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Radionuclide Dosimetric Data Sheets
Neodymium-137
Summary data
General
Classification
Isotope: Nd-137
Atomic number (Z): 60
Mass number (A): 137
Neutron number (N): 77
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 38.5 [m]
Decay constant: 3.0006e-04 [1/s]
Daughters: Pr-137 (100.0%)
Radioactive daughters: Pr-137
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.32466 [MeV]
Mean photon energy: 1.17894 [MeV]
Air kerma rate constant, Γ10: 3.292e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 4.473e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 5.202e-14 [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-:
5.202e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.889e-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/Nd-137 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/Nd-137 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/Nd-137 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/Nd-137 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.56198e-05 |
1.376e+01 |
X-ray |
|
8.16858e-04 |
1.050e-02 |
X-ray |
|
5.01953e-03 |
6.140e-02 |
X-ray |
|
5.48692e-03 |
3.772e-02 |
X-ray |
|
5.83581e-03 |
1.005e-02 |
X-ray |
|
3.55671e-02 |
2.733e-01 |
X-ray |
|
3.60557e-02 |
4.991e-01 |
X-ray |
|
4.06843e-02 |
4.892e-02 |
X-ray |
|
4.07816e-02 |
9.470e-02 |
X-ray |
|
4.17693e-02 |
1.046e-02 |
X-ray |
|
4.17904e-02 |
2.033e-02 |
X-ray |
|
7.55000e-02 |
1.702e-01 |
Gamma |
|
2.30500e-01 |
1.280e-02 |
Gamma |
|
2.38200e-01 |
3.520e-02 |
Gamma |
|
3.06600e-01 |
9.984e-02 |
Gamma |
|
3.82000e-01 |
1.024e-02 |
Gamma |
|
4.74900e-01 |
1.152e-02 |
Gamma |
|
5.05100e-01 |
8.960e-02 |
Gamma |
|
5.11000e-01 |
6.102e-01 |
Annihilation photon |
|
5.80600e-01 |
1.280e-01 |
Gamma |
|
6.15600e-01 |
1.037e-02 |
Gamma |
|
6.86100e-01 |
1.792e-02 |
Gamma |
|
7.61600e-01 |
8.960e-02 |
Gamma |
|
7.81600e-01 |
9.344e-02 |
Gamma |
|
9.25900e-01 |
7.296e-02 |
Gamma |
|
9.29200e-01 |
2.944e-02 |
Gamma |
|
1.24310e+00 |
1.408e-02 |
Gamma |
|
7.09273e-01 |
1.993e-02 |
Positron |
|
7.73980e-01 |
2.890e-02 |
Positron |
|
8.16953e-01 |
3.288e-02 |
Positron |
|
8.98668e-01 |
7.274e-02 |
Positron |
|
9.88830e-01 |
1.993e-02 |
Positron |
|
1.12884e+00 |
1.096e-01 |
Positron |
|
1.29601e-05 |
1.608e+00 |
Auger electron |
|
3.35201e-05 |
1.306e-02 |
Auger electron |
|
7.04437e-05 |
1.720e+00 |
Auger electron |
|
8.72015e-05 |
4.834e+00 |
Auger electron |
|
1.42945e-04 |
7.634e-01 |
Auger electron |
|
4.14022e-04 |
1.594e-01 |
Auger electron |
|
6.67576e-04 |
1.782e+00 |
Auger electron |
|
8.25664e-04 |
1.260e-01 |
Auger electron |
|
3.99632e-03 |
6.822e-01 |
Auger electron |
|
4.89950e-03 |
2.272e-01 |
Auger electron |
|
5.83588e-03 |
1.861e-02 |
Auger electron |
|
2.93378e-02 |
5.569e-02 |
Auger electron |
|
3.34900e-02 |
4.329e-01 |
Conversion electron |
|
3.45832e-02 |
2.649e-02 |
Auger electron |
|
6.87002e-02 |
5.412e-02 |
Conversion electron |
|
6.90571e-02 |
1.144e-02 |
Conversion electron |
|
7.42716e-02 |
1.612e-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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