<= Return to MIRDspec isotope database
Radionuclide Dosimetric Data Sheets
Dysprosium-168
Summary data
General
Classification
Isotope: Dy-168
Atomic number (Z): 66
Mass number (A): 168
Neutron number (N): 102
Radioactive decay
Decay modes: β-
Half-life: 8.7 [m]
Decay constant: 1.3279e-03 [1/s]
Daughters: Ho-168 (100.0%)
Radioactive daughters: Ho-168
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.43319 [MeV]
Mean photon energy: 0.39483 [MeV]
Air kerma rate constant, Γ10: 1.495e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.495e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 6.940e-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-:
6.940e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 6.326e-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/Dy-168 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-168 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-168 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-168 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.36618e-05 |
6.372e+00 |
X-ray |
|
1.30161e-03 |
1.299e-02 |
X-ray |
|
6.70640e-03 |
4.618e-02 |
X-ray |
|
7.53350e-03 |
3.421e-02 |
X-ray |
|
4.38000e-02 |
4.400e-02 |
Gamma |
|
4.67702e-02 |
1.077e-01 |
X-ray |
|
4.76373e-02 |
1.918e-01 |
X-ray |
|
5.37885e-02 |
1.987e-02 |
X-ray |
|
5.39705e-02 |
3.841e-02 |
X-ray |
|
1.43500e-01 |
6.500e-02 |
Gamma |
|
1.92500e-01 |
3.280e-01 |
Gamma |
|
4.37000e-01 |
8.500e-02 |
Gamma |
|
4.43300e-01 |
1.550e-01 |
Gamma |
|
4.87000e-01 |
2.250e-01 |
Gamma |
|
6.30400e-01 |
1.360e-01 |
Gamma |
|
2.86344e-01 |
5.865e-01 |
Beta |
|
4.62171e-01 |
3.173e-01 |
Beta |
|
4.64412e-01 |
9.615e-02 |
Beta |
|
1.89749e-05 |
3.385e-01 |
Auger electron |
|
1.34635e-04 |
2.905e+00 |
Auger electron |
|
1.82616e-04 |
1.213e-01 |
Auger electron |
|
2.23867e-04 |
5.050e-01 |
Auger electron |
|
7.21794e-04 |
1.611e-01 |
Auger electron |
|
1.07748e-03 |
9.856e-01 |
Auger electron |
|
1.25874e-03 |
5.176e-02 |
Auger electron |
|
5.37955e-03 |
3.476e-01 |
Auger electron |
|
6.70812e-03 |
1.237e-01 |
Auger electron |
|
8.07392e-03 |
1.110e-02 |
Auger electron |
|
3.44398e-02 |
1.500e-01 |
Conversion electron |
|
3.48713e-02 |
1.340e-02 |
Conversion electron |
|
3.82545e-02 |
1.489e-02 |
Auger electron |
|
4.20715e-02 |
3.669e-02 |
Conversion electron |
|
4.38000e-02 |
1.037e-02 |
Conversion electron |
|
8.78010e-02 |
3.328e-01 |
Conversion electron |
|
1.34140e-01 |
6.293e-02 |
Conversion electron |
|
1.36801e-01 |
5.871e-02 |
Conversion electron |
|
1.41771e-01 |
1.870e-02 |
Conversion electron |
|
1.83571e-01 |
1.056e-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)
<= Return to MIRDspec isotope database
