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Radionuclide Dosimetric Data Sheets
Niobium-92
Summary data
General
Classification
Isotope: Nb-92
Atomic number (Z): 41
Mass number (A): 92
Neutron number (N): 51
Radioactive decay
Decay modes: Electron capture
Half-life: 34700000.0 [y]
Decay constant: 6.3300e-16 [1/s]
Daughters: Zr-92 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.00785 [MeV]
Mean photon energy: 1.50547 [MeV]
Air kerma rate constant, Γ10: 6.849e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 6.849e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.258e-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-:
1.258e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.412e-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/Nb-92 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/Nb-92 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/Nb-92 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
6.52409e-06 |
1.203e+01 |
X-ray |
|
2.03430e-03 |
1.815e-02 |
X-ray |
|
1.56498e-02 |
1.771e-01 |
X-ray |
|
1.57372e-02 |
3.389e-01 |
X-ray |
|
1.76171e-02 |
2.672e-02 |
X-ray |
|
1.76312e-02 |
5.204e-02 |
X-ray |
|
5.61100e-01 |
1.000e+00 |
Gamma |
|
9.34500e-01 |
1.000e+00 |
Gamma |
|
2.22336e-05 |
6.382e+00 |
Auger electron |
|
9.81908e-05 |
9.545e-01 |
Auger electron |
|
1.07470e-04 |
2.111e-01 |
Auger electron |
|
1.17923e-04 |
2.185e+00 |
Auger electron |
|
1.58281e-04 |
6.454e-02 |
Auger electron |
|
1.75373e-03 |
9.008e-01 |
Auger electron |
|
1.94483e-03 |
1.011e-01 |
Auger electron |
|
1.33271e-02 |
1.644e-01 |
Auger electron |
|
1.53342e-02 |
5.857e-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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