Strontium-90 is a radioactive isotope that is produced as an artificial product primarily in nuclear fission and occurs in the fallout from nuclear explosions and nuclear accidents. In medicine, Sr-90 is used as a radioactive source for superficial radiation therapy for some types of cancer.
Sr-90 consists of a nucleus with 38 protons and 52 neutrons; this results in the mass number 90. The isotope is an alpha emitter with a half-life of about 29 years, which can be harmful to humans if ingested in large quantities. Strontium-90 can accumulate in bones and teeth and cause damage there.
See also: list of Strontium isotopes.
Strontium-90 decays in a β--decay with the release of an electron to yttrium-90 (half-life 64 hours) and further to the stable zirconium-90 (emission of another electron and an antineutrino). p>
90Sr has a specific activity of 5.21 TBq/g.
Half-life T½ = 28.91(3) a respectively 9.11706 × 108 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|---|---|---|---|
β- | 90Y | 100% | 0.5460(14) MeV |
Direct parent isotope is: 90Rb.
Z | Isotone N = 52 | Isobar A = 90 |
---|---|---|
28 | 80Ni | |
29 | 81Cu | |
30 | 82Zn | |
31 | 83Ga | |
32 | 84Ge | 90Ge |
33 | 85As | 90As |
34 | 86Se | 90Se |
35 | 87Br | 90Br |
36 | 88Kr | 90Kr |
37 | 89Rb | 90Rb |
38 | 90Sr | 90Sr |
39 | 91Y | 90Y |
40 | 92Zr | 90Zr |
41 | 93Nb | 90Nb |
42 | 94Mo | 90Mo |
43 | 95Tc | 90Tc |
44 | 96Ru | 90Ru |
45 | 97Rh | 90Rh |
46 | 98Pd | 90Pd |
47 | 99Ag | |
48 | 100Cd | |
49 | 101In | |
50 | 102Sn | |
51 | 103Sb |
[1] - S. Musilli, N. Nicolas, Z. El Ali et al.:
DNA damage induced by Strontium-90 exposure at low concentrations in mesenchymal stromal cells: the functional consequences.
In: Scientific Reports, (2017), DOI 10.1038/srep41580.
Last update: 2023-08-10
Perma link: https://www.chemlin.org/isotope/strontium-90
© 1996 - 2024 ChemLin