New measurement of 4He and proton decays from resonant states in 19Ne* *Supported by the National Key R & D Program of China (2018YFA0404403, 2022YFA1602302), the National Natural Science Foundation of China (11875074, 11875073, 12235020, 12027809, 11961141003, U1967201, U2167204, 11775004, 11775003), the Continuous Basic Scientific Research Project (WDJC-2019-13), the State Key Laboratory of Nuclear Physics and Technology, Peking University (NPT2020KFY10),

Abstract

A Li(O,Ne)H multi-nucleon transfer-reaction experiment was performed to populate the highly excited states in Ne. The subsequent decay particles, He or protons from the Ne resonant states, were detected in coincidence with the recoil H. The excitation-energy spectra of Ne were reconstructed using the detected proton or He and the deduced F or O data, respectively. A broad resonance at about 7.85 MeV (1/2) was observed, with partial decay widths different from the previously reported values, which may have a significant impact on the destruction of F in astrophysical processes. Several resonances up to very high excitation energies have been identified with a large α-clustering strength, which confirm the formation of the cluster structure with a one-hole configuration in light nuclei and encourage further systematic studies of the cluster structure in Ne.