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Radionuclide Dosimetric Data Sheets
Dysprosium-165
Summary data
General
Classification
Isotope: Dy-165
Atomic number (Z): 66
Mass number (A): 165
Neutron number (N): 99
Radioactive decay
Decay modes: β-
Half-life: 2.334 [h]
Decay constant: 8.2494e-05 [1/s]
Daughters: Ho-165 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.44728 [MeV]
Mean photon energy: 0.02673 [MeV]
Air kerma rate constant, Γ10: 1.046e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.046e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 7.166e-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-:
7.166e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.283e-15
[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/Dy-165 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/Dy-165 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/Dy-165 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/Dy-165 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.36180e-05 |
1.007e+00 |
X-ray |
|
4.67702e-02 |
2.704e-02 |
X-ray |
|
4.76373e-02 |
4.816e-02 |
X-ray |
|
9.47000e-02 |
3.578e-02 |
Gamma |
|
8.22114e-02 |
1.694e-02 |
Beta |
|
4.14664e-01 |
1.495e-01 |
Beta |
|
4.53609e-01 |
8.273e-01 |
Beta |
|
1.89749e-05 |
5.213e-02 |
Auger electron |
|
1.34851e-04 |
4.579e-01 |
Auger electron |
|
1.77498e-04 |
1.867e-02 |
Auger electron |
|
2.21771e-04 |
7.504e-02 |
Auger electron |
|
7.02089e-04 |
1.503e-02 |
Auger electron |
|
1.07433e-03 |
1.639e-01 |
Auger electron |
|
5.29678e-03 |
5.804e-02 |
Auger electron |
|
6.61561e-03 |
2.056e-02 |
Auger electron |
|
3.90010e-02 |
9.366e-02 |
Conversion electron |
|
8.53398e-02 |
1.268e-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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