Origin of the finite nuclear spin and its effect in intermediate energy heavy ion collisions

Origin of the finite nuclear spin and its effect in intermediate energy heavy ion collisions 1 first-author 1 1 1 corresp Corresponding author. E-mail address: ygma@sinap.ac.cn Corresponding author. E-mail address: ygma@sinap.ac.cn ygma@sinap.ac.cn 1 1 1 1 1 1 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China The heavy-ion phase-space exploration (HIPSE) model is used to discuss the origin of the nuclear spin in intermediate energy heavy-ion collision (HIC). The spin of maximal projectile-like fragment is found to depend strongly on impact parameter of a reaction system, while it relates weakly to the collision violence. Some interesting multi-fragmentation phenomena related to the spin are shown. We also found that the excitation energy in the de-excitation stage plays a robust role at the de-excitation stage in HIC. Nuclear spin Projectile multifragmentation Projectile evaporation Phase transition References Bonasera A , Chen Z , Wada R , et al . Phys Rev Lett , 2008 , 101 : 122702(1-4) . Phys Rev Lett Ma Y G , Natowitz J B , Wada R , et al . Phys Rev C , 2005 , 71 : 054606(1-23) . Phys Rev C Ma Y G . Phys Rev Lett , 1999 , 83 : 3617 - 3620 . Phys Rev Lett Borderie B , Rivet M F . Prog Part Nucl Phys , 2008 , 61 : 551 - 601 . Prog Part Nucl Phys Elliott J B , Moretto L G , Phair L , et al . Phys Rev Lett , 2002 , 88 : 042701(1-4) . Phys Rev Lett Ma Y G . Eur Phys J A , 2006 , 30 : 227 - 242 . Eur Phys J A Lopez O , Lacroix D , Vient E . Phys Rev Lett , 2005 , 95 : 242701 , 1 - 4 . Phys Rev Lett Pichon M , Tamain B , Bougault R , et al . Nucl Phys A , 2006 , 779 : 267 - 296 . Nucl Phys A Gross D H E . Eur Phys J A . 2006 , 30 : 293 - 302 . Eur Phys J A Ma Y G , Wada R , Hagel K , et al . Phys Rev C , 2004 , 69 : 031604(R), 1-5 . Phys Rev C D'Agostino M , Gulminelli F , Chomaz Ph , et al . Phys Lett B , 2000 , 473  : 219 - 225 . Phys Lett B Lacroix D , Van Lauwe A , Durand D . Phys Rev C , 2004 , 69 : 054604(1-12) . Phys Rev C Ring P , Schuck P . The Nuclear Many-Body Problem . New-York : Spring-Verlag , 1980 , 33 . The Nuclear Many-Body Problem Durand D . Nucl Phys A , 1992 , 541 : 266 - 294 . Nucl Phys A Fèvre A Le , Aichelin J , Hartnack C , et al . Phys Rev C , 2009 , 80 : 044615(1-11) . Phys Rev C 10.13538/j.1001-8042/nst.23.61-64 Partially supported by NSFC of China under contract No. 11035009, No. 10979074, No.10875160, No. 10805067 and No. 10975174, the 973-Program under contract No. 2007CB815004, the Shanghai Development Foundation for Science and Technology under contract No. 09JC1416800, the Knowledge Innovation Project of CAS under Grant No. KJCX2-EW-N01. 2011-04-26 2012-02-20 2021-01-19 2012 Nuclear Science and Techniques 01 23