Fission Modes ofMg24

Coincidence measurements of electrodisintegration products have been used to simultaneously study the ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$+${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$+${}_{}{}^8{}_{}{}^{}\mathrm{Be}$, and ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$+$\alpha$ decay channels of ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$. Asymmetric fission into ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$+${}_{}{}^8{}_{}{}^{}\mathrm{Be}$, is concentrated between 18 and 28 MeV in ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$ and exhibits resonances with cross sections ten times those of symmetric fission. There is little correlation among resonances in the three decay channels. The fission yields are not consistent with statistical decays from giant resonances, and suggest highly clustered states in ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$.