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Article
Title	Coulomb Excitation of Proton-rich $N = 80$ Isotones at HIE-ISOLDE
Author(s)	Kern, Ralph (Darmstadt, Tech. U.) ; Zidarova, Radostina (Darmstadt, Tech. U.) ; Pietralla, Norbert (Darmstadt, Tech. U.) ; Rainovski, Georgi (Sofiya U.) ; Gaffney, Liam P (CERN) ; Blazhev, Andrey (Cologne U.) ; Boukhari, Amar (CERN) ; Cederkäll, Joakim (CERN ; Lund U. (main)) ; Cubiss, James G (York U., England) ; Djongolov, Martin (Sofiya U.) ; Fransen, Christoph (Cologne U.) ; Gladnishki, Kalin (Sofiya U.) ; Giannopoulos, Efstathios (CERN ; Jyvaskyla U.) ; Hess, Herbert (Cologne U.) ; Jolie, Jan (Cologne U.) ; Karayonchev, Vasil (Cologne U.) ; Kaya, Levent (Cologne U.) ; Keatings, James M (West Scotland U.) ; Kocheva, Diana (Sofiya U.) ; Kroll, Thorsten (Darmstadt, Tech. U.) ; Moller, Oliver (Darmstadt, Tech. U.) ; O'Neill, George G (Western Cape U. ; iThemba LABS) ; Pakarinen, Janne (Jyvaskyla U.) ; Reiter, Peter (Cologne U.) ; Rosiak, Dawid (Cologne U.) ; Scheck, Marcus (West Scotland U.) ; Snall, Jacob (Lund U. (main)) ; Soderstrom, Par-Anders (ELI-NP, Bucharest) ; Spagnoletti, Pietro (West Scotland U.) ; Stegmann, Robert (Darmstadt, Tech. U.) ; Stoyanova, Milena (Sofiya U.) ; Thiel, Stefan (Cologne U.) ; Vogt, Andreas (Cologne U.) ; Warr, Nigel (Cologne U.) ; Welker, Andree (CERN) ; Werner, Volker (Darmstadt, Tech. U.) ; Wiederhold, Johannes (Darmstadt, Tech. U.) ; De Witte, Hilde (Leuven U.)
Publication	2020
Number of pages	8
In:	J. Phys. : Conf. Ser. 1555 (2020) 012027
In:	23rd International School on Nuclear Physics, Neutron Physics and Applications, Varna, Bulgaria, 22 - 28 Sep 2019, pp.012027
DOI	10.1088/1742-6596/1555/1/012027
Subject category	Nuclear Physics - Experiment
Accelerator/Facility, Experiment	CERN HIE ISOLDE
Abstract	A projectile Coulomb-excitation experiment was performed at the radioactive ion beam facility HIE-ISOLDE at CERN. The radioactive $^{140}$Nd and $^{142}$Sm ions were post accelerated to the energy of 4.62 MeV/A and impinged on a 1.45 mg/cm$^2$-thin $^{208}$Pb target. The $\gamma$ 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 $\textrm{B}(M1;2^+_3 \to 2^+_1)=035(19) \mu^2_N$ of $^{140}$Nd and a first estimation for $^{142}$Sm have been deduced using the Coulomb-excitation calculation software GOSIA. The  states of $^{140}$Nd and $^{142}$Sm show indications of being the main fragment of the proton-neutron mixed-symmetry $2^+_{1,\textrm{ms}}$ state.
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