Search for isovector valence-shell excitations in 140Nd and 142Sm via Coulomb excitation reactions of radioactive ion beams

Ralph Kern, Robert Stegmann, Norbert Pietralla, Georgi Rainovski, Liam Paul Gaffney, Andrey Blazhev, Amar Boukhari, Joakim Cederkäll, James Cubiss, Martin Djongolov, Christoph Fransen, Kalin Gladnishki, Efstathios Giannopoulos, Herbert Hess, Jan Jolie, Vasil Karayonchev, Levent Kaya, James Keatings, Diana Kocheva, Thorsten KröllOliver Möller, George O'Neill, Janne Pakarinen, Peter Reiter, Dawid Rosiak, Marcus Scheck, Jacob Snall, Pär-Anders Söderström, Pietro Spagnoletti, Milena Stoyanova, Stefan Thiel, Andreas Vogt, Nigel Warr, Andree Welker, Volker Werner, Johannes Wiederhold, Hilde De Witte, Radostina Zidarova

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Abstract

Projectile Coulomb excitation experiments were performed at HIE-ISOLDE at CERN with the radioactive ion beams of 140Nd and 142Sm. Ions with an energy of 4:62 MeV/A were impinging on a 1.45 mg/cm2 thick 208Pb target. The γ-rays depopulating the Coulomb-excited states were recorded by the HPGe-array MINIBALL and scattered particles were detected by a double-sided silicon strip detector. Experimental intensities were used for the determination of electromagnetic transition matrix elements. A preliminary result of the B(M1; 2+3 → 2+1) of 140Nd and an upper limit for the case of 142Sm are revealing the main fragments of the proton-neutron mixed-symmetry 2+1;ms states.
Original languageEnglish
Article number03003
Number of pages5
JournalEPJ Web of Conferences
Volume194
Early online date14 Nov 2018
DOIs
Publication statusE-pub ahead of print - 14 Nov 2018

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