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Borromean structures in medium-heavy nuclei

AuthorsHove, D.; Fedorov, D.V.; Fynbo, H.O.U.; Jensen, A.S.; Riisager, K.; Zinner, N.T.; Garrido, Eduardo
Issue Date2014
PublisherAmerican Physical Society
CitationPhysical Review C - Nuclear Physics 90: 064311-1- 064311-15 (2014)
AbstractBorromean nuclear cluster structures are expected at the corresponding drip lines. We locate the regions in the nuclear chart with the most promising constituents, it being protons and ¿ particles and investigate in details the properties of the possible Borromean two-α systems in medium-heavy nuclei. We find in all cases that the ¿ particles are located at the surface of the core nucleus as dictated by Coulomb and centrifugal barriers. The two lowest three-body bound states resemble a slightly contracted 8Be nucleus outside the core. The next two excited states have more complex structures but with strong components of linear configurations with the core in the middle. α-removal cross sections would be enhanced with specific signatures for these two different types of structures. The even-even Borromean two-α nucleus, Ba142, is specifically investigated and predicted to have 134Te-α-α structure in its ground state and low-lying spectrum. ©2014 American Physical Society
Description15 pags. ; 7 tabs. ; 11 figs. ; PACS number(s): 21.45.−v, 31.15.xj, 21.60.Gx, 27.60.+j
Identifiersdoi: 10.1103/PhysRevC.90.064311
issn: 0556-2813
Appears in Collections:(CFMAC-IEM) Artículos
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