Candidates for the 5$α$ condensed state in ${}^{20}$Ne

Abstract

The alpha-particle condensed state in finite nuclei will shed light on low-density nuclear matter. We carried out the coincidence measurement of α particles inelastically scattered from 20 Ne at 0 • and decay charged particles. We compared the measured excitation-energy spectrum and decay branching ratio with the statistical-decay-model calculations, and found that the newly observed states at Ex = 23.6, 21.8, and 21.2 MeV in 20 Ne are strongly coupled to a candidate for the 4α condensed state in 16 O. The present result suggests that these states are the candidates for the 5α condensed state in 20 Ne.

Semi-microscopic construction of multi-$α$ cluster spaces

“…One of the rare applications of cluster models to 20 Ne is published in [27], were an experimental candidates of a 5-α particles was reported and the interpretation relies on [25]. These multi-α-particle states were related to high lying 0 + states.…”