Isotopes of cadmium

The nine stable Cadmium isotopes are used for many different purposes. Cd-110 is used for the production of the radioisotope In-110, while Cd-112 is used in the production of the widely used diagnostic radioisotope In-111. Cd-108 is used in the production of Cd-109 which is a calibration source for 88 keV gamma radiation. The even numbered Cd isotopes (mainly Cd-110, Cd-112, Cd-114 and Cd-116) are used to improve the power output and coherence length of HeCd lasers. Cadmium 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 cadmium are listed (including any which occur naturally) below.
Isotope Atomic mass (ma/u) Natural abundance (atom %) Nuclear spin (I) Magnetic moment (μ/μN)
106Cd 105.906461 (7) 1.25 (6) 0
108Cd 107.904176 (6) 0.89 (3) 0
110Cd 109.903005 (4) 12.49 (18) 0
111Cd 110.904182 (3) 12.80 (12) 1/2 -0.5948857
112Cd 111.902757 (3) 24.13 (21) 0
113Cd 112.904400 (3) 12.22 (12) 1/2 -0.6223005
114Cd 113.903357 (3) 28.73 (42) 0
116Cd 115.904755 (4) 7.49 (18) 0

Isotopic abundances of Cd
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 cadmium are listed above. This table gives information about some radiosotopes of cadmium, 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
107Cd 106.90661 6.52 h EC to 107Ag 5/2 -0.615055
109Cd 108.90495 462 d EC to 109Ag 5/2 -0.827846
115Cd 114.905431 2.228 h β- to 115Cd 1/2 -1.087
117Cd 116.907228 2.49 h β- to 117Cd 1/2

Sheffield ChemPuter isotope pattern calculator

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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 cadmium

Common reference compound: Cd(CH3)2 .

Table of NMR-active nucleus propeties of cadmium
  Isotope 1 Isotope 2 Isotope 3
Isotope 111Cd 113Cd
Natural abundance /% 12.80 12.22
Spin (I) 1/2 1/2
Frequency relative to 1H = 100 (MHz) 21.215478 22.193173
Receptivity, DP, relative to 1H = 1.00 0.00124 0.00135
Receptivity, DC, relative to 13C = 1.00 7.07 7.72
Magnetogyric ratio, γ (107 rad T-1 s-1) -5.6983131 -5.9609153
Magnetic moment, μ (μN) -1.0303729 -1.0778568
Nuclear quadrupole moment, Q/millibarn -850(90) [excited nuclear state] -
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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cadmium atomic number