Long-range angular correlation in dissipative reaction of ²⁷Al+²⁷Al

Long-range angular correlation in dissipative reaction of 27 Al+ 27 Al 1 first-author 1 1 1 1 1 2 4 2 4 3 2 2 4 3 2 4 2 4 2 2 5 Institute of Modern Physics, the Chinese Academy of Sciences, Lanzhou 730000 Institute of Modern Physics, the Chinese Academy of Sciences, Lanzhou 730000 1Istituto Nazionale di Fisica Nucleare, Laboratori Nazionale del Sud Catania, Italy 1Istituto Nazionale di Fisica Nucleare, Laboratori Nazionale del Sud Catania, Italy 2Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Italy 2Istituto Nazionale di Fisica Nucleare, Sezione di Catania, Italy 3Dipartimento di Fisica, Universita di Catania, Italy 3Dipartimento di Fisica, Universita di Catania, Italy Centre de Recherches Nucleaires, Strasbourg, France Centre de Recherches Nucleaires, Strasbourg, France Angular correlation of excitation functions in dissipative heavy ion collision 27 Al+ 27 Al has been measured. The incident beam energies ranged from 114 MeV to 127 MeV in steps of 200 keV. The angular analysis region was continuous from 50° to 90° in the center of mass system. An angular coherent width, at least 40°, was obtained. This long-range angular correlation could not be interpreted in the framework of the standard statistical reaction theory with state of equilibrium or near equilibrium, maybe it reveals the formation of a new kind of dissipative structure in the reaction of 27 Al+ 27 Al with the state that is far from equilibrium. Dissipative heavy ion collision Long-range angular correlation State far from equilibrium Dissipative structure References De Rosa A , Inglima G , Russo V et al . Phys Lett , 1985 , B160 : 239 ~ 242 Phys Lett Suomijarvi T , Berthier B , Lucas R et al . Phys Rev , 1987 , C36 : 181 ~ 186 Phys Rev Rizzo F , Cardella G , De Rosa A et al . Z Phys , 1994 , A349 : 169 ~ 175 Z Phys Wang Q , Lu J , Xu H S et al . Phys Lett , 1996 , B388 : 462 ~ 467 Phys Lett Berceanu I , Andronic A , Duma M et al . Phys Rev , 1998 , C57 : 2359 ~ 2369 Phys Rev Richter A . Nuclear spectroscopy and reactions, Part B , In: Cerny J ed. 1974 , 343 Nuclear spectroscopy and reactions, Part B Brink D M , Stephen R O , Tanner N W . Nucl Phys , 1964 , 54 : 577 ~ 585 Nucl Phys Hartmann K M , Dunnweber W , Frahn W E . Nucl Phys , 1982 , A380 : 170 ~ 188 Nucl Phys Kun S Y . Z Phys , 1997 , A357 : 255~269, 271~281, 367~375 Z Phys O571.6, O571.41 + 4 Supported by the National Natural Science Foundation of China (No.19775057), the Chinese Academy of Sciences (KJ95T-03) and the Laboratorio Nazionnale del Sud, Istituto Nazionale di Fisica Nucleare, Italia 2000-01-05 2000-08-01 2021-02-05 2000 Nuclear Science and Techniques 3 11