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Study of ^7li+^10b Elastic Scattering and the Lithium-Induced Reaction of One-Nucleon Transfers from ^10B(^7li,^6li)^11b

Sergey Stukalov, Yuri Sobolev, Yuri Penionzhkevich,Nassurlla Burtebayev, Sergey Goncharov, Yuri Gurov,Andrey Danilov,Alla Demyanova, Sergey Dmitriev,Maulen Nassurlla,Viktar Starastsin, Alexey Shakhov, Semyon Raidun, Nguyen Hoai Chau

arXiv · (2024)

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Abstract
The angular distributions of elastic scattering of ^7Li, as well as the lithium-induced reaction of one-nucleon transfers ^10B(^7Li,^6Li)^11B were measured at E_lab = 58 MeV. Experiment was done using U-400 accelerator beam of the FLNR JINR, Dubna. Angular distribution for reaction ^10B(^7Li,^6Li)^11B with excitation of the 3.56 MeV state (^6Li*) is presented for the first time. The DWBA analysis of the differential cross section of the ^10B(^7Li,^6Li)^11B ground state (g.s.) transition and excited (J^π = 0^+, T = 1, E = 3.56 MeV) state of ^6Li transition was performed. The optical model potentials were obtained by fitting of measured elastic scattering data and evaluating parameters for the output reaction channels. Phenomenological approach based on solving an approximate equation for the reaction form factor was used to determine its radial dependence and empirical values of asymptotic normalization coefficient (ANC). Obtained values of ANCs for the ^6Li_g.s. and ^6Li*(3.56 MeV) states are in agreement with the literature ones. Comparison of the radial dependences of form factors shows that the wave function of the ^6Li nucleus in excited (J^π = 0^+, T = 1, E = 3.56 MeV) state has increased spatial dimension compared to the ground state. This result is an argument in favor of a halo existence in ^6Li*(3.56 MeV) state, while the question of a halo in ^6Li_g.s. still leaves open.
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