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Radionuclide Dosimetric Data Sheets

Neodymium-151

Summary data

General

Classification

Isotope:  Nd-151
Atomic number (Z):  60
Mass number (A):  151
Neutron number (N):  91

Radioactive decay

Decay modes:  β-
Half-life:  12.44 [m]
Decay constant:  9.2865e-04 [1/s]
Daughters:  Pm-151 (100.0%)
Radioactive daughters:  Pm-151

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.61946 [MeV]
Mean photon energy:  0.85175 [MeV]
Air kerma rate constant, Γ10:  3.031e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  3.031e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  9.925e-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-:  9.925e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  1.365e-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-151 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-151 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-151 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-151 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

1.48441e-05

3.071e+00

X-ray

5.41729e-03

1.666e-02

X-ray

5.95960e-03

1.079e-02

X-ray

3.81996e-02

6.255e-02

X-ray

3.87671e-02

1.135e-01

X-ray

4.37575e-02

1.130e-02

X-ray

4.38721e-02

2.186e-02

X-ray

6.89800e-02

1.264e-02

Gamma

8.51200e-02

2.048e-02

Gamma

8.99600e-02

1.529e-02

Gamma

1.16800e-01

3.897e-01

Gamma

1.38890e-01

7.049e-02

Gamma

1.70760e-01

2.873e-02

Gamma

1.75070e-01

6.331e-02

Gamma

2.55680e-01

1.476e-01

Gamma

3.00580e-01

1.822e-02

Gamma

4.23560e-01

5.919e-02

Gamma

5.85220e-01

1.303e-02

Gamma

6.77880e-01

2.381e-02

Gamma

7.36230e-01

5.919e-02

Gamma

7.39200e-01

1.516e-02

Gamma

7.55570e-01

1.170e-02

Gamma

7.97530e-01

4.722e-02

Gamma

1.01640e+00

2.500e-02

Gamma

1.12263e+00

4.083e-02

Gamma

1.18089e+00

1.330e-01

Gamma

1.69374e-01

1.494e-02

Beta

3.39647e-01

1.063e-02

Beta

3.99532e-01

1.794e-01

Beta

4.67977e-01

3.910e-02

Beta

5.61153e-01

8.721e-02

Beta

5.87606e-01

9.623e-02

Beta

5.92811e-01

4.411e-02

Beta

7.24399e-01

3.098e-02

Beta

7.38773e-01

1.804e-02

Beta

7.74911e-01

2.606e-02

Beta

8.20280e-01

3.910e-02

Beta

8.51155e-01

7.518e-02

Beta

8.77692e-01

1.002e-02

Beta

9.66305e-01

1.464e-01

Beta

1.43706e-05

2.681e-01

Auger electron

8.51406e-05

2.507e-01

Auger electron

1.00588e-04

1.227e+00

Auger electron

1.60095e-04

1.966e-01

Auger electron

4.68181e-04

3.630e-02

Auger electron

7.55798e-04

4.296e-01

Auger electron

9.22186e-04

2.850e-02

Auger electron

4.29771e-03

1.614e-01

Auger electron

5.29698e-03

5.473e-02

Auger electron

1.30610e-02

2.377e-02

Conversion electron

2.37610e-02

4.939e-02

Conversion electron

3.14373e-02

1.139e-02

Auger electron

3.99010e-02

4.120e-02

Conversion electron

7.15810e-02

5.790e-02

Conversion electron

2.10461e-01

1.294e-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

 

 

 

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