https://doi.org/10.1140/epja/i2006-10148-y
Nuclear Structure and Reactions
Studies of 213g, mRa and 214g, mRa by α and γ decay
1
Gesellschaft für Schwerionenforschung (GSI), D-64220, Darmstadt, Germany
2
Institut für Physik, Johannes Gutenberg-Universität Mainz, D-55099, Mainz, Germany
3
Department of Physics, Comenius University Bratislava, SK-84215, Bratislava, Slovakia
4
Institut für Kernphysik, Johann Wolfgang Goethe-Universität, D-60486, Frankfurt am Main, Germany
5
Japan Atomic Energy Agency, 319-1184, Tokai,Ibaraki, Japan
* e-mail: Pasi.Kuusiniemi@oulu.fi
Received:
27
April
2006
Accepted:
20
November
2006
Published online:
12
December
2006
The decay of 213, 214Ra was studied by α-γ and γ-γ coincidence measurements. The nuclei were produced in the reactions 170Er(48Ca, xn)218-x Ra and 170Er(50Ti, 3n)217Th and subsequent α decay of 217Th to 213Ra. Evaporation residues recoiling out of the target were separated in-flight by the velocity filter SHIP and implanted into a position-sensitive 16-strip PIPS detector in order to study their subsequent decays. Associated γ-rays were detected by a four-fold Ge-Clover detector. In the present work we extracted new and improved data for 213, 214Ra including isomeric transitions. The results are discussed and compared with previously published data.
PACS: 23.60.+e α decay – / 23.20.Lv γ transitions and level energies – / 27.80.+w 190 ⩽ A ⩽ 219 –
© Società Italiana di Fisica and Springer-Verlag, 2007