Molecular structures in T=1 states of B-10
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Background: Multicenter (molecular) structures can play an important role in light nuclei. The highly deformed rotational band in 10Be with a bandhead at 6.179 MeV has been observed recently and suggested to have an exotic :2n: configuration. Purpose: Search for states with :pn: two-center molecular configurations in 10B that are analogous to the states with :2n: structure in 10Be. Methods: The T=1 isobaric analog states in 10B were studied in the energy range of E x=8.7 - 12.1 MeV using the reaction 1H(9Be,)6Li*(T=1, 0+, 3.56 MeV). An R-matrix analysis was used to extract parameters for the states observed in the (p,) excitation function. Results: Five T=1 states in 10B have been identified. The known 2+ and 3 - states at 8.9 MeV have been observed and their partial widths have been measured. The spin parities and partial widths for three higher-lying states were determined. Conclusions: Our data support theoretical predictions that the 2+ state at 8.9 MeV (isobaric analog of the 7.54-MeV state in 10Be) is a highly clustered state and can be identified as a member of the :np: rotational band. The next member of this band, the 4 + state, has not been found. A very broad 0+ state at 11 MeV that corresponds to pure +6Li(0+, T=1) configuration is suggested and it might be related to similar structures found in 12C, 18O, and 20Ne. 2011 American Physical Society.
author list (cited authors)
Kuchera, A. N., Rogachev, G. V., Goldberg, V. Z., Johnson, E. D., Cherubini, S., Gulino, M., ... Tumino, A.
complete list of authors
Kuchera, AN||Rogachev, GV||Goldberg, VZ||Johnson, ED||Cherubini, S||Gulino, M||La Cognata, M||Lamia, L||Romano, S||Miller, LE||Pizzone, RG||Rapisarda, GG||Sergi, ML||Spitaleri, C||Tribble, RE||Trzaska, WH||Tumino, A