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Radionuclide Dosimetric Data Sheets
Zirconium-87
Summary data
General
Classification
Isotope: Zr-87
Atomic number (Z): 40
Mass number (A): 87
Neutron number (N): 47
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 1.68 [h]
Decay constant: 1.1461e-04 [1/s]
Daughters: Y-87m (99.7%), Y-87 (0.296%)
Radioactive daughters: Y-87m, Y-87
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.82177 [MeV]
Mean photon energy: 0.92706 [MeV]
Air kerma rate constant, Γ10: 5.814e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.748e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.317e-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-:
1.317e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.485e-13
[Gy·kg/Bq·s]
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/Zr-87 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/Zr-87 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/Zr-87 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
5.29809e-06 |
2.381e+00 |
X-ray |
|
1.48403e-02 |
3.283e-02 |
X-ray |
|
1.49185e-02 |
6.290e-02 |
X-ray |
|
5.11000e-01 |
1.636e+00 |
Annihilation photon |
|
1.22700e+00 |
2.800e-02 |
Gamma |
|
1.01212e+00 |
8.038e-01 |
Positron |
|
2.02938e-05 |
1.325e+00 |
Auger electron |
|
9.45918e-05 |
4.060e-01 |
Auger electron |
|
9.61265e-05 |
1.812e-01 |
Auger electron |
|
1.00854e-04 |
3.767e-02 |
Auger electron |
|
1.31750e-04 |
1.494e-02 |
Auger electron |
|
1.66231e-03 |
1.706e-01 |
Auger electron |
|
1.82712e-03 |
1.707e-02 |
Auger electron |
|
1.26657e-02 |
3.377e-02 |
Auger electron |
|
1.45497e-02 |
1.174e-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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