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Application of the Multi‐Doorway Continuum Shell Model to the Magnetic Dipole Strength Distribution in 58 Ni
Author(s) -
Spangenberger H.,
Beck F.,
Richter A.
Publication year - 1990
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.19905020802
Subject(s) - physics , exciton , dipole , atomic physics , excitation , scattering , electron scattering , nuclear structure , quantum mechanics
The usual continuum shell model is extended so as to include a statistical treatment of multi‐doorway processes. The total configuration space of the nuclear reaction problem is subdivided into the primary doorway states which are coupled by the initial excitation to the nuclear ground state and the secondary doorway states which represent the complicated nature of multi‐step reactions. The latter are evaluated within the exciton model which gives the coupling widths between the various finestructure subspaces. This coupling is determined by a statistical factor related to the exciton model and a dynamical factor given by the interaction matrix elements of the interacting excitons. The whole structure defines the multi‐doorway continuum shell model. In this work it is applied to the highly fragmented magnetic dipole strength in 58 Ni observed in high resolution electron scattering.