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Radionuclide Dosimetric Data Sheets
Dysprosium-159
Summary data
General
Classification
Isotope: Dy-159
Atomic number (Z): 66
Mass number (A): 159
Neutron number (N): 93
Radioactive decay
Decay modes: Electron capture
Half-life: 144.4 [d]
Decay constant: 5.5558e-08 [1/s]
Daughters: Tb-159 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.01307 [MeV]
Mean photon energy: 0.04561 [MeV]
Air kerma rate constant, Γ10: 2.799e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.799e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.094e-15 [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-:
2.094e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 7.308e-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-159 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-159 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/Dy-159 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.38267e-05 |
1.104e+01 |
X-ray |
|
1.16078e-03 |
1.865e-02 |
X-ray |
|
6.26069e-03 |
8.115e-02 |
X-ray |
|
6.98190e-03 |
5.355e-02 |
X-ray |
|
7.35101e-03 |
1.369e-02 |
X-ray |
|
4.37992e-02 |
2.700e-01 |
X-ray |
|
4.45546e-02 |
4.839e-01 |
X-ray |
|
5.03066e-02 |
4.950e-02 |
X-ray |
|
5.04632e-02 |
9.574e-02 |
X-ray |
|
5.17440e-02 |
1.086e-02 |
X-ray |
|
5.17791e-02 |
2.105e-02 |
X-ray |
|
5.80000e-02 |
2.220e-02 |
Gamma |
|
1.73725e-05 |
6.589e-01 |
Auger electron |
|
1.21985e-04 |
5.046e+00 |
Auger electron |
|
1.35890e-04 |
3.111e-01 |
Auger electron |
|
1.97465e-04 |
8.047e-01 |
Auger electron |
|
6.23083e-04 |
1.715e-01 |
Auger electron |
|
9.61231e-04 |
1.701e+00 |
Auger electron |
|
1.13714e-03 |
9.678e-02 |
Auger electron |
|
4.95880e-03 |
6.143e-01 |
Auger electron |
|
5.94000e-03 |
2.033e-01 |
Conversion electron |
|
6.16748e-03 |
2.148e-01 |
Auger electron |
|
7.41064e-03 |
1.887e-02 |
Auger electron |
|
3.58945e-02 |
4.019e-02 |
Auger electron |
|
4.25487e-02 |
1.999e-02 |
Auger electron |
|
4.93269e-02 |
2.715e-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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