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Radionuclide Dosimetric Data Sheets
Zirconium-89m
Summary data
General
Classification
Isotope: Zr-89m
Atomic number (Z): 40
Mass number (A): 89
Neutron number (N): 49
Radioactive decay
Decay modes: β+, Electron capture, Internal
transition
Half-life: 4.161 [m]
Decay constant: 2.7764e-03 [1/s]
Daughters: Zr-89 (93.8%), Y-89 (6.23%)
Radioactive daughters: Zr-89
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.03184 [MeV]
Mean photon energy: 0.63439 [MeV]
Air kerma rate constant, Γ10: 2.418e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.476e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 5.101e-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-:
5.101e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.016e-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/Zr-89m 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/Zr-89m 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-89m 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-89m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
5.29809e-06 |
6.171e-01 |
X-ray |
|
6.52413e-06 |
5.088e-01 |
X-ray |
|
1.49185e-02 |
1.630e-02 |
X-ray |
|
1.57372e-02 |
1.473e-02 |
X-ray |
|
5.11000e-01 |
3.028e-02 |
Annihilation photon |
|
5.87800e-01 |
8.962e-01 |
Gamma |
|
1.50740e+00 |
6.056e-02 |
Gamma |
|
3.90931e-01 |
1.345e-02 |
Positron |
|
2.02938e-05 |
3.433e-01 |
Auger electron |
|
2.22365e-05 |
2.698e-01 |
Auger electron |
|
9.45921e-05 |
1.052e-01 |
Auger electron |
|
9.61258e-05 |
4.696e-02 |
Auger electron |
|
9.84254e-05 |
4.033e-02 |
Auger electron |
|
1.17872e-04 |
9.241e-02 |
Auger electron |
|
1.66232e-03 |
4.420e-02 |
Auger electron |
|
1.75398e-03 |
3.834e-02 |
Auger electron |
|
5.69838e-01 |
3.634e-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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