The linear-chain structure in which three alpha particles are arranged in a straight line was initially proposed by H.Morinaga[1]as the structure of the Hoyle state of carbon-12[2].This unique idea attracted much atte...The linear-chain structure in which three alpha particles are arranged in a straight line was initially proposed by H.Morinaga[1]as the structure of the Hoyle state of carbon-12[2].This unique idea attracted much attention,but it was rejected because it could not explain the lifetime of the Hoyle state.Half a century later,the concept of the linear chain structure was revived in the physics of unstable nuclei,and experimental and theoretical research have demonstrated that this structure exists in carbon-14 and 16.The authors have conducted internationally recognized experimental research on the linear-chain structure of carbon-14 and carbon-16.展开更多
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 abou...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 medium’fourαcorrelations and link them to the‘fission’of 16O in two 8Be in the ground state or 12C*(Hoyle state)+α.Using novel techniques for the correlation functions,we confirm the resonance of 16O at 15.2 MeV excitation energy,and the possibility of a lower resonance,close to 14.72 MeV.The latter resonance is the result of allαparticles having 92 keV relative kinetic energies.展开更多
文摘The linear-chain structure in which three alpha particles are arranged in a straight line was initially proposed by H.Morinaga[1]as the structure of the Hoyle state of carbon-12[2].This unique idea attracted much attention,but it was rejected because it could not explain the lifetime of the Hoyle state.Half a century later,the concept of the linear chain structure was revived in the physics of unstable nuclei,and experimental and theoretical research have demonstrated that this structure exists in carbon-14 and 16.The authors have conducted internationally recognized experimental research on the linear-chain structure of carbon-14 and carbon-16.
基金Supported by the National Natural Science Foundation of China(11765014,11865010,11905120,I1605097,U2032146,11421505)the Robert A.Welch Founda-tion(A-1266)+6 种基金the US Department of Energy(DE-FG02-93ER40773)Natural Science Foundation of Inner Mongolia(2018MS01009,20191001)the Chinese Academy of Sciences(CAS)President's International Fellowship Initiative(2015VW A070)the Strategic Priority Research Program of the Chinese Academy of Sci-ences(XDB16,XDPB09)the Program for Young Talents of Science and Technology in Univrities of Inmer Mongolia Autonomous Region(NJYT-18-B21)the Doctoral Seientifie Research Foundation of Inner Mongolia University for Nationalities(BS365.BS400)The Fundamental Research Funds for the Central University(GK201903022)。
文摘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 medium’fourαcorrelations and link them to the‘fission’of 16O in two 8Be in the ground state or 12C*(Hoyle state)+α.Using novel techniques for the correlation functions,we confirm the resonance of 16O at 15.2 MeV excitation energy,and the possibility of a lower resonance,close to 14.72 MeV.The latter resonance is the result of allαparticles having 92 keV relative kinetic energies.
