%0 Journal Article
%T Study of the soft dipole modes in Ce-140 via inelastic scattering of O-17
%A Krzysiek, M. et al
%A Gadea, A.
%A Huyuk, T.
%A Barrientos, D.
%J Physica Scripta
%D 2014
%V 89
%N 5
%I Iop Publishing Ltd
%@ 0031-8949
%G English
%F Krzysiek_etal2014
%O WOS:000335785300016
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1790), last updated on Thu, 12 Jun 2014 10:15:18 +0000
%X The main aim of this study was a deeper understanding of the nuclear structure properties of the soft dipole modes in Ce-140, excited via inelastic scattering of weakly bound O-17 projectiles. An important aim was to investigate the 'splitting' of the PDR into two parts: a low-energy isoscalar component dominated by neutron-skin oscillations and a higher-energy component lying on the tail of the giant dipole resonance of a rather isovector character. This was already observed for this nucleus, investigated in (alpha, alpha') and (gamma,gamma') experiments. The experiment was performed at Laboratori Nazionali di Legnaro, Italy. Inelastic scattering of O-17 ion beam at 20 MeV A(-1) was used to excite the resonance modes in the Ce-140 target. Gamma-rays were registered by five triple clusters of AGATA-Demonstrator and nine large volume scintillators (LaBr3). The scattered O-17 ions were identified by two Delta E – E Si telescopes of the TRACE array mounted inside the scattering chamber. The telescopes consisted of two segmented Si-pad detectors, each of 60 pixels. Very preliminary data have shown a strong domination of the E1 transitions in the 'pygmy' region with a character more similar to the one obtained in alpha scattering experiment.
%K pygmy dipole resonances
%K inelastic scattering
%K AGATA detector
%K gamma spectroscopy
%R 10.1088/0031-8949/89/5/054016
%U https://doi.org/10.1088/0031-8949/89/5/054016
%P 054016-6pp