Capability of the generator coordinate method combined with angular momentum projection

The generator coordinate method (GCM) with triaxial angular monetum project ion is applied to a single j-shell model with a microscopic quadrupole-quad rupole interaction. It is confirmed that the GCM reproduces exactly the she ll model level schemes of the excited states for the 4-hole (and also 4-par ticle) systems in the single j-shell model. It is shown that the triaxial a ngular momentum projection plays an essential role in taking account of lar ge contributions from triaxially deformed configurations to the physical st ates.