Three-particle breakup of the isobaric analog state in F

J.C. Chow, A.C. Morton, R.E. Azuma, N. Bateman, R.N. Boyd, L. Buchmann, J.M. D'Auria, T. Davinson, M. Dombsky, W. Galster, E. Gete, U. Giesen, C. Iliadis, K.P. Jackson, J.D. King, G. Roy, T. Shoppa, A. Shorter

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Abstract / Description of output

We have studied the β-delayed particle decay of Ne to test the feasibility of determining both the E1 and E2 components of the C(α,γ)O cross section at energies relevant to helium burning in stars. In this context we have observed the breakup of the isobaric analog state in F at 11.193 MeV into three particles via three channels: proton decay to the 9.59 MeV state in O; and α decay to the 2.365 and 3.502/3.547 MeV states in N. This is the first reported observation of the decay of the IAS to the 1 state in O at 9.59 MeV and the first reported β-delayed proton-α decay. With straightforward improvements to our detection apparatus to improve angular resolution, β suppression, and solid angle coverage, we should be able to proceed to the measurement of the effect of the tail of the subthreshold state at 7.117 MeV in O on the a spectrum from the breakup of the 9.59 MeV state.
Original languageEnglish
JournalPhysical Review C
Issue number2
Publication statusPublished - 1 Feb 1998


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