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Title: Nuclear collective motion: Strength and limitations of group theoretical methods

Abstract

We discuss both the strength of the Interacting Boson Model (IBM) as a unifying structure, emphasizing the robust elements as well as the limitations in an early U(6) group structure of interacting s and d bosons. We briefly address the rich structure of the IBM-2 approach, when treating proton and neutron degrees of freedom explicitly, which gives rise to non-symmetric spatial excitation modes of which a number have been detected experimentally. Finally, the very clear observation of particle-hole excitations near to closed-shell regions, leads to an extension of the IBM to include both particle and hole bosons. The basic concepts are presented as well as the compelling experimental evidence pointing out the existence of larger group-structures than the U(6) group structure.

Authors:
 [1];  [2];  [1];  [1]
  1. Subatomic and Radiation Physics, INW, Proeftuinstraat 86, B-9000 Gent (Belgium)
  2. (Belgium)
Publication Date:
OSTI Identifier:
21208246
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 481; Journal Issue: 1; Conference: Nuclear structure 98 conference, Gatlinburg, TN (United States), 10-15 Aug 1998; Other Information: DOI: 10.1063/1.59528; (c) 1999 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; APPROXIMATIONS; DEGREES OF FREEDOM; ENERGY LEVELS; EXCITATION; INTERACTING BOSON MODEL; NEUTRONS; NUCLEAR STRUCTURE; PARTICLE-HOLE MODEL; PROTONS; SHELL MODELS; SU-4 GROUPS; U-6 GROUPS

Citation Formats

Coster, Caroline de, Fund for Scientific Research-Flanders, Decroix, Bruno, and Heyde, Kris. Nuclear collective motion: Strength and limitations of group theoretical methods. United States: N. p., 1999. Web. doi:10.1063/1.59528.
Coster, Caroline de, Fund for Scientific Research-Flanders, Decroix, Bruno, & Heyde, Kris. Nuclear collective motion: Strength and limitations of group theoretical methods. United States. doi:10.1063/1.59528.
Coster, Caroline de, Fund for Scientific Research-Flanders, Decroix, Bruno, and Heyde, Kris. Thu . "Nuclear collective motion: Strength and limitations of group theoretical methods". United States. doi:10.1063/1.59528.
@article{osti_21208246,
title = {Nuclear collective motion: Strength and limitations of group theoretical methods},
author = {Coster, Caroline de and Fund for Scientific Research-Flanders and Decroix, Bruno and Heyde, Kris},
abstractNote = {We discuss both the strength of the Interacting Boson Model (IBM) as a unifying structure, emphasizing the robust elements as well as the limitations in an early U(6) group structure of interacting s and d bosons. We briefly address the rich structure of the IBM-2 approach, when treating proton and neutron degrees of freedom explicitly, which gives rise to non-symmetric spatial excitation modes of which a number have been detected experimentally. Finally, the very clear observation of particle-hole excitations near to closed-shell regions, leads to an extension of the IBM to include both particle and hole bosons. The basic concepts are presented as well as the compelling experimental evidence pointing out the existence of larger group-structures than the U(6) group structure.},
doi = {10.1063/1.59528},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 481,
place = {United States},
year = {1999},
month = {9}
}