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Nuclear deformations in the region of the A=160 r-process abundance peak
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
2012 (English)In: Physica Scripta, ISSN 0031-8949, E-ISSN 1402-4896, Vol. T150, 014038- p.Article in journal (Refereed) Published
Abstract [en]

In the abundance spectrum of r-process nuclei the most prominent features are the peaks that form when the r-process flow passes through the closed neutron shells. However, there are also other features in the abundance spectrum that cannot be explained by shell effects; for example, the peak in the region of the rare-earth nuclei around mass A = 160. It has been argued that this peak is related to the deformation maximum of the neutron-rich isotopes. In recent years, both experimental and theoretical work has been carried out to study the deformation of neutron-rich rare-earth nuclei and to search for the point of maximum deformation. This work has focused on the nuclei around Dy-170 with the aim of understanding the evolution of collectivity in the neutron shell with 82 < N < 126. These investigations will be discussed in terms of the Harris parameters of the variable moment of inertia model. Finally, we will discuss the possibility of reaching further into the neutron-rich rare-earth region in the future at the new experimental facilities using radioactive beams.

Place, publisher, year, edition, pages
2012. Vol. T150, 014038- p.
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Natural Sciences
Identifiers
URN: urn:nbn:se:uu:diva-185207DOI: 10.1088/0031-8949/2012/T150/014038ISI: 000309605500039OAI: oai:DiVA.org:uu-185207DiVA: diva2:571349
Available from: 2012-11-22 Created: 2012-11-21 Last updated: 2017-12-07Bibliographically approved

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Söderström, Pär-Anders

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