Fast rotation of nuclei with extreme isospin in the vicinity of neutron and proton drip lines

Abstract

The analysis of the present understanding of collective rotation in very neutron-rich nuclei is presented. It is shown that collective rotation can lead to the increase of stability of rotational states with increasing spin. The detailed investigation of rotational excitations in very proton-rich nuclei confirms this conclusion and indicate that experimental studies of such features are more feasible in the nuclei near proton drip line. They also show that rotational bands which are proton quasi-bound at zero or low spins can be transformed into proton bound ones at high spin by collective rotation of nuclear systems. This is due to strong Coriolis interaction which acts on high-$j$ or strongly mixed M orbitals and drives the highest in energy occupied single-particle states into negative energy domain. These physical mechanisms lead to a substantial extension of the nuclear landscape beyond the spin zero proton drip line. In addition, a new phenomenon of the formation of giant proton halos in rotating nuclei emerges: it is triggered by the occupation of strongly mixed M intruder orbitals.

23 pages, 6 figures

References in corpus (15)

• Global performance of covariant energy density functionals: ground state observables of even-even nuclei and the estimate of theoretical uncertainties
• Progress on tilted axis cranking covariant density functional theory for nuclear magnetic and antimagnetic rotation
• Interacting fermions in rotation: chiral symmetry restoration, moment of inertia and thermodynamics
• Rod-shaped Nuclei at Extreme Spin and Isospin
• Boundary effects and gapped dispersion in rotating fermionic matter
• The Neutron-Rich Edge of the Nuclear Landscape. Experiment and Theory
• Nilsson diagrams for light neutron-rich nuclei with weakly-bound neutrons
• Two-proton emission and related phenomena
• Production of proton-rich nuclei in the vicinity of 100Sn via multinucleon transfer reactions
• Rotational excitations in near neutron-drip line nuclei: the birth and death of particle-bound rotational bands and the extension of nuclear landscape beyond spin zero neutron drip line
• Single-particle and collective motion in unbound deformed ${}^{39}\text{Mg}$
• Hyperdeformation in the cranked relativistic mean field theory: the Z=40-58 part of nuclear chart
• Hyperheavy spherical and toroidal nuclei: the role of shell structure
• Shape and shell-structure of lighter (N<90) neutron-rich nuclei based on phenomenological Woods-Saxon potential
• Super- and hyper-deformation in ${}^{60}$Zn, ${}^{62}$Zn, and ${}^{64}$Ge at high spins

Cited by in corpus (1)

• Clusterization aspects in the states of non-rotating and fast rotating nuclei