Abstract
An inelastic excitation experiment was performed with a beam at 29 MeV/u on a carbon target. New resonances close to the respective cluster separation thresholds were observed in for the and decay channels, confirming the previously proposed molecular rotational bands. Using the model-independent angular correlation analysis, a spin parity is assigned to the remarkably large peak at 10.3 MeV in the channel. A distorted wave Born approximation (DWBA) calculation was compared to the experimental differential cross section of this state, resulting in a largely enhanced monopole transition matrix element of , in good agreement with the generalized two-center cluster model (GTCM) prediction assuming a preformed configuration. Together with the previously reported large cluster spectroscopic factor, the strong clustering in is well demonstrated. The detection focused on the most forward angles, by using a zero-deg telescope, is essential in the present measurement.
2 More- Received 15 December 2014
DOI:https://doi.org/10.1103/PhysRevC.91.024304
©2015 American Physical Society