No-core MCSM calculation for 10Be and 12Be low-lying spectra

Abstract

The low-lying excited states of 10Be and 12Be are investigated within a no-core Monte Carlo Shell Model (MCSM) framework employing a realistic potential obtained via the Unitary Correlation Operator Method. The excitation energies of the 21+ and 22+ states and the B(E2; 21,2+ → 0 g.s.+) for 10Be in the MCSM with a standard treatment of spurious center-of-mass motion show good agreement with experimental data. Some properties of low-lying states of 10Be are studied in terms of quadrupole moments and E2 transitions. The E2 transition probability of 10C, the mirror nucleus of 10Be, is also presented with a good agreement to experiment. The triaxial deformation of 10Be and 10C is discussed in terms of the B(E2) values.