2^{+} excitation of the ^{12}C Hoyle state

Martin Freer, H Fujita, Z Buthelezi, J Carter, RW Fearick, SV Förtsch, R Neveling, SM Perez, P Papka, FD Smit, JA Swartz, I Usman

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A high-energy-resolution magnetic spectrometer has been used to measure the C-12 excitation energy spectrum to search for the 2(+) excitation of the 7.65 MeV, 0(+) Hoyle state. By measuring in the diffractive minimum of the angular distribution for the broad 0(+) background, evidence is found for a possible 2(+) state at 9.6(1) MeV with a width of 600(100) keV. The implications for the Be-8 + He-4 reaction rate in stellar environments are discussed.
Original languageEnglish
Article number041303
Pages (from-to)n/a
JournalPhysical Review C
Issue number4
Publication statusPublished - 1 Oct 2009


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