Four a correlations in nuclear fragmentation:a game of resonances

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: NUCLEAR PHYSICS
• 页码范围: 406-413
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1137/abce52

摘要

Heavy ion collisions near the Fermi energy produce a'freezout'region where fragments appear and later decay,emitting mainly neutrons,protons,alpha particles,and gamma rays.These decay products carry information about the decaying nuclei.Fragmentation events may result in high yields of boson particles,especially alpha particles,and may carry important information about the nuclear Bose Einstein condensate(BEC).We study'in me-dium'four a correlations and link them to the'fission'of 16O in two 8Be in the ground state or 12C*(Hoyle state)+a.Using novel techniques for the correlation functions,we confirm the resonance of O at 15.2 MeV excitation en-ergy,and the possibility of a lower resonance,close to 14.72 MeV.The latter resonance is the result of all a particles having 92 keV relative kinetic energies.