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Beryllium-8 (8Be, Be-8) is a 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 8.19×10−17 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.

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  • Beryllium-8 (en)
  • Béryllium 8 (fr)
  • Berillio-8 (it)
  • ベリリウム8 (ja)
  • Beryllium-8 (nl)
  • Бериллий-8 (ru)
  • 鈹-8 (zh)
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  • Beryllium-8 (8Be, Be-8) is a 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 8.19×10−17 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. (en)
  • ベリリウム8 (Beryllium-8・8Be) とは、ベリリウムの同位体の1つ。 (ja)
  • Beryllium-8 of 8Be is een uiterst onstabiele radioactieve isotoop van beryllium. De isotoop komt van nature niet op Aarde voor, maar wordt in kleine hoeveelheden aangetroffen in de kern van sterren. (nl)
  • Il berillio-8 è un isotopo del metallo berillio. È un isotopo instabile con 4 neutroni e decade rapidamente in due nuclei di elio-4, ovvero due particelle alfa. È un nuclide cruciale nella nucleosintesi stellare, perché è un tramite nella produzione del carbonio-12 nel noto processo tre alfa. (it)
  • Бериллий-8 — нестабильный изотоп бериллия. Ядро бериллия-8 состоит из четырёх протонов и четырёх нейтронов. Он распадается на две альфа-частицы с периодом полураспада 10−16 секунд. Свойства бериллия-8 привели к предположениям о тонкой настройке Вселенной. (ru)
  • 鈹-8,是鈹的一種同位素。有4個中子和質子。鈹-8是一個放射性同位素,半衰期極短,極為不穩定。它的半衰期为8.19(37)×10−17 秒,会衰变成两个阿尔法粒子;这在恒星核合成中具有重要的意义,因为它在创建更重的化学元素时产生了瓶颈。 8Be的性质也引发了对宇宙的微调的猜测,关于宇宙演化的理论研究认为8Be应该保持稳定。 (zh)
  • Le béryllium 8, noté 8Be, est l'isotope du béryllium dont le nombre de masse est égal à 8 : son noyau atomique compte 4 protons et 4 neutrons avec un spin 0+ pour une masse atomique de 8,005 305 1 g/mol. Il est caractérisé par un excès de masse de 4 941,6 keV et une énergie de liaison nucléaire par nucléon de 7 062,43 keV. Il s'agit d'un nucléide α, dont le noyau est très instable et se désintègre par radioactivité α en émettant deux particules α, c'est-à-dire deux noyaux 42He, avec une période radioactive de l'ordre de 8,19 × 10−17 s. (fr)
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