M1 and E2 transition rates from core-excited states in semi-magic Ru-94
EUROPEAN PHYSICAL JOURNAL A, vol.54, no.9, 2018 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 54 Issue: 9
- Publication Date: 2018
- Doi Number: 10.1140/epja/i2018-12581-7
- Journal Name: EUROPEAN PHYSICAL JOURNAL A
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Istanbul University Affiliated: Yes
Abstract
Lifetimes of high-spin states have been measured in the semi-magic (N = 50) nucleus Ru-94. Excited states in Ru-94 were populated in the Ni-58(Ca-40, 4p)Ru-94* fusion-evaporation reaction at the Grand Accelerateur National d'Ions Lourds (GANIL) accelerator complex. DSAM lifetime analysis was performed on the Doppler broadened line shapes in energy spectra obtained from gamma-rays emitted while the residual nuclei were slowing down in a thick 6 mg/cm(2) metallic Ni-58 target. In total eight excited-state lifetimes in the angular momentum range I = (13-20)h have been measured, five of which were determined for the first time. The corresponding B(M1) and B(E2) reduced transition strengths are discussed within the framework of large-scale shell model calculations to study the contribution of different particle-hole configurations, in particular for analyzing contributions from core-excited configurations.