Coulomb Excitation of Proton-rich N = 80 Isotones at HIE-ISOLDE
Kern, Ralph; Zidarova, Radostina; Pietralla, Norbert; Rainovski, Georgi; Gaffney, Liam P.; Blazhev, Andrey; Boukhari, Amar; Cederkäll, Joakim; Cubiss, James G.; Djongolov, Martin; Fransen, Christoph et al. (2020). Coulomb Excitation of Proton-rich N = 80 Isotones at HIE-ISOLDE. In XXIII International School on Nuclear Physics, Neutron Physics and Applications, Journal of Physics : Conference Series, 1555. Institute of Physics, 012027. DOI: 10.1088/1742-6596/1555/1/012027
Published inJournal of Physics : Conference Series
© Authors, 2020
A projectile Coulomb-excitation experiment was performed at the radioactive ion beam facility HIE-ISOLDE at CERN. The radioactive 140Nd and 142Sm ions were post accelerated to the energy of 4.62 MeV/A and impinged on a 1.45 mg/cm2-thin 208Pb target. The γ rays depopulating the Coulomb-excited states were recorded by the HPGe-array MINIBALL. The scattered charged particles were detected by a double-sided silicon strip detector in forward direction. Experimental γ-ray intensities were used for the determination of electromagnetic transition matrix elements. Preliminary results for the reduced transition strength of the B(M1 23+ to 21+)=0.35(19) μN2 of 140Nd and a first estimation for 142Sm have been deduced using the Coulomb-excitation calculation software GOSIA. The 23+ states of 140Nd and 142Sm show indications of being the main fragment of the proton-neutron mixed-symmetry 21, ms+ state.