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Radionuclide Dosimetric Data Sheets

Cadmium-117

Summary data

General

Classification

Isotope:  Cd-117
Atomic number (Z):  48
Mass number (A):  117
Neutron number (N):  69

Radioactive decay

Decay modes:  β-
Half-life:  2.49 [h]
Decay constant:  7.7326e-05 [1/s]
Daughters:  In-117m (91.5%), In-117 (8.49%)
Radioactive daughters:  In-117m, In-117

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.43789 [MeV]
Mean photon energy:  1.07963 [MeV]
Air kerma rate constant, Γ10:  3.739e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  3.739e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  7.016e-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-:  7.016e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  1.730e-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-117 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-117 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-117 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

8.12606e-06

1.235e+00

X-ray

2.39785e-02

1.632e-02

X-ray

2.41926e-02

3.061e-02

X-ray

8.97300e-02

3.264e-02

Gamma

2.20920e-01

1.172e-02

Gamma

2.73349e-01

2.790e-01

Gamma

3.44459e-01

1.788e-01

Gamma

4.34190e-01

9.793e-02

Gamma

8.31800e-01

2.260e-02

Gamma

8.80710e-01

3.962e-02

Gamma

9.45670e-01

1.534e-02

Gamma

1.05170e+00

3.794e-02

Gamma

1.11660e+00

1.032e-02

Gamma

1.14243e+00

1.674e-02

Gamma

1.24789e+00

1.200e-02

Gamma

1.26000e+00

1.144e-02

Gamma

1.30327e+00

1.836e-01

Gamma

1.33757e+00

1.618e-02

Gamma

1.40872e+00

1.283e-02

Gamma

1.56224e+00

1.423e-02

Gamma

1.57662e+00

1.119e-01

Gamma

1.70693e+00

1.004e-02

Gamma

1.72306e+00

2.009e-02

Gamma

5.90153e-02

6.117e-02

Beta

1.03549e-01

1.875e-02

Beta

1.24479e-01

1.579e-02

Beta

1.40351e-01

1.480e-02

Beta

1.55217e-01

2.171e-02

Beta

1.64156e-01

8.091e-02

Beta

2.03048e-01

3.157e-01

Beta

2.72315e-01

3.355e-02

Beta

6.83769e-01

1.302e-01

Beta

7.24107e-01

2.565e-02

Beta

7.56225e-01

3.651e-02

Beta

8.80744e-01

2.072e-01

Beta

8.85518e-06

6.123e-01

Auger electron

3.35706e-05

2.140e-01

Auger electron

1.26435e-04

6.645e-02

Auger electron

2.46605e-04

1.012e-02

Auger electron

3.70450e-04

1.532e-01

Auger electron

2.72907e-03

6.061e-02

Auger electron

3.20815e-03

1.480e-02

Auger electron

6.18090e-02

5.226e-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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