<= Return to MIRDspec isotope database


Radionuclide Dosimetric Data Sheets

Cadmium-119m

Summary data

General

Classification

Isotope:  Cd-119m
Atomic number (Z):  48
Mass number (A):  119
Neutron number (N):  71

Radioactive decay

Decay modes:  β-
Half-life:  2.2 [m]
Decay constant:  5.2511e-03 [1/s]
Daughters:  In-119 (99.8%), In-119m (0.213%)
Radioactive daughters:  In-119, In-119m

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.6898 [MeV]
Mean photon energy:  2.30207 [MeV]
Air kerma rate constant, Γ10:  7.578e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  7.578e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  1.105e-13 [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-:  1.105e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  3.688e-13 [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/Cd-119m 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/Cd-119m 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-119m 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-119m Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

8.12538e-06

5.179e-01

X-ray

2.41926e-02

1.465e-02

X-ray

1.05600e-01

3.274e-02

Gamma

3.60300e-01

1.017e-02

Gamma

4.11500e-01

1.141e-02

Gamma

4.22400e-01

9.474e-02

Gamma

5.85000e-01

4.886e-02

Gamma

7.09000e-01

1.215e-02

Gamma

7.20700e-01

1.786e-01

Gamma

8.17600e-01

1.339e-02

Gamma

9.02700e-01

1.116e-02

Gamma

9.23200e-01

6.870e-02

Gamma

9.96300e-01

1.637e-02

Gamma

1.02500e+00

2.480e-01

Gamma

1.10190e+00

9.672e-02

Gamma

1.18550e+00

2.902e-02

Gamma

1.20370e+00

1.339e-01

Gamma

1.33420e+00

2.108e-02

Gamma

1.34420e+00

6.721e-02

Gamma

1.36080e+00

1.488e-02

Gamma

1.36410e+00

5.208e-02

Gamma

1.39710e+00

1.240e-02

Gamma

1.43650e+00

5.084e-02

Gamma

1.46800e+00

1.042e-02

Gamma

1.66850e+00

3.050e-02

Gamma

1.70190e+00

2.802e-02

Gamma

1.77320e+00

1.290e-02

Gamma

2.02130e+00

2.257e-01

Gamma

2.10430e+00

5.853e-02

Gamma

2.39420e+00

1.240e-02

Gamma

2.42260e+00

4.489e-02

Gamma

2.52030e+00

1.116e-02

Gamma

4.62203e-01

2.512e-02

Beta

5.08590e-01

2.613e-02

Beta

5.27864e-01

1.126e-02

Beta

5.42341e-01

8.542e-02

Beta

5.70712e-01

8.843e-02

Beta

5.85389e-01

1.286e-01

Beta

5.98493e-01

2.814e-02

Beta

7.02218e-01

2.251e-01

Beta

7.12392e-01

5.125e-02

Beta

7.49816e-01

2.512e-01

Beta

1.01362e+00

1.105e-02

Beta

1.03540e+00

1.105e-02

Beta

1.05636e+00

1.105e-02

Beta

1.15405e+00

1.507e-02

Beta

1.20116e+00

1.407e-02

Beta

8.85821e-06

2.568e-01

Auger electron

3.35364e-05

9.014e-02

Auger electron

1.25873e-04

2.802e-02

Auger electron

3.70733e-04

6.374e-02

Auger electron

2.73316e-03

2.528e-02

Auger electron

7.76790e-02

2.546e-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)

<= Return to MIRDspec isotope database