00	1.979e-02	Gamma
7.54224e-01	2.786e-01	Positron
3.78136e-05	2.142e+00	Auger electron
1.26884e-04	5.945e-01	Auger electron
1.34902e-04	1.346e-01	Auger electron
3.19047e-04	1.448e+00	Auger electron
2.18100e-03	3.278e-02	Conversion electron
2.49425e-03	5.526e-01	Auger electron
2.90232e-03	1.198e-01	Auger electron
1.84718e-02	7.589e-02	Auger electron
2.14605e-02	3.066e-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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