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Radionuclide Dosimetric Data Sheets
Neodymium-138
Summary data
General
Classification
Isotope: Nd-138
Atomic number (Z): 60
Mass number (A): 138
Neutron number (N): 78
Radioactive decay
Decay modes: Electron capture
Half-life: 5.04 [h]
Decay constant: 3.8203e-05 [1/s]
Daughters: Pr-138 (100.0%)
Radioactive daughters: Pr-138
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.00818 [MeV]
Mean photon energy: 0.04382 [MeV]
Air kerma rate constant, Γ10: 3.655e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.655e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.311e-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-:
1.311e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 7.021e-15
[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-138 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-138 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/Nd-138 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.56196e-05 |
1.118e+01 |
X-ray |
|
5.01953e-03 |
4.962e-02 |
X-ray |
|
5.48692e-03 |
3.021e-02 |
X-ray |
|
3.55671e-02 |
2.231e-01 |
X-ray |
|
3.60557e-02 |
4.074e-01 |
X-ray |
|
4.06843e-02 |
3.992e-02 |
X-ray |
|
4.07816e-02 |
7.729e-02 |
X-ray |
|
4.17904e-02 |
1.659e-02 |
X-ray |
|
3.25760e-01 |
2.928e-02 |
Gamma |
|
1.29601e-05 |
1.307e+00 |
Auger electron |
|
3.35200e-05 |
1.062e-02 |
Auger electron |
|
7.04866e-05 |
1.397e+00 |
Auger electron |
|
8.71903e-05 |
3.931e+00 |
Auger electron |
|
1.42847e-04 |
6.229e-01 |
Auger electron |
|
4.16914e-04 |
1.338e-01 |
Auger electron |
|
6.67699e-04 |
1.444e+00 |
Auger electron |
|
8.25992e-04 |
1.022e-01 |
Auger electron |
|
3.99818e-03 |
5.529e-01 |
Auger electron |
|
4.90166e-03 |
1.841e-01 |
Auger electron |
|
5.83859e-03 |
1.509e-02 |
Auger electron |
|
2.93378e-02 |
4.545e-02 |
Auger electron |
|
3.45832e-02 |
2.162e-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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