Characterization of the proposed 4-alpha cluster state candidate in O-16

K. C. W. Li*, R. Neveling, P. Adsley, P. Papka, F. D. Smit, J. W. Brummer, C. Aa. Diget, M. Freer, M. N. Harakeh, Tz. Kokalova, F. Nemulodi, L. Pellegri, B. Rebeiro, J. A. Swartz, S. Triambak, J. J. van Zyl, C. Wheldon

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

15 Citaten (Scopus)
6 Downloads (Pure)


The O-16(alpha, alpha') reaction was studied at theta(lab) = 0 degrees at an incident energy of E-lab = 200 MeV using the K600 magnetic spectrometer at iThemba LABS. Proton decay and a 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 theta(+)(6) state in O-16 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 Ex approximate to 15 MeV that does not exhibit a theta(+) character. This unresolved resonance may have contaminated previous observations of the theta(+)(6) state.

Originele taal-2English
Aantal pagina's6
TijdschriftPhysical Review C
Nummer van het tijdschrift3
StatusPublished - 3-mrt-2017

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