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Spectroscopy of Low-lying States in Neutron-deficient Astatine and Francium Nuclei
KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
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2015 (English)In: NUCLEAR STRUCTURE AND DYNAMICS '15, American Institute of Physics (AIP), 2015, UNSP 030014Conference paper (Refereed)Text
Abstract [en]

Low-lying states in neutron-deficient astatine and francium nuclei have been studied by means of in-beam and delayed spectroscopy. The 13/2(+) state has been observed in francium nuclei with a similar down-sloping trend as in neighbouring astatine and bismuth isotopes, as a function of decreasing neutron number. A systematic trend can also now be seen for the 1/2(+) state both in astatine and francium nuclei, where the level energy decreases steeply as a function of neutron number when moving further away from the neutron shell closure. This trend is very similar between astatine nuclei and their francium isotones. Moreover, shape coexistence has been observed between the 13/2(+) state and the spherical 9/2(-) ground state in Fr-203 and Fr-205.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2015. UNSP 030014
, AIP Conference Proceedings, ISSN 0094-243X ; 1681
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-184940DOI: 10.1063/1.4932258ISI: 000371322600023ScopusID: 2-s2.0-84959852386ISBN: 978-0-7354-1328-3OAI: diva2:918332
3rd International Cconference on Nuclear Structure and Dynamics, JUN 14-19, 2015, Portoroz, SLOVENIA

QC 20160411

Available from: 2016-04-11 Created: 2016-04-07 Last updated: 2016-04-11Bibliographically approved

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