IMPURITY EFFECTS IN $_\Lambda^{12}{\rm{Be}}$ AND $_\Lambda^{21}{\rm{Ne}}$ HYPERNUCLEI

The structures of the ground and low-lying states of and hypernuclei are studied with AMD. By a Λ hyperon, the parity reversion of the ground state and binding of the unbound α + 16O cluster state in are found. Furthermore, intra-band B(E2) reduction in the band of is larger than that in the band, because of the reduction of the inter-cluster distance between α and 16O cluster of the band.