부산대학교 도서관

The matter radius of the doubly magic 56 Ni was extracted from a measurement of the differential cross section by employing, for the first time, elastic proton scattering in inverse kinematics with a radioactive beam at E kin = 390.2 MeV/nucleon circulating in a storage ring and passing an internal hydrogen gas-jet target with a revolution frequency of around 2 MHz. The novel experimental scheme is based on UHV-compatible Si detectors operated as active vacuum windows, which were implemented in the ESR storage ring at GSI. A matter radius < r m 2 > 1 / 2 = 3. 74 - 0.06 + 0.03 fm was extracted for the doubly-magic self-conjugate nucleus 56 Ni. [ABSTRACT FROM AUTHOR]