²³⁰Pa was produced through the ²³²Th(p,3n)²³⁰Pa reaction in the irradiated ThO₂ powder targets with 35 MeV proton beam. Pa was radiochemically separated from ThO₂ and other reaction products, and then thin sources of ${}^{230}\text{Pa}{\stackrel{{\beta }^{-}}{\to }}^{\text{230}}\text{U}$ were prepared. The polyethylene-terephthalate (lavsan) films were selected as solid track detector searching for the cluster activity of ²³⁰U. The gamma activity of ²³⁰Pa in the sources was measured using a HPGe detector. The lavsan films were etched in NaOH solution and the etched films were scanned under an optical microscope. The exotic nuclear decay of ²³⁰U by emission of ²²Ne was observed. A branching ratio relative to α decay was deduced, B =λ_Ne/λα = (1.3±0.8)×10^-14 for ²²Ne emission from ²³⁰U.