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Radionuclide Dosimetric Data Sheets
Neodymium-140
Summary data
General
Classification
Isotope: Nd-140
Atomic number (Z): 60
Mass number (A): 140
Neutron number (N): 80
Radioactive decay
Decay modes: Electron capture
Half-life: 3.37 [d]
Decay constant: 2.3806e-06 [1/s]
Daughters: Pr-140 (100.0%)
Radioactive daughters: Pr-140
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.00693 [MeV]
Mean photon energy: 0.02874 [MeV]
Air kerma rate constant, Γ10: 3.053e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 3.053e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.110e-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-:
1.110e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.605e-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-140 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-140 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-140 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.56207e-05 |
1.111e+01 |
X-ray |
|
5.01953e-03 |
4.876e-02 |
X-ray |
|
5.48692e-03 |
2.975e-02 |
X-ray |
|
3.55671e-02 |
2.173e-01 |
X-ray |
|
3.60557e-02 |
3.969e-01 |
X-ray |
|
4.06843e-02 |
3.889e-02 |
X-ray |
|
4.07816e-02 |
7.530e-02 |
X-ray |
|
4.17904e-02 |
1.617e-02 |
X-ray |
|
1.29601e-05 |
1.299e+00 |
Auger electron |
|
3.35200e-05 |
1.055e-02 |
Auger electron |
|
7.05311e-05 |
1.387e+00 |
Auger electron |
|
8.71793e-05 |
3.904e+00 |
Auger electron |
|
1.42815e-04 |
6.215e-01 |
Auger electron |
|
4.19627e-04 |
1.381e-01 |
Auger electron |
|
6.67853e-04 |
1.430e+00 |
Auger electron |
|
8.26374e-04 |
1.012e-01 |
Auger electron |
|
4.00127e-03 |
5.471e-01 |
Auger electron |
|
4.90516e-03 |
1.823e-01 |
Auger electron |
|
5.84276e-03 |
1.495e-02 |
Auger electron |
|
2.93378e-02 |
4.428e-02 |
Auger electron |
|
3.45832e-02 |
2.106e-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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