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Radionuclide Dosimetric Data Sheets

Cadmium-103

Summary data

General

Classification

Isotope:  Cd-103
Atomic number (Z):  48
Mass number (A):  103
Neutron number (N):  55

Radioactive decay

Decay modes:  β+, Electron capture
Half-life:  7.3 [m]
Decay constant:  1.5825e-03 [1/s]
Daughters:  Ag-103 (100.0%)
Radioactive daughters:  Ag-103

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.36356 [MeV]
Mean photon energy:  2.08914 [MeV]
Air kerma rate constant, Γ10:  6.171e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  7.508e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  5.825e-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-:  5.825e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  3.347e-13 [Gy·kg/Bq·s]

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/Cd-103 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/Cd-103 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/Cd-103 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

1.20777e-05

7.310e+00

X-ray

2.97344e-03

2.619e-02

X-ray

3.14510e-03

1.317e-02

X-ray

2.19609e-02

1.901e-01

X-ray

2.21389e-02

3.582e-01

X-ray

2.48888e-02

3.123e-02

X-ray

2.49204e-02

6.068e-02

X-ray

2.54258e-02

1.228e-02

X-ray

2.75600e-02

1.287e-02

Gamma

1.34440e-01

3.522e-02

Gamma

2.43100e-01

1.474e-02

Gamma

3.86970e-01

3.604e-02

Gamma

4.56340e-01

2.925e-02

Gamma

5.11000e-01

6.912e-01

Annihilation photon

6.25200e-01

1.053e-02

Gamma

6.26210e-01

1.743e-02

Gamma

6.27000e-01

1.275e-02

Gamma

7.23100e-01

1.193e-02

Gamma

9.63100e-01

1.661e-02

Gamma

1.05251e+00

1.147e-02

Gamma

1.07990e+00

5.441e-02

Gamma

1.09932e+00

1.673e-02

Gamma

1.28761e+00

1.720e-02

Gamma

1.31166e+00

1.825e-02

Gamma

1.44870e+00

5.546e-02

Gamma

1.46181e+00

1.170e-01

Gamma

1.47627e+00

1.966e-02

Gamma

1.55200e+00

2.469e-02

Gamma

1.55694e+00

2.281e-02

Gamma

1.57060e+00

1.310e-02

Gamma

1.74845e+00

1.451e-02

Gamma

1.82202e+00

1.053e-02

Gamma

1.87996e+00

3.323e-02

Gamma

1.93023e+00

1.907e-02

Gamma

2.01195e+00

1.275e-02

Gamma

2.02253e+00

1.018e-02

Gamma

2.13303e+00

1.954e-02

Gamma

2.19945e+00

1.463e-02

Gamma

2.24512e+00

1.111e-02

Gamma

2.37367e+00

1.521e-02

Gamma

2.40106e+00

1.193e-02

Gamma

2.68135e+00

1.463e-02

Gamma

6.29592e-01

1.692e-02

Positron

7.32602e-01

1.904e-02

Positron

7.39125e-01

4.231e-02

Positron

9.12939e-01

2.010e-02

Positron

1.13845e+00

1.692e-02

Positron

1.36063e+00

2.539e-02

Positron

1.41429e+00

1.100e-01

Positron

3.78234e-05

2.662e+00

Auger electron

1.27100e-04

7.398e-01

Auger electron

1.34865e-04

1.603e-01

Auger electron

3.19009e-04

1.802e+00

Auger electron

2.07100e-03

1.448e-01

Conversion electron

2.49441e-03

6.897e-01

Auger electron

2.90237e-03

1.495e-01

Auger electron

1.84717e-02

9.186e-02

Auger electron

2.14605e-02

3.712e-02

Auger electron

2.37766e-02

1.661e-02

Conversion electron

1.08951e-01

7.929e-02

Conversion electron

1.30912e-01

1.695e-02

Conversion electron

1.31090e-01

1.725e-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

 

 

 

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