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Radionuclide Dosimetric Data Sheets
Holmium-162m
Summary data
General
Classification
Isotope: Ho-162m
Atomic number (Z): 67
Mass number (A): 162
Neutron number (N): 95
Radioactive decay
Decay modes: β+, Electron capture, Internal
transition
Half-life: 67.0 [m]
Decay constant: 1.7242e-04 [1/s]
Daughters: Ho-162 (62.0%), Dy-162 (38.0%)
Radioactive daughters: Ho-162
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.07394 [MeV]
Mean photon energy: 0.56137 [MeV]
Air kerma rate constant, Γ10: 2.056e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.057e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.185e-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-:
1.185e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 8.994e-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/Ho-162m 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/Ho-162m 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/Ho-162m 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/Ho-162m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.36521e-05 |
1.416e+01 |
X-ray |
|
1.37043e-05 |
6.222e+00 |
X-ray |
|
1.22909e-03 |
1.198e-02 |
X-ray |
|
1.30155e-03 |
2.904e-02 |
X-ray |
|
6.48150e-03 |
4.963e-02 |
X-ray |
|
6.66650e-03 |
1.132e-02 |
X-ray |
|
6.70640e-03 |
1.000e-01 |
X-ray |
|
7.25411e-03 |
3.737e-02 |
X-ray |
|
7.44982e-03 |
1.281e-02 |
X-ray |
|
7.53349e-03 |
7.607e-02 |
X-ray |
|
7.63171e-03 |
1.763e-02 |
X-ray |
|
7.89548e-03 |
1.697e-02 |
X-ray |
|
8.75507e-03 |
1.340e-02 |
X-ray |
|
3.83000e-02 |
7.568e-02 |
Gamma |
|
4.52703e-02 |
1.228e-01 |
X-ray |
|
4.60801e-02 |
2.195e-01 |
X-ray |
|
4.67702e-02 |
1.292e-01 |
X-ray |
|
4.76373e-02 |
2.302e-01 |
X-ray |
|
5.20302e-02 |
2.259e-02 |
X-ray |
|
5.21989e-02 |
4.367e-02 |
X-ray |
|
5.37885e-02 |
2.384e-02 |
X-ray |
|
5.39705e-02 |
4.608e-02 |
X-ray |
|
5.53966e-02 |
1.019e-02 |
X-ray |
|
5.78000e-02 |
4.332e-02 |
Gamma |
|
8.07000e-02 |
4.332e-02 |
Gamma |
|
1.85000e-01 |
2.859e-01 |
Gamma |
|
2.82900e-01 |
1.135e-01 |
Gamma |
|
9.37200e-01 |
1.077e-01 |
Gamma |
|
1.12490e+00 |
1.175e-02 |
Gamma |
|
1.22000e+00 |
2.253e-01 |
Gamma |
|
1.81686e-05 |
3.428e-01 |
Auger electron |
|
1.89749e-05 |
7.488e-01 |
Auger electron |
|
1.28569e-04 |
2.840e+00 |
Auger electron |
|
1.34636e-04 |
6.462e+00 |
Auger electron |
|
1.54348e-04 |
1.398e-01 |
Auger electron |
|
1.81724e-04 |
2.690e-01 |
Auger electron |
|
2.10470e-04 |
4.558e-01 |
Auger electron |
|
2.24480e-04 |
1.121e+00 |
Auger electron |
|
6.47104e-04 |
8.010e-02 |
Auger electron |
|
7.19818e-04 |
3.291e-01 |
Auger electron |
|
1.01700e-03 |
9.953e-01 |
Auger electron |
|
1.07130e-03 |
1.602e-01 |
Conversion electron |
|
1.07754e-03 |
2.202e+00 |
Auger electron |
|
1.19236e-03 |
5.409e-02 |
Auger electron |
|
1.25859e-03 |
1.157e-01 |
Auger electron |
|
1.93830e-03 |
2.442e-01 |
Conversion electron |
|
2.10100e-03 |
4.774e-01 |
Conversion electron |
|
5.12417e-03 |
3.535e-01 |
Auger electron |
|
5.37412e-03 |
7.486e-01 |
Auger electron |
|
6.38587e-03 |
1.244e-01 |
Auger electron |
|
6.70172e-03 |
2.662e-01 |
Auger electron |
|
7.68108e-03 |
1.102e-02 |
Auger electron |
|
8.06619e-03 |
2.388e-02 |
Auger electron |
|
8.27150e-03 |
1.693e-01 |
Conversion electron |
|
1.00000e-02 |
4.570e-02 |
Conversion electron |
|
2.68390e-02 |
7.667e-02 |
Conversion electron |
|
2.89398e-02 |
3.838e-01 |
Conversion electron |
|
2.93713e-02 |
3.452e-02 |
Conversion electron |
|
3.65715e-02 |
9.392e-02 |
Conversion electron |
|
3.70640e-02 |
1.747e-02 |
Auger electron |
|
3.82545e-02 |
1.786e-02 |
Auger electron |
|
3.83000e-02 |
2.646e-02 |
Conversion electron |
|
4.84398e-02 |
6.521e-02 |
Conversion electron |
|
5.60715e-02 |
1.719e-02 |
Conversion electron |
|
7.21093e-02 |
6.761e-02 |
Conversion electron |
|
7.29190e-02 |
7.136e-02 |
Conversion electron |
|
7.90379e-02 |
3.522e-02 |
Conversion electron |
|
1.31139e-01 |
5.722e-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)
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