- Conference date: 20-25 June 2005
- Location: Debrecen (Hungary)
Highly‐excited single‐particle states in nuclei are coupled with the excitations of a more complex character, first of all with collective phonon‐like modes of the core. In the framework of the quasiparticle‐phonon model we consider the structure of resulting complex configurations using the 1k 17/2 orbital in 209 Pb as an example. The eigenstates of the model carry significant degree of complexity that can be quantified with the aid of correlational invariant entropy. With artificially enhanced particle‐core coupling, the system undergoes the doubling phase transition with the quasiparticle strength concentrated in two repelling peaks.
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