Abstract
12 C and 16 0 nuclei has been too large compared with the experimental data, and it has not been possible to describe these nuclei reasonably by the same effective interaction simultaneously. In this paper, we apply the Na-cluster model so as to clarify what is the most essential problem in the description of 12 C and 16 0 by using a very large functional space and various effective interactions. This procedure is carried out by combining frameworks of the constraint cooling method introduced in Antisymmetrized Molecular Dynamics (AMD) and generator coordinate method (GCM). The resultant energy levels of 16 0 show that various effective interactions give the second o+ state of 16 0 just around the 12 C+a threshold energy. This result agrees with the picture of the Ikeda diagram. However, even if we use some density dependent interactions, the binding energy difference between 12 C and 16 0 cannot be remarkably improved.
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