Characterization of the proposed 4-{alpha} cluster state candidate in 16O Institutional Repository Document uri icon


  • The $mathrm{^{16}O}(alpha, alpha^{prime})$ reaction was studied at $ heta_{lab} = 0^circ$ at an incident energy of $ extrm{E}_{lab}$ = 200 MeV using the K600 magnetic spectrometer at iThemba LABS. Proton and $alpha$-decay from the natural parity states were observed in a large-acceptance silicon-strip detector array at backward angles. The coincident charged particle measurements were used to characterize the decay channels of the $0_{6}^{+}$ state in $mathrm{^{16}O}$ located at $E_{x} = 15.097(5)$ MeV. This state is identified by several theoretical cluster calculations to be a good candidate for the 4-$alpha$ cluster state. The results of this work suggest the presence of a previously unidentified resonance at $E_{x}approx15$ MeV that does not exhibit a $0^{+}$ character. This unresolved resonance may have contaminated previous observations of the $0_{6}^{+}$ state.

author list (cited authors)

  • Li, K., Neveling, R., Adsley, P., Papka, P., Smit, F. D., Brmmer, J. W., ... Wheldon, C.

citation count

  • 0

complete list of authors

  • Li, KCW||Neveling, R||Adsley, P||Papka, P||Smit, FD||Brümmer, JW||Diget, C Aa||Freer, M||Harakeh, MN||Kokalova, Tz||Nemulodi, F||Pellegri, L||Rebeiro, B||Swartz, JA||Triambak, S||van Zyl, JJ||Wheldon, C

Book Title

  • arXiv

publication date

  • October 2016