Darmstadt 2008 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 48: Kernphysik / Spektroskopie I

HK 48.6: Talk

Friday, March 14, 2008, 15:30–15:45, 2E

Plunger lifetime measurements after Coulomb excitation at intermediate beam energies — •Matthias Hackstein¹, Alfred Dewald¹, Pavel Petkov^1,3, Christoph Fransen¹, Gabriela Ilie¹, Jan Jolie¹, Barbara Melon¹, Thomas Pissulla¹, Wolfram Rother¹, Karl-Oskar Zell¹, Aaron Chester², Przemyslaw Adrich², Daniel Bazin², Matt Bowen², Alexandra Gade², Thomas Glasmacher², Dave Miller², Victoria Moeller², Krzysztof Starosta², Andreas Stolz², Constantin Vaman², Philip Voss², Dirk Weissharr², and Oliver Möller⁴ — ¹University of Cologne, Germany — ²Michigan State University/NSCL — ³INRNE, Bulgaria — ⁴TU Darmstadt, Germany

Two recoil-distance-Doppler-shift (RDDS) experiments were performed at the NSCL/MSU using Coulomb excitations of the projectile nuclei ¹¹⁰Pd, ¹¹⁴Pd at beam energies of 54 MeV/u in order to investigate the evolution of deformation of neutron rich paladium isotopes. The experimental set-up consisted of a dedicated plunger device, developed at the University of Cologne, the SEGA Ge-array and the S800 spectrometer. Lifetimes of the 2₁⁺-states in ¹¹⁰Pd and ¹¹⁴Pd were derived from the analysis of the γ-line-shapes as well as from the measured decay-curves. Special features of the data analysis, e.g. features originating from the very high recoil velocities, will be discussed. Supported by DFG: contract number DE 1516/1-1