-cluster structure of
- Additional Document Info
- View All
Background: Clustering phenomena in NZ nuclei provide an opportunity to understand the interplay between cluster and nucleon degrees of freedom. Purpose: To study resonances in the 18O spectrum, populated in 14C+ elastic scattering. Method: The thick target inverse kinematics technique was used to measure the excitation function for the 14C+ elastic scattering. A 42-MeV 14C beam was used to populate states of excitation energy up to 14.9 MeV in 18O. The analysis was performed using a multilevel, multichannel R-matrix approach. Results: Detailed spectroscopic information, including spin parities, partial - and neutron-decay widths and dimensionless reduced widths, was obtained for excited states in 18O between 8 and 14.9 MeV in excitation energy. Cluster-nucleon configuration interaction model calculations of the same quantities are performed and compared to the experimental results. Conclusions: Strong fragmentation of large -cluster strengths is observed in the spectrum of 18O, making the -cluster structure of 18O quite different from the pattern of known quasirotational bands of alternating parity that are characteristic of N=Z, even-even nuclei like 16O and 20Ne. 2014 American Physical Society.
author list (cited authors)
Avila, M. L., Rogachev, G. V., Goldberg, V. Z., Johnson, E. D., Kemper, K. W., Tchuvil'sky, Y. M., & Volya, A. S.