strontium-90
Sign in to saveAlso known as Sr-90, 90Sr, strontium Sr-90
Strontium-90 () is a radioactive isotope of strontium produced by nuclear fission, with a half-life of 28.91years. It undergoes β decay into with a decay energy of 0.546MeV. has applications in medicine and industry and is an isotope of concern in fallout from nuclear weapons, nuclear weapons testing, and nuclear accidents.
Key facts
- Isotope.symbol
- Sr
- Isotope.image
- Strontium 90 (test source) in tin.jpg
- Isotope.image_caption
- Strontium-90 test source in tin
- Isotope.mass_number
- 90
- Isotope.mass
- 89.907728
- Isotope.num_neutrons
- 52
- Isotope.num_protons
- 38
- Isotope.abundance
- syn
- Isotope.decay_product
- yttrium-90
- Isotope.decay_symbol
- Y
- Isotope.decay_mass
- 90
- Isotope.decay_mode1
- Beta decay
- Isotope.decay_energy1
- 0.546
via Wikipedia infobox
Wikidata facts
- Mass
- 89.908
Show 10 more facts
- neutron number
- 52
- atomic number
- 38
- half-life
- 28.9
- spin quantum number
- 0.0
- parity quantum number
- 1
- mass excess
- -85948.127
- binding energy
- 782637.48
- isomeric SMILES
- [90Sr]
- canonical SMILES
- [Sr]
- chemical formula
- Sr
Sources (6)
via Wikidata · CC0
~8 min read
Article
16 sectionsContents
- Radioactivity
- Fission product
- Nuclear waste
- Remediation
- Biological effects
- Biological activity
- Uses
- Radioisotope thermoelectric generators (RTGs)
- Industrial applications
- Medical applications
- Aerospace applications
- Radiological warfare
- <sup>90</sup>Sr contamination in the environment
- See also
- References
- External links
Strontium-90 () is a radioactive isotope of strontium produced by nuclear fission, with a half-life of 28.91years. It undergoes β decay into with a decay energy of 0.546MeV. has applications in medicine and industry and is an isotope of concern in fallout from nuclear weapons, nuclear weapons testing, and nuclear accidents.
==Radioactivity== Naturally occurring strontium () is nonradioactive and nontoxic at levels normally found in the environment, but is a radiation hazard. undergoes β decay with a half-life of 28.91years and a decay energy of 0.546MeV distributed to an electron, an antineutrino, and the yttrium isotope , which in turn undergoes β decay with a half-life of 64.05hours and a decay energy of 2.28MeV distributed to an electron, an antineutrino, and occasionally a gamma ray, leaving stable . The gamma-emitting branches are so weak that for most purposes and can be considered pure beta particle emitters.