Münster 2017 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 27: Poster

HK 27.32: Poster

Tuesday, March 28, 2017, 16:45–18:45, F Foyer

Lifetimes of 2₁⁺,4₁⁺ states of ¹⁴⁸Ce from EXILL&FATIMA — •Pavlos Koseoglou¹, V. Werner^1,2, N. Pietralla¹, S. Ilieva¹, M. Thürauf¹, C. Bernards², A. Blanc³, A.M. Bruce⁴, R.B. Cakirli⁵, N. Cooper², G. de France⁶, M. Jentschel³, J. Jolie⁷, U. Koester³, T. Kröll¹, P. Mutti³, Z. Patel⁸, V. Paziy⁹, Zs. Podolyak⁸, P. H. Regan^8,10, J.-M. Régis⁷, O.J. Roberts⁴, N. Saed-Samii⁷, G.S. Simpson¹¹, T. Soldner³, C. A. Ur¹², W. Urban³, D. Wilmsen⁷, and E. Wilson⁸ — ¹IKP TU-Darmstadt, Germany — ²Yale University, USA — ³ILL Grenoble, France — ⁴University of Brighton, England — ⁵MPIK Heidelberg, Germany — ⁶GANIL Caen, France — ⁷IKP University of Cologne, Germany — ⁸University of Surrey, England — ⁹Universidad Complutense, Spain — ¹⁰National Physical Laboratory, UK — ¹¹LPSC Grenoble, France — ¹²INFN Legnaro, Italy

An update on the analysis of the EXILL&FATIMA data on ¹⁴⁸Ce will be given. ¹⁴⁸Ce lies on the down boundaries of a shape phase transition region of the even-even N=90 isotones with Z=60-66. The B_4/2 value will point out the behaviour of the phase transition evolution. A first estimation will be presented and it will be connected to a new CPS called X(4).²³⁵U and ²⁴¹Pu fission fragments were measured by a mixed spectrometer consisting of Ge and LaBr₃(Ce)-scintillator detectors at the ILL. Lifetimes in the ps region are extracted with the slope and the General Centroid Difference method. This kind of analysis can serve as preparation for the FATIMA experiments at FAIR. Supported by HGS-HIRe, US DOE under Grant No. DE-FG02-91ER-40609 and BMBF grant No. 05P15RDFN1.