Isotopes of strontium

Isotope data
strontium symbol icon

Strontium has four stable isotopes and two of them have medical applications. Sr-86 is used for the production of the PET isotope Y-86 which is used in dosimetry prior to Y-90 based radioimmunotherapy. Sr-88 is used for the production of Sr-89 which is the active agent in MetastronTM. Strontium 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 strontium are listed (including any which occur naturally) below.
Isotope Atomic mass (ma/u) Natural abundance (atom %) Nuclear spin (I) Magnetic moment (μ/μN)
84Sr 83.913430 (4) 0.56 (1) 0
86Sr 85.9092672 (28) 9.86 (1) 0
87Sr 86.9088841 (28) 7.00 (1) 9/2 -1.09283
88Sr 87.9056188 (28) 82.58 (1) 0

Isotopic abundances of Sr
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 strontium are listed above. This table gives information about some radiosotopes of strontium, 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
80Sr 79.92453 1.77 h EC to 80Rb 0
81Sr 80.92322 22.3 m EC to 81Rb 1/2 0.544
82Sr 81.91840 25.36 d EC to 82Rb 1/2
83Sr 82.91756 1.350 d EC to 83Rb 7/2 -0.898
85Sr 84.912936 64.85 d EC to 85Rb 9/2 -1.001
89Sr 88.907455 50.52 d β- to 89Y 5/2 -1.149
90Sr 89.907738 29.1 y β- to 90Y 0
91Sr 90.91020 9.5 h β- to 91Y 5/2 -0.887
92Sr 91.91098 2.71 h β- to 92Y 0

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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strontium atomic number