Eur. Phys. J. A (2006) 30: 551-559
https://doi.org/10.1140/epja/i2006-10148-y

Nuclear Structure and Reactions

Studies of ^{213g, m}Ra and ^{214g, m}Ra 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

Abstract

The decay of ^{213, 214}Ra 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, 214}Ra including isomeric transitions. The results are discussed and compared with previously published data.