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Radionuclide Dosimetric Data Sheets
Niobium-98m
Summary data
General
Classification
Isotope: Nb-98m
Atomic number (Z): 41
Mass number (A): 98
Neutron number (N): 57
Radioactive decay
Decay modes: β-
Half-life: 51.3 [m]
Decay constant: 2.2519e-04 [1/s]
Daughters: Mo-98 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.76358 [MeV]
Mean photon energy: 2.8177 [MeV]
Air kerma rate constant, Γ10: 9.958e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 9.958e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.223e-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-:
1.223e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.514e-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-98m 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-98m 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/Nb-98m 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/Nb-98m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
6.84804e-06 |
2.258e-01 |
X-ray |
|
1.72950e-01 |
1.354e-02 |
Gamma |
|
3.35258e-01 |
9.527e-02 |
Gamma |
|
4.34260e-01 |
1.130e-02 |
Gamma |
|
6.44847e-01 |
5.604e-02 |
Gamma |
|
7.13817e-01 |
9.153e-02 |
Gamma |
|
7.22626e-01 |
7.379e-01 |
Gamma |
|
7.87363e-01 |
9.340e-01 |
Gamma |
|
7.91646e-01 |
7.827e-02 |
Gamma |
|
8.23390e-01 |
2.522e-02 |
Gamma |
|
8.33556e-01 |
1.083e-01 |
Gamma |
|
9.09670e-01 |
1.280e-02 |
Gamma |
|
9.92880e-01 |
1.102e-02 |
Gamma |
|
9.96300e-01 |
2.073e-02 |
Gamma |
|
1.02370e+00 |
1.018e-02 |
Gamma |
|
1.16883e+00 |
1.784e-01 |
Gamma |
|
1.23015e+00 |
1.420e-02 |
Gamma |
|
1.33545e+00 |
1.242e-02 |
Gamma |
|
1.43218e+00 |
4.969e-02 |
Gamma |
|
1.43642e+00 |
2.522e-02 |
Gamma |
|
1.51168e+00 |
4.819e-02 |
Gamma |
|
1.54092e+00 |
1.961e-02 |
Gamma |
|
1.54603e+00 |
3.932e-02 |
Gamma |
|
1.70150e+00 |
8.873e-02 |
Gamma |
|
1.88440e+00 |
2.886e-02 |
Gamma |
|
1.94501e+00 |
1.382e-02 |
Gamma |
|
1.98017e+00 |
3.241e-02 |
Gamma |
|
3.72155e-01 |
1.250e-02 |
Beta |
|
4.43825e-01 |
1.703e-02 |
Beta |
|
4.70030e-01 |
3.641e-02 |
Beta |
|
4.99692e-01 |
3.248e-02 |
Beta |
|
5.50178e-01 |
1.023e-01 |
Beta |
|
6.21686e-01 |
2.362e-02 |
Beta |
|
6.34789e-01 |
6.269e-02 |
Beta |
|
7.49836e-01 |
7.578e-02 |
Beta |
|
7.90429e-01 |
2.746e-01 |
Beta |
|
8.75633e-01 |
2.362e-02 |
Beta |
|
9.14897e-01 |
1.476e-02 |
Beta |
|
9.71773e-01 |
1.279e-02 |
Beta |
|
1.00090e+00 |
1.565e-01 |
Beta |
|
1.33654e+00 |
4.330e-02 |
Beta |
|
2.73633e-05 |
1.046e-01 |
Auger electron |
|
1.06828e-04 |
1.989e-02 |
Auger electron |
|
1.76202e-04 |
4.768e-02 |
Auger electron |
|
1.95189e-03 |
1.907e-02 |
Auger electron |
|
7.14775e-01 |
1.151e-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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