Re-examination of Finite-Size Effects in Isobaric Yield Ratios Using a Statistical Abrasion-Ablation Model
MA Chun-Wang1**, WANG Shan-Shan1, WEI Hui-Ling1, MA Yu-Gang2**
1Department of Physics, Henan Normal University, Xinxiang 453007 2Department of Nuclear Physics, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800
Abstract：The "finite-size" effects in the isobaric yield ratio (IYR), which are shown in the standard grand-canonical and canonical statistical ensembles (SGC/CSE) method, are claimed to prevent the actual values of physical parameters from being obtained. The conclusion of SGC/CSE may be questionable for neutron-rich nucleus-induced reactions. To investigate whether the IYR has finite-size effects, we re-examine the IYR for the mirror nuclei [IYR(m)] using a modified statistical abrasion-ablation (SAA) model. It is found that when the projectile is not so neutron-rich, the IYR(m) depends on the isospin of the projectile, but size dependence can not be excluded. In reactions induced by the very neutron-rich projectiles, contrary results to those of the SGC/CSE models are obtained, i.e., the dependence of the IYR(m) on the size and the isospin of the projectile is weakened and disappears in both the SAA and experimental results.
. [J]. 中国物理快报, 2013, 30(5): 52501-052501.
MA Chun-Wang, WANG Shan-Shan, WEI Hui-Ling, MA Yu-Gang. Re-examination of Finite-Size Effects in Isobaric Yield Ratios Using a Statistical Abrasion-Ablation Model. Chin. Phys. Lett., 2013, 30(5): 52501-052501.
2013, Vol. 30 
