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Radionuclide Dosimetric Data Sheets
Neodymium-141m
Summary data
General
Classification
Isotope: Nd-141m
Atomic number (Z): 60
Mass number (A): 141
Neutron number (N): 81
Radioactive decay
Decay modes: β+, Electron capture, Internal
transition
Half-life: 62.0 [s]
Decay constant: 1.1180e-02 [1/s]
Daughters: Nd-141 (100.0%), Pr-141 (0.032%)
Radioactive daughters: Nd-141
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.06218 [MeV]
Mean photon energy: 0.69467 [MeV]
Air kerma rate constant, Γ10: 2.589e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.589e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 9.962e-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-:
9.962e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.113e-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-141m 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-141m 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-141m 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-141m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.52003e-05 |
9.034e-01 |
X-ray |
|
3.68696e-02 |
1.821e-02 |
X-ray |
|
3.73962e-02 |
3.316e-02 |
X-ray |
|
7.56510e-01 |
9.142e-01 |
Gamma |
|
1.36628e-05 |
9.049e-02 |
Auger electron |
|
7.81752e-05 |
9.200e-02 |
Auger electron |
|
9.39724e-05 |
3.425e-01 |
Auger electron |
|
1.51362e-04 |
5.280e-02 |
Auger electron |
|
4.45488e-04 |
1.130e-02 |
Auger electron |
|
7.10864e-04 |
1.210e-01 |
Auger electron |
|
4.15003e-03 |
4.591e-02 |
Auger electron |
|
5.10125e-03 |
1.544e-02 |
Auger electron |
|
7.12913e-01 |
6.894e-02 |
Conversion electron |
|
7.49417e-01 |
1.032e-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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