QUADRUPOLE DEFORMATION β AND γ CONSTRAINT IN A FRAMEWORK OF ANTISYMMETRIZED MOLECULAR DYNAMICS
We propose a new method of the β-γ constraint for quadrupole deformation in antisymmetrized molecular dynamics (AMD) to describe various cluster and shell-model structures in the ground and excited states of light nuclei. To check its applicability, we apply this method to N = 6 isotones, 10 Be , 12 C , 9 Li , and 11 B , and find various shell-model and cluster structures as functions of the deformation parameters, β and γ. We also investigate 14 C with the β-γ constraint AMD. For positive-parity states, above the ground band, three excited bands with the developed 3α-cluster core structures are suggested. Characteristic structures such as a triaxial structure and a linear-chain structure having 10 Be +α correlation appear in the excited bands.