Isotopes of cadmium

Isotope data
cadmium symbol icon

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

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. 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]
  3. For further information about radioisotopes see Jonghwa Chang's (Korea Atomic Energy Research Institute) Table of the Nuclides

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