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Radionuclide Dosimetric Data Sheets
Niobium-93m
Summary data
General
Classification
Isotope: Nb-93m
Atomic number (Z): 41
Mass number (A): 93
Neutron number (N): 52
Radioactive decay
Decay modes: Internal transition
Half-life: 16.13 [y]
Decay constant: 1.3617e-09 [1/s]
Daughters: Nb-93 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.02944 [MeV]
Mean photon energy: 0.002 [MeV]
Air kerma rate constant, Γ10: 2.229e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.229e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 4.717e-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-:
4.717e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 3.204e-16
[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-93m 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-93m 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-93m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
5.82933e-06 |
9.262e+00 |
X-ray |
|
2.15729e-03 |
1.992e-02 |
X-ray |
|
1.64814e-02 |
3.248e-02 |
X-ray |
|
1.65789e-02 |
6.202e-02 |
X-ray |
|
2.53055e-05 |
4.567e+00 |
Auger electron |
|
1.02405e-04 |
7.966e-01 |
Auger electron |
|
1.14237e-04 |
1.458e-01 |
Auger electron |
|
1.49044e-04 |
1.848e+00 |
Auger electron |
|
1.89352e-04 |
2.036e-02 |
Auger electron |
|
1.83863e-03 |
7.281e-01 |
Auger electron |
|
2.05871e-03 |
9.271e-02 |
Auger electron |
|
1.18220e-02 |
1.498e-01 |
Conversion electron |
|
1.40095e-02 |
2.730e-02 |
Auger electron |
|
2.80937e-02 |
1.469e-01 |
Conversion electron |
|
2.83034e-02 |
2.809e-02 |
Conversion electron |
|
2.84009e-02 |
5.208e-01 |
Conversion electron |
|
3.04107e-02 |
1.533e-01 |
Conversion electron |
|
3.07700e-02 |
2.291e-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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