https://doi.org/10.1140/epja/i2013-13013-0
Regular Article - Experimental Physics
High-precision mass measurements of 203-207Rn and 213Ra with SHIPTRAP
1
Ernst-Moritz-Arndt-Universität, Felix-Hausdorff-Straße 6, 17489, Greifswald, Germany
2
GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, 64291, Darmstadt, Germany
3
University of Liverpool, L69 7ZE, Liverpool, UK
4
Helmholtz-Institut Mainz, Johannes Gutenberg-Universität, Johann-Joachim-Becher-Weg 36, 55099, Mainz, Germany
5
Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117, Heidelberg, Germany
6
Ruprecht-Karls-Universität Heidelberg, Albert-Ueberle-Str. 3-5, 69120, Heidelberg, Germany
7
Johannes Gutenberg-Universität Mainz, Saarstr. 21, 55122, Mainz, Germany
8
Lund University, Sölvegatan 37, 22362, Lund, Sweden
9
Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 14-16, 35392, Gießen, Germany
10
PNPI, NRC Kurchatov Institute, 188300 St. Petersburg, Gatchina, Russia
11
Universidad de Granada, Campus de Fuentenueva, 18071, Granada, Spain
12
University of Jyväskylä, Seminaarinkatu 15, 40014, Jyväskylä, Finland
13
Ludwig Maximilians-Universität München, Am Coulombwall 1, 85748, Garching, Germany
* e-mail: c.droese@gsi.de
Received:
20
June
2012
Revised:
12
November
2012
Accepted:
4
January
2013
Published online:
25
January
2013
The masses of the nuclides 203-207Rn and 213Ra were measured directly for the first time with the Penning-trap mass spectrometer SHIPTRAP at GSI Darmstadt. The results confirm the previously determined mass values. The mass uncertainties for 205Rn and 213Ra were significantly reduced. The results are relevant for the investigation of the nuclear shell structure between N = 82 and N = 126 . As an indicator of structural changes the two-neutron separation energies 
have been studied.
© SIF, Springer-Verlag Berlin Heidelberg, 2013
