LIU Jian-Ye 1,2,3, XIAO Guo-Qing 1,2, GUO Wen-Jun 5, REN Zhong-Zhou 1,4, ZUO Wei 1,2, LEE Xi-Guo 1,2
1Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 7300002Institute of Modern Physics, Chinese Academy of Sciences, PO Box31, Lanzhou 7300003Institute of Basic Physics, College of Mathematics-Physics and Information, Tianshui Normal University, Tianshui 7410004Department of Physics, Nanjing University, Nanjing 2100085Science College, University of Shanghai for Science and Technology, Shanghai 200093
1Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 7300002Institute of Modern Physics, Chinese Academy of Sciences, PO Box31, Lanzhou 7300003Institute of Basic Physics, College of Mathematics-Physics and Information, Tianshui Normal University, Tianshui 7410004Department of Physics, Nanjing University, Nanjing 2100085Science College, University of Shanghai for Science and Technology, Shanghai 200093
摘要Based on both very obvious isospin effect of the neutron--proton number ratio of nucleon emissions (n/p) nucl on symmetry potential and (n/p) nucl's sensitive dependence on symmetry potential in the nuclear reactions induced by halo-neutron projectiles, compared to the same mass stable projectile, probing symmetry potential is investigated within the isospin-dependent quantum molecular dynamics with isospin and momentum-dependent interactions for different symmetry potentials U1sym and U2sym. It is found that the neutron-halo projectile induces very obvious increase of (n/p) nucl and strengthens the dependence of (n/p) nucl on the symmetry potential for all the beam energies and impact parameters, compared to the same mass stable projectile under the same incident channel condition. Therefore (n/p) nucl induced by the neutron-halo projectile is a more favourable probe than the normal neutron-rich and neutron-poor projectiles for extracting the symmetry potential.
Abstract：Based on both very obvious isospin effect of the neutron--proton number ratio of nucleon emissions (n/p) nucl on symmetry potential and (n/p) nucl's sensitive dependence on symmetry potential in the nuclear reactions induced by halo-neutron projectiles, compared to the same mass stable projectile, probing symmetry potential is investigated within the isospin-dependent quantum molecular dynamics with isospin and momentum-dependent interactions for different symmetry potentials U1sym and U2sym. It is found that the neutron-halo projectile induces very obvious increase of (n/p) nucl and strengthens the dependence of (n/p) nucl on the symmetry potential for all the beam energies and impact parameters, compared to the same mass stable projectile under the same incident channel condition. Therefore (n/p) nucl induced by the neutron-halo projectile is a more favourable probe than the normal neutron-rich and neutron-poor projectiles for extracting the symmetry potential.
[1] Tanihata I, Hamagaki H Hashimoto O et al 1985 Phys. Rev.Lett. 55 2676 [2]Tanihata I, Hamagaki H, Hashimoto O et al 1985 Phys.Lett. B 160 380 [3] Mittig W, Chouvel J M, Zhan W L et al 1987 Phys. Rev.Lett. 59 1889 [4]Pietro A, Figuera P, Amorini A et al 2004 Phys. Rev. C 69 044613 [5]Gomes P R S, Anjos R M, Muri C et al 2004 Phys. Rev. C 70 054605 [6]Ma Y G and Shen W Q et al 1993 Phys. Rev. C 48 850 [7]Zhao Y L, Ma Z Y, Chen B Q et al 2001 High Energy Phys.Nucl. Phys. 26 506 [8]Ren Z Z, Xu G G, Chen B Q et al 1995 Phys. Lett. B 252 311 [9]Liu Z H, Ruan M, Zhao Y L, Zhang H Q et al 2004 Phys.Rev. C 69 034326 [10]Guo W J, Jian H Q, Liu J Y, Zuo W, Ren Z Z and Lee X G 2003 Commun. Theor. Phys. 40 577 [11]Carstoiu F, Trache L, Robert Tribble E et al 2004 Phys.Rev. C 70 054610 [12]Navin A, Tripathi V, Blumenfeld Y et al 2004 Phys. Rev.C 70 044601 [13] Lin C J, Liu Z H and Zhang H Q 2001 Chin. Phys. Lett. 18 1183 [14]Alamanos N, Pakou A, Lapoux V et al 2002 Phys. Rev. C 65 054606 [15]Fukuda N, Nakamura N, Aoi N et al 2004 Phys. Rev. C 70 054606 [16] Zadro M 2004 Phys. Rev. C 70 044605 [17]Rusek K, Alamanos N, Keeley N et al 2004 Phys. Rev. C 70 014603 [18]Liu J Y, Guo W, Ren Z Z, Xing Y Z et al 2005 Phys.Lett. B 617 24 [19]Cai X Z, Zhang H Y, Shen W Q, Ren Z Z et al 2002 Phys.Rev. C 65 024610 [20]Gomez Camacho A, Aguilera E F et al 2004 Nucl. Phys. A 735 425 [21]Suzuki T, Ogawa Y, Chiba M, Fukuda M et al 2002 Phys.Rev. Lett. 89 012501 [22]Bertsch G F and Gupta S D 1988 Phys. Rep. 160 1991 [23]Aichelin A, Rosenhauer A, Peilert G, Stoecker H and Greiner W1987 Phys. Rev. Lett. 58 1926 [24]Aichelin J, Peilert G, Bohnet A, Rosenhauer A et al 1988 Phys. Rev. C 37 2451 [25]Reinhard P G et al 2000 Comput. Nucl. Phys. 1 28 [26]Liu J Y, Xing Y Z and Guo W J 2003 Chin. Phys. Lett. 20 8329 [27]Li B A, Ko C W and Bauer W 1998 Int. J. Mod. Phys. E 7 147 [28]Li B A and Udo Schr W \"oder 2001 Isospin Physics in Heavy-IonCollisions at Intermediate Energies (New York: Nova Science) [29]Liu J Y, Guo W J, Xing Y Z and Lee Xi Guo 2005 Chin.Phys. Lett. 22 65 [30]Klakow D, Welke G and Bauer W 1993 Phys. Rev. C 48 1982 [31]Alkahzov G, Bauer T and Bertini R 1977 Nucl. Phys. A 280 365
2007, Vol. 24 
