Nuclear Data Sheets for A = 66

Core-coupled protons,f7/2intruder states, and competingg9/2proton and neutron structures inChiara1, Stefanescu2, Walters3 et al. 2012Phys. Rev. C

“…The bands in 59,67,69 Cu also exhibit some degree of regularity in their gamma-ray sequences, which is suggestive of an interpretation as a collective rotational structure involving a high-Ω orbital that would drive the deformation and generate a sequence of dipole transitions. The moment of inertia (J = I/E γ ) in these…”

“…[38] are indicated in square brackets in the figure. The line is extrapolated down to 59 Cu and up to 71 Cu. These states would correspond to those with the largest proton 2p1h contribution to their configuration, and involve the excitation of an f 7/2 proton across the Z = 28 shell gap.…”

“…9. This may suggest that, for 67 Cu, the addition of the f 7/2 proton does not significantly alter the underlying structure of the sequence-i.e., it more closely resembles weak coupling to the core than its 59 Cu counterpart.…”

“…This picture can also be extended to other observed levels in the odd-A Cu isotopes. A prime example of this is 59 Cu, which is a fairly simple system with one proton and two neutrons outside a 56 Ni core. Figure 11 of Ref.…”

“…5) are excluded from the figure because of the noted ambiguity of their parity assignments. 65 Cu compared to the ground-state bands of the even-even Ni [58] and Zn [59] isotones and shell-model calculations using the JUN45 and jj44b…”