Isoscaling in central Sn+Sn collisions at 270 MeV/u
Isoscaling in central Sn+Sn collisions at 270 MeV/u
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DOI：
10.1140/epja/s10050-022-00851-2
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发表时间：
2022-10
期刊：
影响因子：
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通讯作者：
J. Lee;M. Tsang;C. Tsang;R. Wang;J. Barney;J. Estee;T. Isobe;M. Kaneko;M. Kurata-Nishimura;W. G. Lynch;T. Murakami;A. Ono;S. Souza;D. Ahn;L. Atar;T. Aumann;H. Baba;K. Boretzky;J. Brzychczyk;G. Cerizza;N. Chiga;N. Fukuda;I. Gašparić;B. Hong;A. Horvat;K. Ieki;N. Ikeno;N. Inabe;G. Jhang;Y. Kim;T. Kobayashi;Y. Kondo;P. Lasko;H. Lee;Y. Leifels;J. Lukasik;J. Manfredi;A. McIntosh;P. Morfouace;T. Nakamura;N. Nakatsuka;S. Nishimura;H. Otsu;P. Pawlowski;K. Pelczar;D. Rossi;H. Sakurai;C. Santamaria;H. Sato;H. Scheit;R. Shane;Y. Shimizu;H. Simon;A. Snoch;A. Sochocka;T. Sumikama;H. Suzuki;D. Suzuki;H. Takeda;S. Tangwancharoen;Y. Togano;Z. Xiao;S. Yennello;Y. Collaboration;D. Physics;Korea University;Seoul.;R. Korea.;Facility for Rare Isotope Beams;M. University;E. Lansing.;Michigan.;Usa;Astronomy;Riken Nishina Center;Wako;Saitama;Japan.;Kyoto University;T. University;Sendai;I. D. F'isica;U. F. R. D. Janeiro;Centro Interuniversitario de Historia das Ciencias e da Tecnologia-Centro-Interuniversitario-de-Historia-das-Ciencias-72426587;A. Bloco;R. Janeiro;Brazil;Departamento de Engenharia Nuclear;Universidade Federal de Minas Gerais Ufmg;Av. Antônio Carlos;M. Gerais;I. F. Kernphysik;Technische Universitat Darmstadt;Darmstadt;Germany;G. H. F. Schwerionenforschung;F. O. Physics;A. Science;J. University;Krak'ow;Poland;D. Physics;Rudjer Boskovic Institute;Zagreb;Croatia.;R. University;Tokyo;Department of Life;E. Sciences;Tottori University;Rare Isotope Science Project;Institute for Computational Science;Daejeon;Tokyo Institute of Technology;Institute of Nuclear Physics Pan;C. Institute;Texas A M University;College Station;Texas;Nikhef National Institute for Subatomic Physics;Amsterdam;Netherlands.;Tsinghua University;Beijing;P. China;D. Chemistry
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作者：
J. Lee;M. Tsang;C. Tsang;R. Wang;J. Barney;J. Estee;T. Isobe;M. Kaneko;M. Kurata-Nishimura;W. G. Lynch;T. Murakami;A. Ono;S. Souza;D. Ahn;L. Atar;T. Aumann;H. Baba;K. Boretzky;J. Brzychczyk;G. Cerizza;N. Chiga;N. Fukuda;I. Gašparić;B. Hong;A. Horvat;K. Ieki;N. Ikeno;N. Inabe;G. Jhang;Y. Kim;T. Kobayashi;Y. Kondo;P. Lasko;H. Lee;Y. Leifels;J. Lukasik;J. Manfredi;A. McIntosh;P. Morfouace;T. Nakamura;N. Nakatsuka;S. Nishimura;H. Otsu;P. Pawlowski;K. Pelczar;D. Rossi;H. Sakurai;C. Santamaria;H. Sato;H. Scheit;R. Shane;Y. Shimizu;H. Simon;A. Snoch;A. Sochocka;T. Sumikama;H. Suzuki;D. Suzuki;H. Takeda;S. Tangwancharoen;Y. Togano;Z. Xiao;S. Yennello;Y. Collaboration;D. Physics;Korea University;Seoul.;R. Korea.;Facility for Rare Isotope Beams;M. University;E. Lansing.;Michigan.;Usa;Astronomy;Riken Nishina Center;Wako;Saitama;Japan.;Kyoto University;T. University;Sendai;I. D. F'isica;U. F. R. D. Janeiro;Centro Interuniversitario de Historia das Ciencias e da Tecnologia-Centro-Interuniversitario-de-Historia-das-Ciencias-72426587;A. Bloco;R. Janeiro;Brazil;Departamento de Engenharia Nuclear;Universidade Federal de Minas Gerais Ufmg;Av. Antônio Carlos;M. Gerais;I. F. Kernphysik;Technische Universitat Darmstadt;Darmstadt;Germany;G. H. F. Schwerionenforschung;F. O. Physics;A. Science;J. University;Krak'ow;Poland;D. Physics;Rudjer Boskovic Institute;Zagreb;Croatia.;R. University;Tokyo;Department of Life;E. Sciences;Tottori University;Rare Isotope Science Project;Institute for Computational Science;Daejeon;Tokyo Institute of Technology;Institute of Nuclear Physics Pan;C. Institute;Texas A M University;College Station;Texas;Nikhef National Institute for Subatomic Physics;Amsterdam;Netherlands.;Tsinghua University;Beijing;P. China;D. Chemistry
碎片发射的实验信息对于理解核碰撞动力学和发展模拟重离子碰撞的输运模型是重要的。在重离子碰撞中发射的复杂碎片的组成可以用统计模型来解释，该模型假设在低于100 MeV/u的碰撞能量下达到热平衡。我们的新的实验数据与理论分析一起从Sn+Sn碰撞在270 MeV/u的轻粒子，表明热平衡的假设打破了高转移动量发射的粒子。为了考察系统在这种极限下的性质，在统计多重碎裂模型和反对称化分子动力学模型的框架下，研究了丰中子系统和近对称系统粒子产额比的标度特性.低能粒子的等标度符合这两种模型。然而，所观察到的高横动量粒子的等标度分解不能用反对称化的分子动力学模型来解释。
Experimental information on fragment emissions is important in understanding the dynamics of nuclear collisions and in the development of transport model simulating heavy-ion collisions. The composition of complex fragments emitted in the heavy-ion collisions can be explained by statistical models, which assume that thermal equilibrium is achieved at collision energies below 100 MeV/u. Our new experimental data together with theoretical analyses for light particles from Sn+Sn collisions at 270 MeV/u, suggest that the hypothesis of thermal equilibrium breaks down for particles emitted with high transfer momentum. To inspect the system’s properties in such limit, the scaling features of the yield ratios of particles from two systems, a neutron-rich system ofand a nearly symmetric system of, are examined in the framework of the statistical multifragmentation model and the antisymmetrized molecular dynamics model. The isoscaling from low energy particles agree with both models. However the observed breakdown of isoscaling for particles with high transverse momentum cannot be explained by the antisymmetrized molecular dynamics model.