<= Return to MIRDspec isotope database
Radionuclide Dosimetric Data Sheets
Molybdenum-89
Summary data
General
Classification
Isotope: Mo-89
Atomic number (Z): 42
Mass number (A): 89
Neutron number (N): 47
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 2.11 [m]
Decay constant: 5.4751e-03 [1/s]
Daughters: Nb-89 (100.0%)
Radioactive daughters: Nb-89
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 1.96204 [MeV]
Mean photon energy: 1.21727 [MeV]
Air kerma rate constant, Γ10: 8.195e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 4.563e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 3.144e-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-:
3.144e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.950e-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/Mo-89 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/Mo-89 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/Mo-89 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/Mo-89 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
5.83035e-06 |
3.616e-01 |
X-ray |
|
1.65789e-02 |
1.196e-02 |
X-ray |
|
5.11000e-01 |
1.934e+00 |
Annihilation photon |
|
6.58600e-01 |
5.838e-02 |
Gamma |
|
8.44000e-01 |
3.780e-02 |
Gamma |
|
1.13100e+00 |
1.470e-02 |
Gamma |
|
1.15530e+00 |
1.848e-02 |
Gamma |
|
1.27200e+00 |
2.898e-02 |
Gamma |
|
2.22100e+00 |
1.197e-02 |
Gamma |
|
1.28037e+00 |
1.364e-02 |
Positron |
|
1.52456e+00 |
2.630e-02 |
Positron |
|
1.57997e+00 |
1.753e-02 |
Positron |
|
1.72807e+00 |
3.507e-02 |
Positron |
|
1.81661e+00 |
4.188e-02 |
Positron |
|
2.13267e+00 |
7.890e-01 |
Positron |
|
2.53253e-05 |
1.781e-01 |
Auger electron |
|
1.03507e-04 |
3.050e-02 |
Auger electron |
|
1.48959e-04 |
7.215e-02 |
Auger electron |
|
1.85287e-03 |
2.905e-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)
<= Return to MIRDspec isotope database
