Darmstadt 2008 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 22: Kernphysik / Spektroskopie

HK 22.1: Vortrag

Dienstag, 11. März 2008, 08:30–08:45, 2G

Plunger lifetime measurements in ¹²⁸Xe using Coulomb excitation in inverse kinematics — •Wolfram Rother¹, Alfred Dewald¹, Gabriela Ilie¹, Thomas Pissulla¹, Barbara Melon¹, Jan Jolie¹, Gheorghe Pascovici¹, Karl-Oskar Zell¹, Rauno Julin², Peter Jones², Paul Greenless², Panu Rahkila², Cath Scholey², Sotirios Harissopulos³, Anastasios Lagoyannis³, T. Konstantinopoulos³, Tuomas Grahn^2,4, and Dimiter Balabanski⁵ — ¹IKP, Universität zu Köln, Köln, Germany — ²JYFL, University of Jyväskylä, Jyväskylä, Finland — ³INP, N.C.S.R. "Demokritos", Athens, Greece — ⁴Oliver Lodge Lab., University of Liverpool, Liverpool, UK — ⁵INRNE, Sofia, Bulgaria

We report on an experiment using Coulomb excitation in inverse kinematics in combination with the plunger technique for measuring lifetimes of excited states of the projectile. Aside from the investigation of E(5) features in ¹²⁸Xe, the aim was to explore the special features of such experiments which are also suited to be used with radioactive beams. The measurement was performed at the JYFL with the Köln coincidence plunger device and the JuroGam spectrometer using a ¹²⁸Xe beam impinging on a ^natFe target at a beam energy of 525 MeV. Recoils were detected by means of 32 solar cells placed at extrem forward angles. Recoil-gated γ-singles and γγ-coincidences were measured at different target-degrader distances. Details of the experiment and first results will be presented. Partly supported through EURONS (EC contract No.RII3-CT-2004-506065) and by the Academy of Finland under the Finnish CoE Programme 2006-2011 (contract 213503).