Search for 28Si cluster states through the 12C+16O radiative capture

TL;DR

This study investigates the 12C+16O radiative capture reaction near the Coulomb barrier, revealing new decay pathways through 28Si states and measuring previously unobserved capture cross-sections.

Contribution

It reports the first observation of decay paths through 28Si doorway states and provides new measurements of capture cross-sections at energies around 15-21 MeV.

Findings

Discovery of decay paths through 28Si doorway states.

Measurement of new capture cross-sections.

Selective feeding of specific 28Si states.

Abstract

The 12C+16O resonant radiative capture reaction has been studied at 5 bombarding energies between Elab = 15.4 and 21.4 MeV, around the Coulomb barrier, at the Triumf laboratory (Vancouver, Canada) using the Dragon 0{\deg} spectrometer and the associated BGO array. The most remarquable result is the previously unobserved decay path through 28Si doorway states of energies around 12 MeV leading to the measurement of new capture cross-sections. The feeding of specific, deformed states in 28Si from the resonances is discussed, as well as the selective feeding of 1^+ T=1 states around 11 MeV.