Rotating nuclei at extreme conditions: Cranked Relativistic Mean Field Description

The cranked relativistic mean field (CRMF) theory is applied for the description of superdeformed (SD) rotational bands observed in $^{153}$Ho. The question of the structure of the so-called SD band in $^{154}$Er is also addressed and a brief overview of applications of CRMF theory to the description of rotating nuclei at extreme conditions is presented.Comment: 4 pages, 1 PostScript figure, LaTex, uses 'espcrc1.sty', to be published in Proceedings of International Nuclear Physics Conference, Paris, 1998 which will appear in Nuclear Physic

Relative Properties of Smooth Terminating Bands

The relative properties of smooth terminating bands observed in the A~110 mass region are studied within the effective alignment approach. Theoretical values of $i_{eff}$ are calculated using the configuration-dependent shell-correction model with the cranked Nilsson potential. Reasonable agreement with experiment shows that previous interpretations of these bands are consistent with the present study. Contrary to the case of superdeformed bands, the effective alignments of these bands deviate significantly from the pure single-particle alignments of the corresponding orbitals. This indicates that in the case of smooth terminating bands, the effects associated with changes in equilibrium deformations contribute significantly to the effective alignment.Comment: 15 pages, 8 PostScript figures, RevTex, uses 'epsf', submitted to Nucl. Phys.

Fission of actinides and superheavy nuclei: covariant density functional theory perspective

The current status of the application of covariant density functional theory to the description of fission barriers in actinides and superheavy nuclei is reviewed. The achievements and open problems are discussed.Comment: 8 pages, the proceedings of Fifth International conference on "Fission and properties of neutron-rich nuclei", November 4-10, 2012, Sanibel Island, USA in pres

Cluster structures, ellipsoidal shapes and nuclear molecules in light A=12-50 nuclei

The transition from cluster structures to extremely elongated ellipsoidal shapes and nuclear molecules in light $A=12-50$ $(N \sim Z)$ nuclei has been studied within the framework of covariant density functional theory. Nodal structure of the occupied single-particle states plays a critical role in microscopic understanding of this transition. This is illustrated by the analysis of dominant types of single-particle density distributions and their evolution (from the bottom of nucleonic potential) with deformation and particle number. The microscopic mechanism of the transition from clustered structures to ellipsoidal shapes and nuclear molecules and between them is discussed.Comment: EPJ Web of Conferences 194, 06001 (2018), 6 page

Covariant energy density functionals: the assessment of global performance across the nuclear landscape

The assessment of the global performance of the state-of-the-art covariant energy density functionals and related theoretical uncertainties in the description of ground state observables has recently been performed. Based on these results, the correlations between global description of binding energies and nuclear matter properties of covariant energy density functionals have been studied in this contribution.Comment: 4 pages, 2 figures, Contribution to the Proceedings of the International Nuclear Physics Conference 'Nuclear Structure and Dynamics III', Portoroz, Slovenia, 201

Soliton propagation and polarisation mode-locking in birefringent optical fibres

Soliton propagation in polarization-preserving fibres is analysed. Based on the coupled nonlinear Schrodinger equations we derive an analytical approximation for such type of soliton propagation. Exploitation of soliton polarization properties for passive mode-locking in fibre lasers is also considered

Description of rotating N=ZN=Z nuclei in terms of isovector pairing

A systematic investigation of the rotating $N=Z$ even-even nuclei in the mass $A=58-80$ region has been performed within the frameworks of the Cranked Relativistic Mean field, Cranked Relativistic Hartree Bogoliubov theories and cranked Nilsson-Strutinsky approach. Most of the experimental data is well accounted for in the calculations. The present study suggests that there is strong isovector $np$-pair field at low spin, the strength of which is defined by the isospin symmetry. At high spin, the isovector pair field is destroyed and the data are well described by the calculations assuming zero pairing. No clear evidence for the existence of the isoscalar $t=0$ $np$-pairing has been obtained in the present investigation.Comment: 20 pages + 19 figures, submitted to Phys. Rev.