A stringent upper limit on the direct 3$\alpha$ decay of the Hoyle State in ${}^{12}$C

R. Smith, M. Gai, M. W. Ahmed +4

We investigate an implication of the most recent observation of a second $J^{\pi }=2^{+}$ state in ${}^{12}$C, which was measured using the ${}^{12}$C($\gamma$,$\alpha$)${}^8$Be${}_{\text{(g.s.)}}$ reac…