Study of Proton and Deuteron Pickup Reactions ^2H(^10Be,^3He)^9Li and ^2H(^10Be,^4He)^8Li with 44 A MeV ^10 Be Radioactive Beam at ACCULINNA-2 Fragment Separator

The proton and deuteron pickup reactions ^2H(^10Be,^3He)^9Li and ^2H(^10Be,^4He)^8Li were studied with the ^10Be radioactive beam produced by the new fragment separator ACCULINNA-2 at FLNR, JINR. These measurements were initially motivated as the test reactions intended for the elucidation of results obtained in the study of the extremely neutron-rich ^7 H and ^6 H systems created in the ^2H(^8He,^3He)^7H and ^2H(^8He,^4He)^6H reactions with the use of the same setup. In the ^2H(^10Be,^3He)^9Li reaction the ^9 Li ground-state ( 3/2^- ) and its first excited state (2.69 MeV, 1/2^- ) were identified in the low-energy region of its excitation spectrum. The differential cross sections for the ^9Li_g.s. population were extracted at the forward center-of-mass angles ( 3^∘-13^∘ ) and compared with the FRESCO calculations. Spectroscopic factor of ∼1.7 , derived by a model suggesting the ^10Be=p+^9Li_g.s. clustering was found in accord with the experimental data. The energy spectrum of ^8 Li populated in the ^2H(^10Be,^4He)^8Li reaction shows the strong peak which corresponds to the excitation of the second excited state of ^8 Li (2.25 MeV, 3^+ ). The fact that the ground and the first excited states of ^8 Li were not observed in this reaction is consistent with the shell-model structure of the nuclei involved.