Intruder dominance in the 02+ state of Mg 32 studied with a novel technique for in-flight decays

Autor: Elder, R, Iwasaki, H, Ash, J, Bazin, D, Bender, PC, Braunroth, T, Brown, BA, Campbell, CM, Crawford, HL, Elman, B, Gade, A, Grinder, M, Kobayashi, N, Longfellow, B, Macchiavelli, AO, Mijatović, T, Pereira, J, Revel, A, Rhodes, D, Tostevin, JA, Weisshaar, D
Rok vydání: 2019
Předmět:
Zdroj: Physical Review C, vol 100, iss 4
Popis: The development of advanced γ-ray tracking arrays allows for a sensitive new technique to investigate elusive states of exotic nuclei with fast rare-isotope beams. By taking advantage of the excellent energy and position resolution of the Gamma-Ray Energy Tracking In-beam Nuclear Array, we developed a novel technique to identify in-flight isomeric decays of the 02+ state in Mg32 populated in a two-proton removal reaction. We confirm the 02+→21+γ-ray transition of Mg32 and constrain the 02+ decay lifetime, suggesting a large collectivity. The small partial cross section populating the 02+ state in this reaction provides experimental evidence for the reduced occupancy of the normal configuration of the 02+ state, indicating the intruder dominance of this state.
Databáze: OpenAIRE