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Adachi, S.; Fujikawa, Y.; Kawabata, T.; Akimune, H.; Doi, T.; Furuno, T.; Harada, T.; Inaba, K.; Ishida, S.; Itoh, M.; Iwamoto, C.; Kobayashi, N.; Maeda, Y.; Matsuda, Y.; Murata, M.; Okamoto, S.; Sakaue, A.; Sekiya, R.; Tamii, A.; Tsumura, M.
Physics letters. B, 08/2021, Volume: 819Journal Article
We conducted the coincidence measurement of α particles inelastically scattered from 20Ne at 0° and decay charged particles in order to search for the alpha-particle condensed state. 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 20Ne are strongly coupled to a candidate for the 4α condensed state in 16O. This result presents the first strong evidence that these states are the candidates for the 5α condensed state.
