4 ms·
https://en.m.wikipedia.org/wiki/Aneutronic_fusion https://en.m.wikipedia.org/wiki/Aneutronic_fusion lists it as an example, along with other reactions that also
by Arnavion 5y ago
https://en.m.wikipedia.org/wiki/Aneutronic_fusion https://en.m.wikipedia.org/wiki/Aneutronic_fusion lists it as an example, along with other reactions that also all result in the fused nucleus decaying into alpha particles.