Issue |
EPJ Web Conf.
Volume 178, 2018
16th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics (CGS16)
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Article Number | 02015 | |
Number of page(s) | 4 | |
Section | Nuclear Structure | |
DOI | https://doi.org/10.1051/epjconf/201817802015 | |
Published online | 16 May 2018 |
https://doi.org/10.1051/epjconf/201817802015
Shell model description of heavy nuclei and abnormal collective motions
KTH Royal Institute of Technology, SE-10691 Stockholm
* e-mail: chongq@kth.se
Published online: 16 May 2018
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.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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