Reexamination of the excited states of C-12

Freer, M.; Boztosun, İSMAİL; Bremner, C.; Chappell, S.; Cowin, R.; Dillon, G.; Fulton, B.; Greenhalgh, B.; Munoz-Britton, T.; Nicoli, M.; Rae, W.; Singer, S.; Sparks, N.; Watson, D.; Weisser, D.

doi:10.1103/physrevc.76.034320

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., ...Daha Fazla

PHYSICAL REVIEW C, cilt.76, sa.3, 2007 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 76 Sayı: 3
Basım Tarihi: 2007
Doi Numarası: 10.1103/physrevc.76.034320
Dergi Adı: PHYSICAL REVIEW C
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Akdeniz Üniversitesi Adresli: Hayır

Özet

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.