The results of the mass-spectrometric experimental search in a fluorine sample of hypothetical²⁰ Ne atoms with a deformed structure of the electronic shells can be interpreted as a constraint on the lifetime of²⁰ Ne atoms relative to the violation of the Pauli principle, Γ> 2 Χ ΙΟ³⁰y, and as a constraint on the concentration of symmetrized (non-Pauli) electrons in the universe, S(e~~') <2X 10~²²