(sd)2states inBe12

Study of 14Be with core excitation

“…The 14 Be nucleus is a good candidate for having a neutron halo structure and both 14 Be and its subsystem 13 Be have been the subject of several recent experiments and theoretical calculations. In this work we perform a simultaneous study of the properties of both 13 Be and 14 Be, described as few-body systems with a 12 Be core and one-or two-neutrons.…”

“…In this work we perform a simultaneous study of the properties of both 13 Be and 14 Be, described as few-body systems with a 12 Be core and one-or two-neutrons. The 12 Be core is assumed rotational and is allowed to excite to its first 2 + state.…”

“…These few-body structure models rely on a knowledge of the underlying potentials between the constituents and hence on the structures of each of the underlying two-body subsystems. To understand 14 Be one must at the same time understand 13 Be.…”

“…The known experimental information on the 14 Be, 13 Be and 12 Be nuclei is outlined below and the results of some earlier theoretical descriptions are discussed. The two-neutron separation energy of 14 Be has been the subject of two experiments.…”

Precise Lifetime Measurements in Light Nuclei for Benchmarking Modern Ab-initio Nuclear Structure Models

“…As the neutrons in 10 Be seem quite inert, one may naively expect 12 Be to be very similar in structure and radiation pattern. In fact nature is not that simple, the first excited state falls from 3368 keV to 2102 keV [31] (see Fig. 2 (top)), which for a nuclear liquid drop would suggest a big increase in inertia, usually associated with elongation.…”