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Shell model description of heavy nuclei and abnormal collective motions
KTH.
2018 (English)In: EPJ Web of Conferences, EDP Sciences, 2018, Vol. 178, article id 02015Conference paper, Published paper (Refereed)
Abstract [en]

In this contribution I present systematic calculations on the spectroscopy and electromagnetic transition properties of intermediate-mass and heavy nuclei around 100Sn and 208Pb. We employed the large-scale configuration interaction shell model approach with realistic interactions. Those nuclei are the longest isotopic chains that can be studied by the nuclear shell model. I will show that the yrast spectra of Te isotopes show a vibrational-like equally spaced pattern but the few known E2 transitions show rotational-like behaviour. These kinds of abnormal collective behaviors cannot be reproduced by standard collective models and provide excellent background to study the competition of single-particle and various collective degrees of freedom. Moreover, the calculated B(E2) values for neutron-deficient and heavier Te isotopes show contrasting different behaviours along the yrast line, which may be related to the enhanced neutron-proton correlation when approaching N=50. The deviations between theory and experiment concerning the energies and E2 transition properties of low-lying 0+ and 2+ excited states and isomeric states in those nuclei may provide a constraint on our understanding of nuclear deformation and intruder configuration in that region.

Place, publisher, year, edition, pages
EDP Sciences, 2018. Vol. 178, article id 02015
Series
EPJ Web of Conferences, ISSN 2101-6275
National Category
Other Physics Topics
Identifiers
URN: urn:nbn:se:kth:diva-230039DOI: 10.1051/epjconf/201817802015Scopus ID: 2-s2.0-85047977783OAI: oai:DiVA.org:kth-230039DiVA, id: diva2:1216037
Conference
16th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics, CGS 2017, Shanghai Jiao Tong UniversityShanghai, China, 18 September 2017 through 22 September 2017
Note

QC 20180611

Available from: 2018-06-11 Created: 2018-06-11 Last updated: 2018-06-11Bibliographically approved

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  • apa
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