Onset of triaxial deformation in Zn66 and properties of its first excited 0+ state studied by means of Coulomb excitation

Abstract

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Low-Energy Coulomb Excitation for the Shell Model

“…The first hints of the intruder character of the 0 + 2 states in the Zn isotopes came from E0 measurements in the stable even-even [64][65][66][67][68] Zn isotopes [27], a feature further supported by the results of multi-step Coulomb-excitation experiments on 66,68 Zn [14,28]. However, only for 68 Zn has the key 2 + 3 E2 0 + 2 matrix element been determined, which, when combined with other matrix elements involving the 0 + 2 state, leads to a Q 2 invariant significantly different from that of the ground state [28].…”

“…While theoretical approaches can, in principle, provide a complete set of electromagnetic matrix elements, this is not always true for experiments. Systematic studies employing the Shell Model addressed this convergence issue [13][14][15]. The contributions of individual products of matrix elements to the experimentally determined invariants have also been analysed in some cases [14,[16][17][18].…”

“…Systematic studies employing the Shell Model addressed this convergence issue [13][14][15]. The contributions of individual products of matrix elements to the experimentally determined invariants have also been analysed in some cases [14,[16][17][18].…”

Low-Energy Coulomb Excitation for the Shell Model

“…In particular, the Q 3 cos 3δ invariant is typically amounts to well over 90% of the total. Similarly, the largest contributions to 157 Q 3 cos 3δ for the ground state come from the 0 vergence issue [14][15][16]. The contributions of individual products of matrix elements to the 164 experimentally determined invariants have also been analysed in some cases [15,[17][18][19].…”

“…Similarly, the largest contributions to 157 Q 3 cos 3δ for the ground state come from the 0 vergence issue [14][15][16]. The contributions of individual products of matrix elements to the 164 experimentally determined invariants have also been analysed in some cases [15,[17][18][19]. demonstrated in the very first experiment using the AGATA γ-ray tracking array [20].…”