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The 12C excitation energy spectra populated in both proton and α-particle inelastic scattering measurements are examined. The data indicate the existence of a 2 state at E =9.75(0.15) MeV with a width of 750(150)keV. It is believed that this state corresponds to the 2 excitation of the 7.65 MeV, 0 , Hoyle state, which acts as the main path by which carbon is synthesized in stars. A simultaneous R-matrix analysis of the two sets of data indicates that the 2 state possesses a very large α-reduced width, approaching the Wigner limit. This would indicate that the state is associated with a highly clustered structure. The potential geometric arrangements of the clusters is discussed.
|Journal||Physical Review C|
|Publication status||Published - 14 Sept 2012|
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- 1 Finished
Birmingham Nuclear Physics Consolidated Grant
Freer, M., Evans, P., Jones, P., Wheldon, C. & Lazzeroni, C.
SCIENCE & TECHNOLOGY FACILITIES COUNCIL
1/08/11 → 31/07/14
Project: Research Councils