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Title: Coexistence of {alpha}+{alpha}+n+n and {alpha}+t+t cluster structures in {sup 10}Be

The coexistence of the {alpha}+{alpha}+n+n and {alpha}+t+t cluster structures in the excited states of {sup 10}Be has been discussed. In the previous analysis, all the low-lying states of {sup 10}Be were found to be well described by the motion of the two valence neutrons around two {alpha} clusters. However, the {alpha}+t+t cluster structure was found to coexist with the {alpha}+{alpha}+n+n structure around E{sub x}=15 MeV, close to the corresponding threshold. We have introduced a microscopic model to solve the coupling effect between these two configurations. The K=0 and K=1 states are generated from the {alpha}+t+t configurations due to the spin coupling of two triton clusters. The present case of {sup 10}Be is one of the few examples in which completely different configurations of triton-type ({alpha}+t+t three-center) and {alpha}-type ({alpha}+{alpha}+n+n two-center) clusters coexist in a single nucleus in the same energy region.
Authors:
 [1] ;  [2] ;  [3] ; ; ;  [4]
  1. Department of Physics, University of Tokyo, Hongo, 113-0033 Tokyo (Japan)
  2. RIKEN Nishina Center, Wako, 351-0198 Saitama (Japan)
  3. Department of Physics, University of Zagreb, HR-10000 Zagreb (Croatia)
  4. Tokai Radioactive Ion Accelerator Complex, High Energy Accelerator Research Organization (KEK), Tokai, 319-1105 Ibaraki (Japan)
Publication Date:
OSTI Identifier:
21191997
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 77; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevC.77.067301; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BERYLLIUM 10; CLUSTER MODEL; CONFIGURATION; COUPLING; EXCITED STATES; MEV RANGE; NEUTRONS; S STATES; SPIN; TRITONS; VALENCE