Microscopic analysis of quadrupole-octupole shape evolution

Modeling the Shape: Some Contemporary Approaches to Quadrupole-Octupole Deformations in Atomic Nuclei

We will briefly review a few collective and microscopic model approaches currently developing with the aim to explore nuclear dynamic properties ensuing from the appearance of quadrupole-octupole deformations. We will depict the present status of the study of alternating-parity spectra in even-even nuclei and parity quasi-doublet sequences in odd-mass nuclei. Different model limits of octupole ...

Description of the Nuclear Octupole and Quadrupole Deformation

A parametrization of octupole plus quadrupole deformation, in terms of intrinsic variables defined in the rest frame of the overall tensor of inertia, is presented and discussed. The model is valid for situations close to the axial symmetry, but non axial deformation parameters are not frozen to zero. The properties of the octupole excitations in the deformed Thorium isotopes Th, Th are interpr...

Quadrupole and octupole radiation from 16O near 39 MeV excitation.

Tuning fifth-order aberrations in a quadrupole-octupole corrector.

The resolution of conventional electron microscopes is usually limited by spherical aberration. Microscopes equipped with aberration correctors are then primarily limited by higher order, chromatic, and misalignment aberrations. In particular the Nion third-order aberration correctors installed on machines with a low energy spread and possessing sophisticated alignment software were limited by ...

Optimized Quadrupole-Octupole C3/C5 Aberration Corrector for STEM

The ideal location for an aberration corrector in an electron-optical column is at the place where the aberration is introduced. In practice, this of course typically cannot be achieved. The resultant separation between where an aberration is introduced and where it is removed produces combination aberrations for all aberrations of higher than first order. In the case of third-order aberration ...