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Understanding emergent collectivity and clustering in nuclei from a symmetry-based no-core shell-model perspective
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SYSNO ASEP 0475654 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Understanding emergent collectivity and clustering in nuclei from a symmetry-based no-core shell-model perspective Author(s) Dreyfuss, A. C. (US)
Launey, K. D. (US)
Dytrych, Tomáš (UJF-V) ORCID, SAI
Draayer, J. P. (US)
Baker, R. B. (US)
Deibel, C. M. (US)
Bahri, C. (US)Number of authors 7 Article number 044312 Source Title Physical Review C. - : American Physical Society - ISSN 2469-9985
Roč. 95, č. 4 (2017)Number of pages 12 s. Publication form Print - P Language eng - English Country US - United States Keywords C-12 ; no-core shell-model ; resonance 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 GA16-16772S GA ČR - Czech Science Foundation (CSF) Institutional support UJF-V - RVO:61389005 UT WOS 000399938800003 EID SCOPUS 85017288769 DOI 10.1103/PhysRevC.95.044312 Annotation We present a detailed discussion of the structure of the low-lying positive-parity energy spectrum of C-12 from a no-core shell-model perspective. The approach utilizes a fraction of the usual shell-model space and extends its multishell reach via the symmetry-based no-core symplectic shell model (NCSpM) with a simple, physically informed effective interaction. We focus on the ground-state rotational band, the Hoyle state, and its 2(+) and 4(+) excitations, as well as the giant monopole 0(+) resonance, which is a vibrational breathing mode of the ground state. This, in turn, allows us to address the open question about the structure of the Hoyle state and its rotational band. In particular, we find that the Hoyle state is best described through deformed prolate collective modes rather than vibrational modes, while we show that the higher lying giant monopole 0(+) resonance resembles the oblate deformation of the C-12 ground state. In addition, we identify the giant monopole 0(+) and quadrupole 2(+) resonances of selected light-and intermediate-mass nuclei, along with other observables of C-12, including matter rms radii, electric quadrupole moments, and E2 and E0 transition rates. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2018
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