Coexistence of α+α+n+n and α+t+t cluster structures in Be10

Details Coexistence of α+α+n+n and α+t+t cluster structures in Be10 Coexistence of α+α+n+n and α+t+t cluster structures in Be10

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008phrvc..77f7301i&link_type=abstract

Physical Review C, vol. 77, Issue 6, id. 067301

Physics

1

Cluster Models, 6<=A<=19

Scientific paper

The coexistence of the α+α+n+n and α+t+t cluster structures in the excited states of Be10 has been discussed. In the previous analysis, all the low-lying states of Be10 were found to be well described by the motion of the two valence neutrons around two α clusters. However, the α+t+t cluster structure was found to coexist with the α+α+n+n structure around Ex=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 α+t+t configurations due to the spin coupling of two triton clusters. The present case of Be10 is one of the few examples in which completely different configurations of triton-type (α+t+t three-center) and α-type (α+α+n+n two-center) clusters coexist in a single nucleus in the same energy region.

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