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Radionuclide Dosimetric Data Sheets
Holmium-150
Summary data
General
Classification
Isotope: Ho-150
Atomic number (Z): 67
Mass number (A): 150
Neutron number (N): 83
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 76.8 [s]
Decay constant: 9.0254e-03 [1/s]
Daughters: Dy-150 (100.0%)
Radioactive daughters: Dy-150
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 1.98571 [MeV]
Mean photon energy: 1.88434 [MeV]
Air kerma rate constant, Γ10: 3.899e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 7.051e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 3.181e-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-:
3.181e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 3.019e-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/Ho-150 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-150 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-150 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-150 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.37116e-05 |
1.646e+00 |
X-ray |
|
6.48150e-03 |
1.337e-02 |
X-ray |
|
4.52703e-02 |
4.358e-02 |
X-ray |
|
4.60801e-02 |
7.788e-02 |
X-ray |
|
5.21989e-02 |
1.550e-02 |
X-ray |
|
5.11000e-01 |
1.628e+00 |
Annihilation photon |
|
5.91300e-01 |
2.250e-01 |
Gamma |
|
6.53400e-01 |
1.530e-01 |
Gamma |
|
8.03700e-01 |
9.000e-01 |
Gamma |
|
9.83000e-01 |
9.000e-02 |
Gamma |
|
2.08313e+00 |
7.111e-02 |
Positron |
|
2.20106e+00 |
1.012e-01 |
Positron |
|
2.26750e+00 |
1.903e-01 |
Positron |
|
2.54723e+00 |
3.706e-01 |
Positron |
|
2.87307e+00 |
8.112e-02 |
Positron |
|
1.81686e-05 |
9.113e-02 |
Auger electron |
|
1.28561e-04 |
7.510e-01 |
Auger electron |
|
1.55362e-04 |
3.690e-02 |
Auger electron |
|
2.09591e-04 |
1.210e-01 |
Auger electron |
|
6.59360e-04 |
2.431e-02 |
Auger electron |
|
1.01693e-03 |
2.614e-01 |
Auger electron |
|
1.19269e-03 |
1.422e-02 |
Auger electron |
|
5.12098e-03 |
9.356e-02 |
Auger electron |
|
6.38370e-03 |
3.292e-02 |
Auger 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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