Dipole bands in <SUP>196</SUP>Hg

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New nanosecond isomers identified with the AFRODITE array

The Recoil Shadow Anisotropy Method for measuring nanosecond lifetimes is being implemented on the AFRODITE array and four new isomers were found in 198,200Bi, 164Ta and 162Lu

Characterization of quasiparticle states at and beyond stability in ytterbium isotopes: Spectroscopy of

Excited states in 175Yb, 176Yb and 177Yb were populated via the bombardment of a 176Yb target with a 750 MeV 136Xe beam. Gamma-ray decays from these states were measured with the AFRODITE multi-detector spectrometer. The rotational band previously assigned to the ground state of 177Yb has been reassigned to the first-excited state of 175Yb. A new rotational band based on the ground state of 177Yb is presented, and the band based on the K π = 4- two-quasiparticle state in 176Yb has been identified. Also a candidate for the rotational band based on the K π = 8-, T 1/2 = 11.4(3) s two-quasiparticle state in 176Yb has been found. Comparisons of gK values derived from in-band branching ratios are consistent with the ν9/2+[624] assignment to the ground state of 177Yb, the ν2{9/2+[624] ⊗ 1/2-[510]} assignment to the K π = 4- state and with the ν2{9/2+[624] ⊗ 7/2-[514]} assignment to the K π = 8- metastable excited state in 176Yb

Rotational structures in 196Hg

CITATION: Lawrie, J. J., et al. 2019. Rotational structures in 196Hg. Physical Review C, 100(6):064321, doi:10.1103/PhysRevC.100.064321.The original publication is available at https://journals.aps.org/prcHigh spin states in ¹⁹⁶Hg were populated in the ¹⁹⁸Pt(α,6n) reaction at 65 MeV and γ−γ coincidence measurements were performed using the AFRODITE array at iThemba LABS. The level scheme was extended and new rotational bands were observed. A new dipole band was found. The previously reported dipole band was linked to other known states. Excitation energies, spins, and parities of all bands were determined. The bands were assigned nucleon configurations based on cranked shell model calculations.https://journals.aps.org/prc/abstract/10.1103/PhysRevC.100.064321Publisher's versio

Rotational bands and chirality in

The high-spin states in 194Tl were studied using the 181Ta(18O, 5n) reaction and the AFRODITE $\gamma$ -ray spectrometer at iThemba LABS. The level scheme of 194Tl was considerably extended with several new bands. Three negative-parity 4-quasiparticle bands were observed and associated with $\pi h_{9/2}\otimes\nu i_{13/2}^{-3}$ configurations. Two of these form a candidate chiral pair with excellent near-degeneracy. In addition two new positive-parity bands were found

Close near-degeneracy in a pair of four-quasiparticle bands in Tl-194

A pair of rotational bands associated with the pi h(9/2) circle times nu i(13/2)(-1) configuration at lower spins and with the pi h(9/2) circle times nu i(13/2)(-3) configuration at higher spins is found in Tl-194. The two 4-quasiparticle bands show exceptionally close near-degeneracy in the excitation energies. Furthermore close similarity is also found in their alignments and B(M1)/B(E2) reduced transition probability ratios. Such close near-degeneracy probably indicates chiral geometry in the angular momentum space. (c) 2013 Elsevier B.V. All rights reserved