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A microscopic multiphonon approach to even and odd nuclei
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SYSNO ASEP 0477317 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title A microscopic multiphonon approach to even and odd nuclei Author(s) De Gregorio, G. (IT)
Knapp, F. (CZ)
Lo Iudice, N. (IT)
Veselý, Petr (UJF-V) ORCID, SAINumber of authors 4 Article number 074003 Source Title Physica Scripta. - : Institute of Physics Publishing - ISSN 0031-8949
Roč. 92, č. 7 (2017)Number of pages 8 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords E1 response in nuclei ; nuclear many-body theory ; nuclear structure Subject RIV BE - Theoretical Physics OECD category Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect) R&D Projects GA13-07117S GA ČR - Czech Science Foundation (CSF) Institutional support UJF-V - RVO:61389005 UT WOS 000403349800003 EID SCOPUS 85021234384 DOI 10.1088/1402-4896/aa6fa2 Annotation The formalism of an equation of motion phonon method is briefly outlined. In even-even nuclei, the method derives equations of motion which generate an orthonormal basis of correlated n-phonon states (n = 0, 1, 2,...), built of constituent Tamm-Dancoff phonons, and, then, solves the nuclear eigenvalue problem in such a multiphonon basis. In odd nuclei, analogous equations yield a basis of correlated orthonormal multiphonon particle-core states to be used for the solution of the full eigenvalue equations. The formalism does not rely on approximations, but lends itself naturally to simplifying assumptions. As illustrated here, the method has been implemented numerically for studying the electric dipole response in the heavy neutron rich Pb-208 and Sn-132 and in the odd O-17 and F-17. Self-consistent calculations, using a chiral inspired Hamiltonian, have confirmed the important role of the multiphonon states in enhancing the fragmentation of the strength in the giant and pygmy resonance regions consistently with the experimental data. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2018
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