Spectrum of resonance states in $^6$He. Experimental and theoretical analysis

TL;DR

This paper investigates the resonance states of helium-6 through combined experimental reactions and a three-cluster microscopic theoretical model, revealing new resonances and analyzing their properties.

Contribution

It introduces a combined experimental and theoretical approach to identify and analyze new resonance states in helium-6 using hyperspherical harmonics.

Findings

Discovery of new resonance states in helium-6

Determination of resonance energies and widths

Comparison with existing models and experiments

Abstract

We explore the structure of resonance states in $^{6}$He by experimental and theoretical methods. We present the results of experimental investigations of the three-body continuous spectrum of $^{6}$He. For this aim, we use the reaction $^{3}$H$( \alpha,p\alpha)nn$, which is induced by the interaction of alpha-particles with a triton at the beam energy $E_{\alpha} =$~67.2 MeV. The theoretical analysis of the resonance structure in $^{6}$He is carried out within the framework of a three-cluster microscopic model. The model exploits the hyperspherical harmonics to describe the intercluster dynamics. The set of new resonance states is discovered by the experimental and theoretical methods. The energy, width, and dominant decay channels of resonances are determined.The obtained results are compared in detail with the results of different theoretical models and experiments as well.