Study of Proton and Deuteron Pickup Reactions ^2H(^10Be,^3He)^9Li and ^2H(^10Be,^4He)^8Li with 44 A MeV ^10Be 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 ⁹Lig.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+⁹Lig.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.