yttrium-90
Sign in to saveAlso known as Y-90, 90Y, Yttrium (90 Y), Yttrium Y 90, Yttrium Y-90
Yttrium-90 () is a radioactive isotope of yttrium. Yttrium-90 has found a wide range of uses in radiation therapy to treat some forms of cancer. It is sometimes called radioyttrium (as might be other radioisotopes of the element).
Key facts
- Isotope.image
- Yttrium-90.svg
- Isotope.symbol
- Y
- Isotope.mass_number
- 90
- Isotope.num_neutrons
- 51
- Isotope.num_protons
- 39
via Wikipedia infobox
~4 min read
Encyclopedic overview
9 sectionsContents
- Decay
- Production
- Medical application
- Post-treatment imaging
- Bremsstrahlung imaging after <sup>90</sup>Y therapy
- Positron imaging after <sup>90</sup>Y therapy
- See also
- References
- External links
Yttrium-90 () is a radioactive isotope of yttrium. Yttrium-90 has found a wide range of uses in radiation therapy to treat some forms of cancer. It is sometimes called radioyttrium (as might be other radioisotopes of the element).
==Decay== undergoes β− decay to zirconium-90 with a half-life of 64.05 hours and a decay energy of 2.28 MeV with an average beta energy of 0.9336 MeV. Although it decays to the 1.7 MeV excited 0+ state of 90Zr with frequency more than 0.01%, emission of a gamma ray is forbidden and the normal decay of that state is internal conversion; the alternative of pair production has been the subject of study for potential use, despite its rarity. The useful photons emitted through this isotope's decay are instead bremsstrahlung X-rays.
Excerpted from Wikipedia’s “yttrium-90” article, available under the CC BY-SA 4.0 licence.