Decay pattern of the Pygmy Dipole Resonance in 140Ce

J. Isaak; B. Löher; D. Savran; T. Aumann; J. Beller; N. Cooper; V. Derya; M. Duchêne; J. Endres; E. Fiori; J.H. Kelley; M. Knörzer; N. Pietralla; V.Yu. Ponomarev; C. Romig; M. Scheck; H. Scheit; J. Silva; A.P. Tonchev; W. Tornow; H.R. Weller; V. Werner; A. Zilges; M. Zweidinger

doi:10.1051/epjconf/20159301048

All issues

Volume 93 (2015)

EPJ Web of Conferences, 93 (2015) 01048

Abstract

Open Access

Issue		EPJ Web of Conferences Volume 93, 2015 CGS15 – Capture Gamma-Ray Spectroscopy and Related Topics


Article Number		01048
Number of page(s)		2
Section		Nuclear Structure
DOI		https://doi.org/10.1051/epjconf/20159301048
Published online		28 May 2015

EPJ Web of Conferences 93, 01048 (2015)
https://doi.org/10.1051/epjconf/20159301048

Decay pattern of the Pygmy Dipole Resonance in ¹⁴⁰Ce

J. Isaak¹^,2^a, B. Löher¹^,2, D. Savran¹^,2, T. Aumann³^,4, J. Beller³, N. Cooper⁵, V. Derya⁶, M. Duchêne³, J. Endres⁶, E. Fiori¹^,2, J.H. Kelley⁷^,8, M. Knörzer³, N. Pietralla³, V.Yu. Ponomarev³, C. Romig³, M. Scheck⁹^,10, H. Scheit³, J. Silva¹^,2, A.P. Tonchev¹¹, W. Tornow⁷, H.R. Weller⁷, V. Werner³^,5, A. Zilges⁶ and M. Zweidinger³

¹ ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
² Frankfurt Institute for Advanced Studies FIAS, Frankfurt am Main, Germany
³ Institut für Kernphysik, Technische Universität Darmstadt, Germany
⁴ GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
⁵ WNSL, Yale University, New Haven, Connecticut, USA
⁶ Institut für Kernphysik, Universität zu Köln, Germany
⁷ Department of Physics, Duke University, Triangle Universities Nuclear Laboratory, Durham, North Carolina, USA
⁸ Department of Physics, North Carolina State University, Raleigh, North Carolina USA
⁹ School of Engineering, University of the West of Scotland, Paisley, UK
¹⁰ SUPA, Scottish Universities Physics Alliance, Glasgow, UK
¹¹ Physics Division, Lawrence Livermore National Laboratory, Livermore, California, USA

^a e-mail: j.isaak@gsi.de

Published online: 28 May 2015

Abstract

The decay behavior of low-lying dipole states in ¹⁴⁰Ce was investigated exploiting the γ³-setup at the HIγS facility using quasi-monochromatic photon beams. Branching ratios of individual excited states as well as average branching ratios to low-lying states have been extracted using γ – γ coincidence measurements. The comparison of the average branching ratios to QPM calculations shows a remarkable agreement between experiment and theory in the energy range from 5.0 to 8.5 MeV.

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