Structure of Light Unstable Nuclei Studied with Antisymmetrized Molecular Dynamics

Abstract

Structures of light unstable nuclei, Li, Be, B, and C isotopes are systematically studied with a microscopic method of antisymmetrized molecular dynamics. The theoretical method is found to be very useful to study ground and excited states of various nuclei covering unstable nuclei. The calculations succeed to reproduce many experimental data for nuclear structures; energies, radii, magnetic dipole moments, electric quadrupole moments, transition strength. In the theoretical results it is found that various exotic phenomena in unstable nuclei such as molecular-like structures, neutron skin, and large deformations may appear in unstabel nuclei. We investigate the structure change with the increase of neutron number and with the increase of the excitation energies, and find the drastic changes between shell-model-like structures and clustering structures. The mechanism of clustering developments in unstable nuclei are discussed.

Correlated two-proton decay fromC10

“…The second is thought to be a collective rotation built on 0 + 2 (a state in the lower quadruplet). Microscopic four-cluster [33] and antisymmetrized molecular dynamics [34] indicate that this 0 + 2 level (well known in 10 Be and long sought in 10 C) is well described by an almost pure (sd) 2 character. Strong 1 S correlations between protons in the analog 10 C state and any rotational states built on this band-head, such as the 2 + , are to be expected.…”

Structure of Light Hypernuclei in the Framework of Fermionic Molecular Dynamics

“…We observed only negligible modifications of the nuclear core caused by the presence of Λ in s-shell hypernuclei 4 Λ H, 4 Λ He, and 5 Λ He. However, the modification is clearly noticeable in the pshell hypernucleus 7 Λ Li.…”

“…The theoretical approach introduced above was employed in FMD calculations of the ground and excited states of light Λ hypernuclei 4 Λ H, 4 Λ He, and 7 Λ Li in order to study potential model dependence as well as modifications of the nuclear core caused by the presence of the Λ hyperon.…”

“…The complex width parameter a k differs for each state, which is in contrast to the AMD [4] or HyperAMD [5] approaches. In case of bound states, all width parameters are numerically converged to real values after the energy variation.…”

“…In this contribution we present our calculations of the light s-shell hypernuclei 4 Λ He, 4 Λ H and p-shell hypernucleus 7 Λ Li, performed within recently developed the Fermionic Molecular Dynamics model extended to hypernuclei [3]. We used several rather simple V NN and V ΛN effective potentials in order to explore model dependence of our calculations.…”