skip to main content

Title: Excitation energies of particle-hole states in {sup 208}Pb and the surface delta interaction

The schematic shell model without residual interaction (SSM) assumes the same excitation energy for all spins in each particle-hole configuration multiplet. In {sup 208}Pb, more than forty states are known to contain almost the full strength of a single particle-hole configuration. The experimental excitation energy for a state with a certain spin differs from the energy predicted by the SSM by -0.2 to +0.6 MeV. The multiplet splitting is calculated with the surface delta interaction; it corresponds to the diagonal matrix element of the residual interaction in the SSM. For states containing more than 90% strength of a certain configuration and for the centroid of several completely observed configurations, the calculated multiplet splitting often approximates the experimental excitation energy within 30 keV. The strong mixing within some pairs of states containing the full strengths of two configurations is explained.
Authors:
 [1] ;  [2] ;  [3]
  1. Max-Planck-Institut fuer Kernphysik (Germany)
  2. JINR, Bogoliubov Laboratory of Theoretical Physics (Russian Federation)
  3. Institut fuer Kernphysik der Universitaet zu Koeln (Germany)
Publication Date:
OSTI Identifier:
22149303
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Atomic Nuclei; Journal Volume: 76; Journal Issue: 7; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; APPROXIMATIONS; CONFIGURATION; EXCITATION; KEV RANGE; LEAD 208; MIXING; RESIDUAL INTERACTIONS; SHELL MODELS; SPIN; SURFACE DELTA POTENTIAL