Speaker
Description
We have studied the structure of the proton-rich 14O nucleus by performing the 10C + α elastic scattering measurement at the CRIB facility (CNS, the university of Tokyo). Recently, the cluster nature for some resonances was identified in the mirror nucleus 14C via the 10Be + α reaction (1). A preliminary Resonating Group Method (RGM) calculation has suggested that also the 10C + α system may present resonances with a large reduced width, an indication of clustering effects. The radioactive beam of 1OC was produced at CRIB using the 10B(p,n)10C reaction, using a 10B primary beam with energy 69.9 MeV (AVS cyclotron, RIKEN). The primary target was H2 at 400 Torr and 77K. The secondary beam 10C was produced at 36 MeV with a beam purity better than 97%. The gas chamber was filled with helium gas at 650 Torr and sealed with the Mylar window. Three DeltaE-E silicon detector telescopes were used in the gas chamber at different angles.
By measuring the protons and the α particles, a complex resonant structure for 14O was observed in the excitation energy region 13-18 MeV. By performing an R-matrix analysis of the elastic scattering data at several angles, some evidence of alpha clustering in 0+ and 2+ states has been observed, in fair agreement with the microscopic cluster model.
A better understanding of the nuclear structure of this nuclear mass region is relevant for future nuclear astrophysical studies.
(1) H. Yamaguchi et al., Physics Letters B 766, 11 (2017)
