<= Return to MIRDspec isotope database
Radionuclide Dosimetric Data Sheets
Cadmium-111m
Summary data
General
Classification
Isotope: Cd-111m
Atomic number (Z): 48
Mass number (A): 111
Neutron number (N): 63
Radioactive decay
Decay modes: Internal transition
Half-life: 48.5 [m]
Decay constant: 2.3819e-04 [1/s]
Daughters: Cd-111 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.10655 [MeV]
Mean photon energy: 0.28425 [MeV]
Air kerma rate constant, Γ10: 1.346e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.346e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.707e-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-:
1.707e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.554e-14
[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-111m 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-111m Summary 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-111m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.71516e-05 |
5.179e+00 |
X-ray |
|
3.12254e-03 |
1.954e-02 |
X-ray |
|
3.31084e-03 |
1.208e-02 |
X-ray |
|
2.29571e-02 |
1.148e-01 |
X-ray |
|
2.31527e-02 |
2.158e-01 |
X-ray |
|
2.60401e-02 |
1.904e-02 |
X-ray |
|
2.60753e-02 |
3.699e-02 |
X-ray |
|
1.50825e-01 |
2.914e-01 |
Gamma |
|
2.45395e-01 |
9.400e-01 |
Gamma |
|
3.68364e-05 |
1.823e+00 |
Auger electron |
|
1.29114e-04 |
5.350e-01 |
Auger electron |
|
1.61777e-04 |
9.099e-02 |
Auger electron |
|
3.45140e-04 |
1.282e+00 |
Auger electron |
|
4.01105e-04 |
1.451e-02 |
Auger electron |
|
2.61108e-03 |
4.986e-01 |
Auger electron |
|
3.05329e-03 |
1.147e-01 |
Auger electron |
|
1.92752e-02 |
5.095e-02 |
Auger electron |
|
2.24238e-02 |
2.096e-02 |
Auger electron |
|
1.24137e-01 |
4.221e-01 |
Conversion electron |
|
1.46831e-01 |
3.855e-02 |
Conversion electron |
|
1.47094e-01 |
8.310e-02 |
Conversion electron |
|
1.47290e-01 |
7.982e-02 |
Conversion electron |
|
1.50212e-01 |
4.137e-02 |
Conversion electron |
|
2.18707e-01 |
5.033e-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
