Angular momenta of intermediate width structures inC12+O

Abstract

Intermediate width resonance-like structures in the ' C+'~0 system have been studied via inelastic scattering to the 'so(02+) state. The dominant partial waves contributing to several structures have been determined by analysis of excitation functions at zeros of Legendre polynomials.The results disagree vrith spins extracted from angular correlation measurements in non-spin-zero channels.Measurement of the spins of proposed intermediate width structure resonances in elastic and inelastic-scattering channels has proven to be one of the most challenging problems in the study of heavy ion scattering at energies up to a few times the Coulomb barrier. Since competing dynamical models often differ on the angular momenta of the resonating amplitudes (for example, because of different couplings between elastic and inelastic channels), a reliable determination of resonance spins is necessary for discriminating among such models and/or for determining the parameters characterizing a given model. On a more basic level, the ability to characterize each structure in

Angular correlation, spin alignment, and systematics of mis-matched 12C+12C inelastic scattering resonances

“…= 40 • , however, the angular distributions were closely in phase with a Legendre polynomial of order 14. Furthermore, an analysis of the angular distributions of the type suggested by Balamuth et al [24] and Chapuran et al [25] at angles corresponding to zeroes of Legendre polynomials for these backward angles suggested that the backward-angle data were more consistent with l = 14 than with any other partial wave. Clearly, the results for the current resonance in the mismatched 0 + 2 + 2 + 1 channel are different from those of the more well-matched 0 + 1 + 2 + 1 , 2 + 1 + 2 + 1 , and 3 − 1 + 0 + 1 excitations.…”