Isotopes of boron
naturally occurs as isotopes and, the latter of which makes up about 80% of natural boron. There are 13 radioisotopes that have been discovered, with mass numbers from 7 to 21, all with short half-lives, the longest being that of, with a half-life of only and with a half-life of. All other isotopes have half-lives shorter than. Those isotopes with mass below 10 decay into helium while those with mass above 11 mostly become carbon.
List of isotopes
Boron-8
Boron-8 is an isotope of boron that undergoes β+ decay to beryllium-8 with a half-life of. It is the strongest candidate for a halo nucleus with a loosely-bound proton, in contrast to neutron halo nuclei such as lithium-11.Although boron-8 beta decay neutrinos from the Sun make up only about 80 ppm of the total solar [neutrino flux], they have a higher energy centered around 10 MeV, and are an important background to dark matter Weakly [interacting massive particles#Direct detection|direct detection] experiments. They are the first component of the neutrino floor that dark matter direct detection experiments are expected to eventually encounter.