Related Experiment Video
Updated: Jul 13, 2026

Enhancing Density Maps by Removing the Majority of Particles in Single Particle Cryogenic Electron Microscopy Final Stacks
Published on: May 10, 2024
Exact removal of the center-of-mass spurious states from level densities
Mihai Horoi1, Vladimir Zelevinsky
1Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA.
Abstract:
We give recursive formulae for the exact removal of the contribution of the center-of-mass spurious states from the fixed-spin and parity nuclear level density found in shell-model calculations, provided the total level density for restricted configurations is known. The method is valid for a large class of problems using a harmonic oscillator basis. Using our earlier methods based on statistical spectroscopy that utilize the centroids and widths for a restricted class of fixed-spin configurations, such as Nvariant Planck's over 2piomega excitations, one can calculate very accurately level densities free of spurious states. The approach is applicable to other fermion and boson systems trapped by an oscillator potential.
Related Concept Videos
Significance of Center of Mass
Center of Mass
The knowledge of the center of mass can also help us to describe and predict the motion of objects. For example, when a ball is thrown into...
Conservation of Mass in Fixed, Nondeforming Control Volume
In the case of a sewer pipe, which can be modeled...
Conservation of Mass in Moving, Nondeforming Control Volume
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
Center of Mass: Introduction
Moments and Centers of Mass

