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Title	Restoring the valence-shell stabilization in $^{140}$Nd
Author(s)	Kern, R (Darmstadt, Tech. U.) ; Zidarova, R (Darmstadt, Tech. U. ; Sofiya U.) ; Pietralla, N (Darmstadt, GSI) ; Rainovski, G (Sofiya U.) ; Stegmann, R (Darmstadt, GSI) ; Blazhev, A (Cologne U.) ; Boukhari, A (CERN) ; Cederkäll, J (CERN ; Lund U. (main)) ; Cubiss, J G (York U., England) ; Djongolov, M (Sofiya U.) ; Fransen, C (Cologne U.) ; Gaffney, L P (CERN ; Liverpool U.) ; Gladnishki, K (Sofiya U.) ; Giannopoulos, E (CERN ; Helsinki U. ; Jyvaskyla U.) ; Hess, H (Cologne U.) ; Jolie, J (Cologne U.) ; Karayonchev, V (Cologne U.) ; Kaya, L (Cologne U.) ; Keatings, J M (West Scotland U. ; SUPA, UK) ; Kocheva, D (Sofiya U.) ; Kröll, Th (Darmstadt, Tech. U.) ; Möller, O (Darmstadt, Tech. U.) ; O'Neill, G G (Western Cape U. ; iThemba LABS) ; Pakarinen, J (Helsinki Inst. of Phys. ; Jyvaskyla U.) ; Reiter, P (Cologne U.) ; Rosiak, D (Cologne U.) ; Scheck, M (West Scotland U. ; SUPA, UK) ; Snall, J (Lund U. (main)) ; Söderström, P A (Darmstadt, GSI ; Bucharest, IFIN-HH) ; Spagnoletti, P (West Scotland U. ; SUPA, UK) ; Stoyanova, M (Sofiya U.) ; Thiel, S (Cologne U.) ; Vogt, A (Cologne U.) ; Warr, N (Cologne U.) ; Welker, A (CERN) ; Werner, V (Darmstadt, GSI) ; Wiederhold, J (Darmstadt, GSI) ; De Witte, H (Leuven U.)
Publication	2020
Number of pages	6
In:	Phys. Rev. C 102 (2020) 041304
DOI	10.1103/PhysRevC.102.041304
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 to obtain $E2$ and $M1$ transition matrix elements of $^{140}$Nd using the multistep Coulomb-excitation code GOSIA. The absolute $M1$ strengths, $\textrm{B}(M1;2^+_2→2^+_1)=0.033(8)μ^2_N,\textrm{B}(M1;2^+_3→2^+_1)=0.26^{+0.11}_{−0.10}μ^2_N$, and $\textrm{B}(M1;2^+_4→2^+_1)<0.04μ^2_{\textrm{N}}$, identify the $2^+_3$ state as the main fragment of the one-quadrupole-phonon proton-neutron mixed-symmetry state of $^{140}$Nd. The degree of F-spin mixing in $^{140}$Nd was quantified with the determination of the mixing matrix element $V_{\textrm{F−mix}}<7^{+13}_{−7}$keV.
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