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dc.contributor.authorAlhassid, Yoram
dc.contributor.authorÖzen, Cem
dc.contributor.authorNakada, Hitoshi
dc.date.accessioned2019-06-27T08:04:18Z
dc.date.available2019-06-27T08:04:18Z
dc.date.issued2012
dc.identifier.isbn9780735411005
dc.identifier.issn0094-243X
dc.identifier.urihttps://hdl.handle.net/20.500.12469/922
dc.identifier.urihttps://doi.org/10.1063/1.4759421
dc.description.abstractThe mean-field approximation predicts pairing and shape phase transitions in nuclei as a function of temperature or excitation energy. However in the finite nucleus the singularities of these phase transitions are smoothed out by quantal and thermal fluctuations. An interesting question is whether signatures of these transitions survive despite the large fluctuations. The shell model Monte Carlo (SMMC) approach enables us to calculate the statistical properties of nuclei beyond the mean-field approximation in model spaces that are many orders of magnitude larger than spaces that can be treated by conventional diagonalization methods. We have extended the SMMC method to heavy nuclei and used it to study the transition from vibrational (spherical) to rotational (deformed) nuclei in families of rare-earth isotopes. We have calculated collective enhancement factors of level densities as a function of excitation energy and found that the decay of the vibrational and rotational enhancements is well correlated with the pairing and shape phase transitions respectively.
dc.language.isoEnglish
dc.publisherAmer Inst Physics
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectPhase transitions
dc.subjectNuclear shell model
dc.subjectQuantum Monte Carlo methods
dc.titleSignatures of phase transitions in nuclei at finite excitation energies
dc.typeProceedings Paper
dc.identifier.startpage386
dc.identifier.endpage393
dc.relation.journalAIP Conference Proceedings
dc.identifier.volume1488
dc.identifier.wosWOS:000310687200045
dc.identifier.doi10.1063/1.4759421
dc.contributor.khasauthorÖzen, Cem


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