Physical Review C, Nuclear Physics
Author:
Keywords:
Science & Technology, Physical Sciences, Physics, Nuclear, Physics, NEUTRON-RICH NUCLEI, INELASTIC-SCATTERING, COULOMB-EXCITATION, ISOTOPES, MODEL, DEFORMATION, STATES, BEAMS, TI-46, BETA, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, 5106 Nuclear and plasma physics
Abstract:
Low-lying excited states of 46 Ar have been studied via inverse-kinematics proton scattering with a thick target. Coupled-channels calculations have been used to extract the deformation length of the 2 + 1 state. This result, combined with existing Coulomb excitation data, yields a ratio of the neutron-to-proton transition matrix elements of M n /M p = 1 . 19(25) N/Z , showing a departure from the proton dominance observed in the N = 28 isotones above 48 Ca. The status of the N = 28 shell below 48 Ca is discussed