Excitation spectrum of 10B nucleus when capturing real and virtual α-particles

Abstract

In this paper within the multi-particle shell model the excitation spectra of ¹⁰B nucleus in lithium reactions of triton and a-particle clusters transfer were calculated using the summation of the corresponding spectroscopic S-factors. It is shown that the difference between excitation spectra of ¹⁰B nucleus in lithium reaction of a-cluster transfer and in the reaction of radiation capture ⁶Li(a, g)¹⁰B is due to the structural peculiarities of the states of ¹⁰В nucleus in near threshold region. In (a, g) reaction on ⁶Li nucleus the resonance structure of cross sections is observed. The observable resonances are due to small a-widths of the excited states of ¹⁰B nucleus. As the wave functions of the ground state of ^6,7Li nuclei, as well as the ground and excited states of the ¹⁰B nucleus, we used the well-known wave functions of the many-particle shell model calculated at the Scientific Research Institute of Nuclear Physics, M. Lomonosov Moscow State University.

The large escape of resonance monochromatic g-quanta with energy E_g = 5.1639 and E_g = 6.025 МэВ in the process on ⁶Li nucleus confirms the possibility of use of the reaction for diagnostics of fusion plasma by adding a definite amount of lithium isotopes into the plasma.