High-precision mass measurements of 203-207Rn and 213Ra with SHIPTRAP

C. Droese; D. Ackermann; L. -L. Andersson; K. Blaum; M. Block; M. Dworschak; M. Eibach; S. Eliseev; U. Forsberg; E. Haettner; F. Herfurth; F. P. Heßberger; S. Hofmann; J. Ketelaer; G. Marx; E. Minaya Ramirez; D. Nesterenko; Yu. N. Novikov; W. R. Plaß; D. Rodríguez; D. Rudolph; C. Scheidenberger; L. Schweikhard; S. Stolze; P. G. Thirolf; C. Weber

doi:10.1140/epja/i2013-13013-0

2022 Impact factor 2.7

Hadrons and Nuclei

Eur. Phys. J. A (2013) 49: 13
https://doi.org/10.1140/epja/i2013-13013-0

Regular Article - Experimental Physics

High-precision mass measurements of ^203-207Rn and ²¹³Ra with SHIPTRAP

C. Droese¹^*, D. Ackermann², L. -L. Andersson³^,4, K. Blaum⁵^,6, M. Block², M. Dworschak², M. Eibach⁵^,7, S. Eliseev⁵, U. Forsberg⁸, E. Haettner²^,9, F. Herfurth², F. P. Heßberger²^,4, S. Hofmann², J. Ketelaer⁵, G. Marx¹, E. Minaya Ramirez⁴, D. Nesterenko¹⁰, Yu. N. Novikov¹⁰, W. R. Plaß²^,9, D. Rodríguez¹¹, D. Rudolph⁸, C. Scheidenberger²^,9, L. Schweikhard¹, S. Stolze¹², P. G. Thirolf¹³ and C. Weber¹³

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

Abstract

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.