Beryllium-8

  • beryllium-8, 8be
    鈹-8.svg
    general
    symbol8be
    namesberyllium-8, be-8
    protons4
    neutrons4
    nuclide data
    natural abundance0[a]
    half-life8.19(37)×10−17 s
    decay products4he
    isotope mass8.00530510(4) u
    spin0
    decay modes
    decay modedecay energy (mev)
    α(91.84±4)×10−3[2]
    isotopes of beryllium
    complete table of nuclides

    beryllium-8 (8be, be-8) is an unstable radionuclide with 4 neutrons and 4 protons. it is an unbound resonance and nominally an isotope of beryllium. it decays into two alpha particles with a half-life on the order of 10−16 seconds; this has important ramifications in stellar nucleosynthesis as it creates a bottleneck in the creation of heavier chemical elements. the properties of 8be have also led to speculation on the fine tuning of the universe, and theoretical investigations on cosmological evolution had 8be been stable.

  • discovery
  • properties
  • role in stellar nucleosynthesis
  • hypothetical universes with stable 8be
  • notes
  • references

Beryllium-8, 8Be
鈹-8.svg
General
Symbol8Be
Namesberyllium-8, Be-8
Protons4
Neutrons4
Nuclide data
Natural abundance0[a]
Half-life8.19(37)×10−17 s
Decay products4He
Isotope mass8.00530510(4) u
Spin0
Decay modes
Decay modeDecay energy (MeV)
α(91.84±4)×10−3[2]
Isotopes of beryllium
Complete table of nuclides

Beryllium-8 (8Be, Be-8) is an unstable radionuclide with 4 neutrons and 4 protons. It is an unbound resonance and nominally an isotope of beryllium. It decays into two alpha particles with a half-life on the order of 10−16 seconds; this has important ramifications in stellar nucleosynthesis as it creates a bottleneck in the creation of heavier chemical elements. The properties of 8Be have also led to speculation on the fine tuning of the Universe, and theoretical investigations on cosmological evolution had 8Be been stable.

Other Languages
interlingua: Beryllium-8
italiano: Berillio-8
Nederlands: Beryllium-8
日本語: ベリリウム8
中文: 鈹-8