Collective modes of tri-nuclear molecules of the type Sr-96+Be-10+Ba-146

The collective modes of the tri-nuclear molecule Sr-96 + Be-10 + Ba-146, ob served in recent cold fission decay of Cf-252 into three clusters, are theo retically investigated, The main excitations are rotations, the butterfly a nd belly-dancer modes and beta- and gamma-vibrations. Due to the presence o f the Be nucleus, butterfly excitation energies are shifted up to 2 MeV. Th ere are only a few collective states below 1 MeV which are not rotational. The first rotational level of spin 2(+) lies at an energy of about 6 keV. P roposals of how these collective modes may be measured are suggested.