A 1987 Soviet stamp celebrating the T-15 tokamak depicts the helium-5 nucleus during deuterium-tritium fusion Though all heavier helium isotopes decay with a half-life of <1 second, particle accelerator collisions have been used to create unusual nuclei of elements such as helium, lithium, and nitrogen.

Helium-5 is an isotope of the element helium, which consists of two protons and three neutrons in the nucleus.

氦-5（Helium-5），是氦的 同位素 之一，元素符号为5He，其半衰期为0.6MeV。 它的原子核由二颗质子和三颗中子所组成。 并带有放射性，会放出中子，其半衰期为0.6MeV。 氦-5（Helium …

Detailed decay information for the isotope helium-5 including decay chains and daughter products.

Helium-5 of 5He is een onstabiele radioactieve isotoop van helium, een edelgas. Helium-5 vervalt door neutronemissie naar de stabiele isotoop helium-4: De halveringstijd is extreem kort: 7 × 10 −13 nanoseconden. De isotoop komt dan ook van nature niet op Aarde voor.

Its unique properties come from its unique nuclear composition. It is through attaining an understanding and appreciation of the chemistry involved with helium-5 that we can begin to comprehend the amazing benefits it presents to not only the US, but also the whole world. Tweet

Helium-5 is an exotic helium isotope having 2 protons and 3 neutrons. It appears as an intermediate product in the process of deuterium-tritium fusion, and decays within 7×10^-22 seconds into helium-4, a free neutron, and about 17 million electron volts of kinetic energy.

Helium-5 ist ein Isotop des Elements Helium, das aus zwei Protonen und drei Neutronen im Atomkern besteht.

2020年2月28日 · Helium has seven known isotopes, ranging from He-3 to He-9. Most of these isotopes have multiple decay schemes where the decay type depends on the overall energy of …

Helium-5 is an isotope of helium. It decays to Helium-4. Its half-life is 7E-22 sec. Technically, He 5 is not an isotope of He because it does not survive long enough to qualify as a nuclide. It is a nuclear drop, sometimes called a "resonance".