| Triple α-particle resonances in the decay of hot nuclear systems |
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| 作者姓名： | 张苏雅拉吐 王金成 A.Bonasera 黄美容 郑华 张国强 Z.Kohley 马余刚 S.J.Yennello |
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| 作者单位： | College of Physics and Electronics information;Cyclotron Institute;Laboratori Nazionali del Sud;School of Physics and Information Technology;Shanghai Advanced Research Institute;Shanghai Institute Applied Physics;Chemistry Department;Key Laboratory of Nuclear Physics and Ion-beam Application （MOE） |
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| 基金项目： | Supported by the National Natural Science Foundation of China(1176014,11605097,11421505,11865010);the US Department of Energy(DE-FG02-93ER40773,NNSA DE-NA0003841(CENTAUR));the Robert A.Welch Foundation(A-1266);supported by the Chinese Academy of Sciences(CAS)President’s International Fellowship Initiative(2015VWA070);Strategic Priority Research Program of the Chinese Academy of Sciences(XDB16 and XDPB09);Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region(NJYT-18-B21);Doctoral Scientific Research Foundation of Inner Mongolia University for Nationalities(BS365 and BS400);The Fundamental Research Funds for the Central Universities(GK201903022);Natural Science Foundation of Inner Mongolia(2018MS01009) |
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| 摘 要： | The Efimov(Thomas) trimers in excited 12 C nuclei, for which no observation exists yet, are discussed by means of analyzing the experimental data of 70(64)Zn(64 Ni)+ 70(64)Zn(64 Ni) reactions at the beam energy of E/A = 35 MeV/nucleon. In heavy ion collisions, a-particles interact with each other and can form complex systems such as 8 Be and 12 C. For the 3 a-particle systems,multi-resonance processes give rise to excited levels of 12 C. The interaction between any two of the 3 a-particles provides events with one, two or three 8 Be. Their interfering levels are clearly seen in the minimum relative energy distributions. Events with the three a-particle relative energies consistent with the ground state of 8 Be are observed with the decrease of the instrumental error for the reconstructed 7.458 MeV excitation level in 12 C, which was suggested as the Efimov(Thomas) state.
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| 关 键 词： | heavy ion REACTIONS Efimov state α-particle RESONANCES relative KINETIC energy |
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