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Charge radii of odd-A Po191-211 isotopes
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2013 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 719, no 4-5, 362-366 p.Article in journal (Refereed) Published
Abstract [en]

Isotope shifts have been measured for the odd-A polonium isotopes Po191-211 and changes in the nuclear mean square charge radii delta < r(2 >) have been deduced. The measurements were performed at CERN-ISOLDE using the in-source resonance-ionization spectroscopy technique. The combined analysis of these data and our recent results for even-A polonium isotopes indicates an onset of deformation already at Po-197,Po-198, when going away from stability. This is significantly earlier than was suggested by previous theoretical and experimental studies of the polonium isotopes. Moreover and in contrast to the mercury isotopes, where a strong odd-even staggering of the charge radii of the ground states was observed by approaching the neutron mid-shell at N = 104, no such effect is present in polonium down to Po-191. Consequently the charge radii of both isomeric and ground states of the odd-A polonium isotopes follow the same trend as the even-A isotopes.

Place, publisher, year, edition, pages
2013. Vol. 719, no 4-5, 362-366 p.
Keyword [en]
Isotope shift, Nuclear charge radius, Shape coexistence
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-120553DOI: 10.1016/j.physletb.2013.01.043ISI: 000315316900015ScopusID: 2-s2.0-84873571388OAI: diva2:616091
EU, European Research Council, ERC-2011-AdG-291561-HELIOS

QC 20130415

Available from: 2013-04-15 Created: 2013-04-11 Last updated: 2013-04-15Bibliographically approved

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Sjödin, Marica
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