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Radionuclide Dosimetric Data Sheets
Cobalt-62m
Summary data
General
Classification
Isotope: Co-62m
Atomic number (Z): 27
Mass number (A): 62
Neutron number (N): 35
Radioactive decay
Decay modes: β-
Half-life: 13.91 [m]
Decay constant: 8.3051e-04 [1/s]
Daughters: Ni-62 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 1.09738 [MeV]
Mean photon energy: 2.69231 [MeV]
Air kerma rate constant, Γ10: 8.989e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 8.989e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.758e-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-:
1.758e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.314e-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/Co-62m 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/Co-62m 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/Co-62m 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/Co-62m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.77500e-01 |
1.720e-02 |
Gamma |
|
8.75000e-01 |
1.280e-02 |
Gamma |
|
1.12900e+00 |
1.290e-02 |
Gamma |
|
1.16350e+00 |
6.800e-01 |
Gamma |
|
1.17290e+00 |
9.770e-01 |
Gamma |
|
1.71870e+00 |
6.741e-02 |
Gamma |
|
2.00370e+00 |
1.856e-01 |
Gamma |
|
2.10470e+00 |
6.448e-02 |
Gamma |
|
2.30190e+00 |
1.788e-02 |
Gamma |
|
2.88230e+00 |
1.094e-02 |
Gamma |
|
4.86308e-01 |
1.057e-01 |
Beta |
|
8.40617e-01 |
4.974e-02 |
Beta |
|
8.87691e-01 |
2.062e-01 |
Beta |
|
1.28574e+00 |
6.383e-01 |
Beta |
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)
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