Isotopes of astatine

  • main isotopes of astatine (85at)
    iso­tope decay
    abun­dance half-life (t1/2) mode pro­duct
    209at syn 5.41 h β+ 209po
    α 205bi
    210at syn 8.1 h β+ 210po
    α 206bi
    211at syn 7.21 h ε 211po
    α 207bi

    astatine (85at) has 39 known isotopes, all of which are radioactive; the range of their mass numbers is from 191 to 229. there also exist 23 metastable excited states. the longest-lived isotope is 210at, which has a half-life of 8.1 hours; the longest-lived isotope existing in naturally occurring decay chains is 219at with a half-life of 56 seconds.

  • list of isotopes
  • alpha decay
  • see also
  • references

Main isotopes of astatine (85At)
Iso­tope Decay
abun­dance half-life (t1/2) mode pro­duct
209At syn 5.41 h β+ 209Po
α 205Bi
210At syn 8.1 h β+ 210Po
α 206Bi
211At syn 7.21 h ε 211Po
α 207Bi

Astatine (85At) has 39 known isotopes, all of which are radioactive; the range of their mass numbers is from 191 to 229. There also exist 23 metastable excited states. The longest-lived isotope is 210At, which has a half-life of 8.1 hours; the longest-lived isotope existing in naturally occurring decay chains is 219At with a half-life of 56 seconds.