Evidence for New Structures in $^{17}$O

In an effort to confirm that certain strongly excited states in $^{17}$O are selectively populated by four and five-particle reactions and are the result of direct, single-step transfer, spectra and angular distributions have been obtained for the reactions $^{16}$O(d,p)$^{17}$O, $^{13}$C($^{6}$Li,d)$^{17}$O, $^{12}$C($^{7}$Li,d)$^{17}$O, and $^{12}$C($^{6}$Li,p)$^{17}$O$^{2}$. Strong states seen in the five particle transfer reactions at 11.82, 12.00, 12.22 and 12.42 MeV are very weakly populated in $^{16}$O(d,p) showing that they have very little single particle strength. Excitation functions were also measured for $^{12}$C($^{7}$Li,d) in the energy range 32-35 MeV and for $^{12}$C($^{6}$Li,p) in the energy range 26-32 MeV. The same strong states were observed at each energy. These data were collected using the FSU Tandem/LINAC accelerator. The angular distributions for the strong states are well described by DWBA calculations yielding further support for five-particle single-step transfer. $^{2}$M.J. Smithson, D.L. Watson, and H.T. Fortune, J.Phys.G, Nucl. Phys. 12 (1986) 985.