Reexamination of the excited states of C-12

Freer M., Boztosun I., Bremner C. A., Chappell S. P. G., Cowin R. L., Dillon G. K., ...More

PHYSICAL REVIEW C, vol.76, no.3, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 76 Issue: 3
  • Publication Date: 2007
  • Doi Number: 10.1103/physrevc.76.034320
  • Journal Name: PHYSICAL REVIEW C
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Akdeniz University Affiliated: No

Abstract

An analysis of the C-12(C-12,3 alpha)C-12 reaction was made at beam energies between 82 and 106 MeV. Decays to both the ground state and the excited states of Be-8 were isolated, allowing states of different characters to be identified. In particular, evidence was found for a previously observed state at 11.16 MeV. An analysis of the angular distributions of the unnatural parity states at 11.83 and 13.35 MeV, previously assigned J(pi)=2(-), calls into question the validity of these assignments, suggesting that at least one of the states may correspond to J(pi)=4(-). Evidence is also found for 1(-) and 3(-) strengths associated with broad states between 11 and 14 MeV.