@Article{Ralet_etal2019,
author="Ralet, D. et al
and Gadea, A.
and Perez, R. M.",
title="Evidence of octupole-phonons at high spin in Pb-207<bold> </bold>",
journal="Physics Letters B",
year="2019",
publisher="Elsevier",
volume="797",
pages="134797--6pp",
optkeywords="AGATA spectrometer; gamma-Ray tracking; VAMOS plus plus spectrometer; Plunger device; Nuclear deformation; Octupole phonon",
abstract="A lifetime measurement of the 19/2(-) state in Pb-207 has been performed using the Recoil Distance Doppler-Shift (RDDS) method. The nuclei of interest were produced in multi-nucleon transfer reactions induced by a Pb-208 beam impinging on a Mo-100 enriched target. The beam-like nuclei were detected<bold> </bold>and identified in terms of their atomic mass number in the VAMOS++ spectrometer while the prompt gamma rays were detected by the AGATA tracking array. The measured large reduced transition probability B(E3, 19/2(-) -> 13/2(+)) = 40(8) W.u. is the first indication of the octupole phonon at high spin in Pb-207. An analysis in terms of a particle-octupole-vibration coupling model indicates that the measured B(E3) value in Pb-207 is compatible with the contributions from single-phonon and single particle E3 as well as E3 strength arising from the double-octupole-phonon 6(+) state, all adding coherently. A crucial aspect of the coupling model, namely the strong mixing between single-hole and the phonon-hole states, is confirmed in a realistic shell-model calculation.",
optnote="WOS:000488071200015",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4163), last updated on Tue, 22 Oct 2019 16:26:56 +0000",
issn="0370-2693",
doi="10.1016/j.physletb.2019.134797",
opturl="https://doi.org/10.1016/j.physletb.2019.134797",
language="English"
}