Study of ground and excited state decays in N ≈ Z Ag nuclei

¹ University of Cologne, Germany
² GSI, Darmstadt, Germany
³ University of York, UK
⁴ RIKEN, Japan
⁵ KTH, Stockholm, Sweden
⁶ Technische Universität München, Germany
⁷ Uppsala University, Sweden
⁸ University of Tokyo, Japan
⁹ Technische Universität Darmstadt, Germany
¹⁰ Tokyo University of Science, Japan
¹¹ Chung-Ang University, Republic of Korea
¹² GANIL, France
¹³ Yale University, USA
¹⁴ Osaka University, Japan
¹⁵ Tohoku University, Japan
¹⁶ IEM, CSIC, Madrid, Spain
¹⁷ Universidad Autónoma de Madrid, Spain
¹⁸ Beihang University, China

^a e-mail: kmoschner@ikp.uni-koeln.de

Published online: 28 May 2015

Abstract

A decay spectroscopy experiment was performed within the EURICA campaign at RIKEN in 2012. It aimed at the isomer and particle spectroscopy of excited states and ground states in the mass region below the doubly magic ¹⁰⁰Sn. The N = Z nuclei ⁹⁸In, ⁹⁶Cd and ⁹⁴Ag were of particular interest for the present study. Preliminary results on the neutron deficient nuclei ⁹³Ag and ⁹⁴Ag are presented. In ⁹⁴Ag a more precise value for the half-life of the ground state’s superallowed Fermi transition was deduced. In addition the energy spectra of the mentioned decay could be reproduced through precise Geant4 simulations of the used active stopper SIMBA. This will enable us to extract Q_β values from the measured data. The decay of ⁹³Ag is discussed based on the observed implantation-decay correlation events.