Search for possible alpha-condensate states in ²⁰Ne

2022/06/19 by A. S. Demyanova, Demyanova, A. S., A. N. Danilov +7
Physics and Astronomy · #Nuclear physics research studies #Atomic and Molecular Physics #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.2206.09475

Abstract

The root mean square radii of ²⁰Ne in the short-lived excited states were experimentally deduced for the first time from the analyses of α+²⁰Ne diffraction scattering. Differential cross sections of the elastic and inelastic α+²⁰Ne scattering in the incident energy range from a few MeV/nucleon up to 100 MeV/nucleon were analyzed by the modified diffraction model. No significant radius enhancement for the members of K^π = 0₁⁺ and K^π = 2^- bands in comparison with the ground state was observed. At the same time 20 % radius enhancement was obtained for the K^π = 0₁^- band members. Moreover, for the 0₂⁺ state located above α-emission threshold increased radius was observed. This result can speak in favor of possible α-condensate structure of the 0₂⁺ state and can be considered as a possible analog of the famous 7.65-MeV 0₂⁺ Hoyle state of ¹²C.

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