Isospin dependence of projectile-like fragment production at intermediate energies

Journal Article · Sun Mar 15 04:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.79.034606· OSTI ID:21199622

Chunwang, Ma; Huiling, Wei; Junyang, Wang; Gaojie, Liu; Yao, Fu; Deqing, Fang; Wendong, Tian; Xiangzhou, Cai; Hongwei, Wang; Yugang, Ma ^[1]

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1. College of Physics and Information Engineering, Henan Normal University, Xinxiang 453007 (China)

The cross sections of fragments produced in 140 A MeV {sup 40,48}Ca+{sup 9}Be and {sup 58,64}Ni+{sup 9}Be reactions are calculated by the statistical abration-ablation (SAA) model and compared to the experimental results measured at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University. The fragment isotopic and isotonic cross section distributions of {sup 40}Ca and {sup 48}Ca, {sup 58}Ni and {sup 64}Ni, {sup 40}Ca and {sup 58}Ni, and {sup 48}Ca and {sup 64}Ni are compared and the isospin dependence of the projectile fragmentation is studied. It is found that the isospin dependence decreases and disappears in the central collisions. The shapes of the fragment isotopic and isotonic cross section distributions are found to be very similar for symmetric projectile nuclei. The shapes of the fragment isotopic and isotonic distributions of different asymmetric projectiles produced in peripheral reactions are found to be very similar. The similarity of the distributions are related to the similar proton and neutron density distributions inside the nucleus in framework of the SAA model.

• OSTI ID: 21199622
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 79; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ABLATION
ASYMMETRY
BERYLLIUM 9
CALCIUM 40
CALCIUM 48
COLLISIONS
COMPARATIVE EVALUATIONS
CROSS SECTIONS
DISTRIBUTION
ISOSPIN
MEV RANGE 100-1000
NEUTRON DENSITY
NICKEL 58
NICKEL 64
NUCLEAR FRAGMENTATION
NUCLEAR REACTIONS
PROTONS
SIMULATION
STATISTICAL MODELS
SUPERCONDUCTING CYCLOTRONS