ON ASYMPTOTICS OF THREE-BODY BOUND STATE RADIAL WAVE FUNCTIONS OF HALO NUCLEI NEAR THE HYPERANGLE phi similar to 0 AND phi similar to pi/2 IN THE CONFIGURATION SPACE AND THREE-BODY ASYMPTOTIC NORMALIZATION FACTORS FOR He-6 NUCLEUS IN THE (n+n+alpha)-CHANNEL

摘要

Asymptotic expressions for the bound state radial partial wave functions of three-body (nnc) halo nuclei with two loosely bound valence neutrons (n) are obtained in explicit form, when the relative distance between two neutrons (r) tends to infinity and the relative distance between the center of mass of core (c) and two neutrons (rho) is too small or vice versa. These asymptotic expressions contain a factor that can strongly influence the asymptotic values of the three-body radial wave function in the vicinity of the hyperangle of phi similar to 0 except 0 (r -> infinity and rho is too small except 0) or phi similar to pi/2 except pi/2 (rho -> infinity and r is too small except 0) in the configuration space. The derived asymptotic forms are applied to the analysis of the asymptotic behavior of the three-body(nn alpha) wave function for He-6 nucleus obtained by other authors on the basis of multicluster stochastic variational method using the two forms of the alpha N-potential. The ranges of r (or rho) from the asymptotical regions are determined for which the agreement between the calculated wave function and the asymptotics formulae is reached. Information about the values of the three-body asymptotic normalization factors is extracted..