The key point of fragmentation of quasiparticle-phonon configurations in the order-disorder transformations of atomic nuclei

To find out at what excitation energies the order-disorder transformations occur in intermediate and heavy nuclei, it is suggested to study fragmentation of multiquasiparticle and quasiparticle-phonon configurations. One-nucleon transfer reactions on odd-odd targets, for instance on 176Lu and 180Ta, should be taken as a particular case of fragmentation of three-quasiparticle configurations on the long living isomer 178m2Hf-fragmentation of five-quasiparticle configurations. From the analysis of γ-decay of high-spin isomers one can information on fragmentation of quasi-phonon configurations