Isotopes of neodymium

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

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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]

NMR Properties of neodymium

Common reference compound: .

Table of NMR-active nucleus propeties of neodymium
  Isotope 1 Isotope 2 Isotope 3
Isotope 143Nd 145Nd
Natural abundance /% 12.18 8.30
Spin (I) 7/2 7/2
Frequency relative to 1H = 100 (MHz) about 5.45 about 3.36
Receptivity, DP, relative to 1H = 1.00 - -
Receptivity, DC, relative to 13C = 1.00 - -
Magnetogyric ratio, γ (107 rad T-1 s-1) -1.457 -0.898
Magnetic moment, μ (μN) -1.208 -0.744
Nuclear quadrupole moment, Q/millibarn -630(60) -330(30)
Line width factor, 1056l (m4)

References

  1. R.K. Harris in Encyclopedia of Nuclear Magnetic Resonance, D.M. Granty and R.K. Harris, (eds.), vol. 5, John Wiley & Sons, Chichester, UK, 1996. I am grateful to Professor Robin Harris (University of Durham, UK) who provided much of the NMR data, which are copyright 1996 IUPAC, adapted from his contribution contained within this reference.
  2. J. Mason in Multinuclear NMR, Plenum Press, New York, USA, 1987. Where given, data for certain radioactive nuclei are from this reference.
  3. P. Pyykkö, Mol. Phys., 2008, 106, 1965-1974.
  4. P. Pyykkö, Mol. Phys., 2001, 99, 1617-1629.
  5. P. Pyykkö, Z. Naturforsch., 1992, 47a, 189. I am grateful to Professor Pekka Pyykkö (University of Helsinki, Finland) who provided the nuclear quadrupole moment data in this and the following two references.
  6. D.R. Lide, (ed.), CRC Handbook of Chemistry and Physics 1999-2000 : A Ready-Reference Book of Chemical and Physical Data (CRC Handbook of Chemistry and Physics, CRC Press, Boca Raton, Florida, USA, 79th edition, 1998.
  7. P. Pyykkö, personal communication, 1998, 204, 2008, 2010.
  8. The isotopic abundances are extracted from the naturally occurring isotopes section within WebElements.

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neodymium atomic number