Abstract
Excited states in nuclei have been studied via in-beam -ray spectroscopy with multinucleon removal reactions. Intense radioactive beams of and provided at the new facility of the RIKEN Radioactive Isotope Beam Factory enabled coincidence measurements. A prominent line observed with an energy of 742(8) keV in confirms the state reported in an earlier study. Among the lines observed in coincidence with the transition, the most probable candidate for the transition from the yrast state was identified, leading to a energy of 2173(14) keV. The energy ratio of 2.93(5) between the and states indicates well-developed deformation in at and . Also for energy ratios with values of 2.09(5) and 2.56(5) were obtained. Together with the ratio for , the results show a rapid deformation development of Si isotopes from to .
- Received 26 July 2012
DOI:https://doi.org/10.1103/PhysRevLett.109.182501
© 2012 American Physical Society