[en] The rare phenomenon of nuclear wobbling motion has been investigated in the nucleus 187Au. A longitudinal wobbling-bands pair has been identified and clearly distinguished from the associated signature-partner band on the basis of angular distribution measurements. Theoretical calculations in the framework of the particle rotor model are found to agree well with the experimental observations. This is the first experimental evidence for longitudinal wobbling bands where the expected signature partner band has also been identified, and establishes this exotic collective mode as a general phenomenon over the nuclear chart.

[en] The interaction strength between chiral doublet bands is studied using the two-band mixing picture and the particle rotor model (PRM). The present calculations indicate that the interaction strength between chiral doublet bands is equal to zero for the ideal case of the πh_11/2 ⊗ νh_11/2^-1 configuration with γ = 30°, and the interaction strength becomes larger as γ deviates from 30°. For γ = 15° or 45°, the average interaction strength is approximately 180 keV in the chiral region. (author)

[en] The data require an appreciable attenuation of the recoil term in the particle-rotor model hamiltonian. This fact may be related to the necessity of attenuating the Coriolis interaction.

[en] The magnetic moments of nuclei with LS closed shell +/-1 particle are calculated. Core polarization and meson exchange current are treated realistically in order to single out the 6-quark contribution. Overall agreement with experimental values is quite good. It is shown that the 6-quark system contributes to the respective iso-vector and iso-scalar moments with reasonable magnitudes

No abstract available

[en] Recently, most of the works concentrated on rigid triaxiality in γ-band for medium and heavy mass even-even nuclei. The rigid triaxiality in g-band for light mass nuclei have not been studied sufficiently. In the present work we focus on rigid triaxiality in light Mo-Cd nuclei for N < 66, to test whether asymmetry parameter γ₀ is related to the variation of N and Z

[en] The E1 strength distributions in even-even Si isotopes were calculated in the 'particle-core coupling' version of the shell model taking into account the fragmentation of the hole configuration among the states of the daughter nuclei. The comparison of calculated strength distributions in different isotopes of the same element shows the peculiarities of a neutron surface influence on the E1 resonance fragmentation. (authors)

[en] The low-lying negative parity band in ²²⁶Ra is described by a phenomenological model for octupole vibrations coupled to a static deformed core. The energies of the whole band are reproduced by adjusting the intrinsic energies of the octupole vibrations. (orig.)

[en] A new particle-core basis having approximate supersymmetric (SUSY) features associated with SU(3) dynamical symmetry is introduced. The SUSY and CO-SUSY limits of IBFM/PTQM appear for the characteristic intermediate coupling strengths Γ/δ = +- (Γ/δ)/sub SUSY/. The CO-SUSY limit is a truncated analog of the Stephens rotation-aligned scheme. A paradox was found in the relation of the SUSY and truncated strong coupling (TSC) limits to the strong coupling limit of the Bohr-Mottelson model

[en] The core-particle coupling model is applied to the description of the back-bending anomaly. In contrast to the Cranking model within this model the exact conservation of angular momentum is naturally involved. Beginning with the construction of the 1 qp mode the ground (0 qp) and excited (2 qp) bands are built step by step. (author)