Structure studies of 11Be and 12Be: Observation of molecular rotational bands |
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| Authors: | H. G. Bohlen W. von Oertzen A. Blažević B. Gebauer S. M. Grimes R. Kalpakchieva T. N. Massey S. Thummerer |
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| Affiliation: | (1) Department of Physics and Astronomy, Ohio University, Athens, USA;(2) Flerov Laboratory of Nuclear Reactions, JINR, Dubna, Russia;(3) Bulgarian Academy of Science, Sofia, Bulgaria;(4) Hahn-Meitner-Institut, Berlin, Germany |
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| Abstract: | Excited states of 11Be have been studied with several transfer reactions. Nine states between 3.96 and 25.0 MeV excitation energy show the characteristic energy dependence of a rotational band. The deduced large moment of inertia is consistent with a 2α structure with large deformation. In 12Be four high-lying states observed at 7.3, 10.7, 14.6, and 21.7 MeV in the reaction 9Be(15N,12N)12Be, also form a rotational band with almost the same moment of inertia; tentative spin assignments of 2+–8+ are used. |
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