부산대학교 도서관

Abstract: By using the 1H(6Li, 6Be)n charge-exchange reaction, population of continuum states in 6Be was observed up to , being the 6Be energy above its three-body decay threshold. In kinematically complete measurements performed by detecting coincidences, an spectrum of high statistics was obtained, containing approximately events. The spectrum provides detailed correlation information about the well-known ground state of 6Be at and its state at . Moreover, a broad structure extending from 4 to 16 MeV was observed. It contains negative parity states populated by angular momentum transfer without other significant contributions. This structure can be interpreted as a novel phenomenon, i.e. the isovector soft dipole mode associated with the 6Li ground state. The population of this mode in the charge-exchange reaction is a dominant phenomenon for this reaction, being responsible for about of the cross-section obtained in the measured energy range. [Copyright &y& Elsevier]