Isotopes of neodymium

Isotope data

Neodymium isotopes are used in a variety of scientific applications. Nd-142 has been used for the production of short-lived Tm and Yb isotopes. Nd-146 has been suggested for the production of Pm-147 which can be used as a source for radioisotopic power generation. Several Nd isotopes have been used for the production of other Pm isotopes. Finally, Nd-150 has been used to study double beta decay. Neodymium isotopes can be obtained from Trace Sciences International.

Naturally occurring isotopes

This table shows information about naturally occuring isotopes, their atomic masses, their natural abundances, their nuclear spins, and their magnetic moments. Further data for radioisotopes (radioactive isotopes) of neodymium are listed (including any which occur naturally) below.
Isotope Atomic mass (ma/u) Natural abundance (atom %) Nuclear spin (I) Magnetic moment (μ/μN)
142Nd 141.907719 (4) 27.2 (5) 0
143Nd 142.909810 (4) 12.2 (2) 7/2 -1.065
144Nd 143.910083 (4) 23.8 (3) 0
145Nd 144.912570 (4) 8.3 (1) 7/2 -0.656
146Nd 145.913113 (4) 17.2 (3) 0
148Nd 147.916889 (4) 5.7 (1) 0
150Nd 149.920887 (4) 5.6 (2) 0

Isotopic abundances of Nd
In the above picture, the most intense ion is set to 100% since this corresponds best to the output from a mass spectrometer. This is not to be confused with the relative percentage isotope abundances which total 100% for all the naturally occurring isotopes.

Radiosotope data

Further data for naturally occuring isotopes of neodymium are listed above. This table gives information about some radiosotopes of neodymium, their masses, their half-lives, their modes of decay, their nuclear spins, and their nuclear magnetic moments.
Isotope Mass Half-life Mode of decay Nuclear spin Nuclear magnetic moment
138Nd 137.9119 5.1 h EC to 138Pr 0
139Nd 138.91192 5.5 h EC to 139Pr 11/2
140Nd 139.90931 3.37 d EC to 140Pr 0
141Nd 140.909605 2.49 h EC to 141Pr 3/2 1.01
147Nd 146.916096 10.98 d β- to 147Pm 5/2 0.58
149Nd 148.920145 1.73 h β- to 149Pm 5/2 0.35

Sheffield ChemPuter isotope pattern calculator

You can use WebElements to calculate an isotope pattern for an arbitrary chemical formula:

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References

  1. Naturally occurring isotope abundances: Commission on Atomic Weights and Isotopic Abundances report for the International Union of Pure and Applied Chemistry in Isotopic Compositions of the Elements 1989, Pure and Applied Chemistry, 1998, 70, 217. [Copyright 1998 IUPAC]
  2. For further information about radioisotopes see Jonghwa Chang's (Korea Atomic Energy Research Institute) Table of the Nuclides
  3. Masses, nuclear spins, and magnetic moments: I. Mills, T. Cvitas, K. Homann, N. Kallay, and K. Kuchitsu in Quantities, Units and Symbols in Physical Chemistry, Blackwell Scientific Publications, Oxford, UK, 1988. [Copyright 1988 IUPAC]

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