Inelastic scattering from 12C has been measured at extremely forward angles including 0 using 386 MeV α particles to study the α-cluster states around Ex ∼ 10 MeV, especially the 2 + state predicted by the α-cluster model. We have analyzed (α,α′) cross-section data using both peak-fitting and multipole decomposition techniques. A 2+ state at Ex= 9.84 ± 0.06 MeV with a width of 1.01 ± 0.15 MeV is found to be submerged in the broad 0+ state at Ex= 9.93 ± 0.03 MeV with a width of 2.71 ± 0.08 MeV. This 2+ state may be interpreted as the 2+ excitation of the Hoyle state and the α-condensate state.
ASJC Scopus subject areas
- Nuclear and High Energy Physics