Scaling of anisotropy flows in intermediate energy heavy ion collisions

Abstract

Anisotropic flows ($v_1$, $v_2$ and $v_4$) of light nuclear clusters are studied by a nucleonic transport model in intermediate energy heavy ion collisions. The number-of-nucleon scalings of the directed flow ($v_1$) and elliptic flow ($v_2$) are demonstrated for light nuclear clusters. Moreover, the ratios of $v_4/v_2^2$ of nuclear clusters show a constant value of 1/2 regardless of the transverse momentum. The above phenomena can be understood by the coalescence mechanism in nucleonic level and are worthy to be explored in experiments.Comment: Invited talk at "IX International Conference on Nucleus-Nucleus Collisions", Rio de Janeiro, Aug 28- Sept 1, 2006; to appear on the proceeding issue in Nuclear Physics

Systematic behavior in the isospin dependence of projectile fragmentation of mirror nuclei withA= 20–60

“…It was developed by Brohm and Schmidt to describe the peripheral nuclear collisions at high energy [25] and was modified by Fang and Zhong et al to study the projectile fragmentation at intermediate energies [13,[26][27][28][29][30][31]. In [14] and [23], the SAA model has reproduced the cross sections of fragments produced in the 140 A MeV 40,48 Ca+ 9 Be and 58,64 Ni + 9 Be experimental data well. The details of the SAA model can be found in [13,25,27].…”

“…Projectile fragmentation is a well-established technique for the production of rare isotope beams used by many RIB facilities around the world. By studying projectile fragmentation, not only the reaction mechanics of asymmetric nucleus but also information on fundamental nuclear physics can be obtained [5][6][7][8][9][10][11][12].…”

Isospin dependence of projectile-like fragment production at intermediate energies

“…The process of projectile fragmentation has been studied extensively to investigate the reaction mechanisms in heavy ion collisions at intermediate and high energies. Understanding the physics of projectile fragmentation is important not only for rare-isotope beam production purposes but also for the fundamental nuclear physics processes involved in nuclear collisions [1,2,3,4,5,6,7].…”