Investigation of $\alpha$-resonances in $^{10}$Be using $^6$He($\alpha,\alpha$)$^6$He

Numerous theoretical and experimental studies have shown the importance of clustering in light nuclei [1]. The Be isotopes have been of particular interest recently due to their exotic two-core $\alpha+\alpha+$ valence neutrons configurations [2,3,4,5]. Experimentally, ($\alpha,\alpha$) reactions are prime tools for studying these structures. In this work, the $^{6}$He$+\alpha$ excitation function in the range of 10 to 18.5 MeV was measured. The $^6$He beam was produced with the RESOLUT radioactive beam facility at FSU. Measurements were performed using the active target detector ANASEN [6]. Parameters of the observed states were determined by an R-Matrix analysis. The properties of these resonances in $^{10}$Be will be discussed.\\[4pt] [1] M. Freer, Rep. Prog. Phys. 70, 2149 (2007).\\[0pt] [2] A. Dote, H. Horiuchi, and Y. Kanada-Enyo, Phys. Rev. C 56, 1844 (1997).\\[0pt] [3] N. Itagaki and S. Okabe, Phys. Rev. C 61, 044306 (2000).\\[0pt] [4] Y. Ogawa, K. Arai, Y. Suzuki, and K. Varga, Nucl. Phys. A 673, 122 (2000).\\[0pt] [5] M. Freer, et al., Phys. Rev. Lett. 96, 042501 (2006).\\[0pt] [6] M.Matos, et al., Proc. Intern. Symposium on Nuclei in the Cosmos XI, July 2010, Heidelberg, Germany, p.226 (2010).