Re-examination of Finite-Size Effects in Isobaric Yield Ratios Using a Statistical Abrasion-Ablation Model

doi:10.1088/0256-307X/30/5/052501

Chin. Phys. Lett.

2013, Vol. 30

Issue (5): 052501 DOI: 10.1088/0256-307X/30/5/052501

NUCLEAR PHYSICS

Re-examination of Finite-Size Effects in Isobaric Yield Ratios Using a Statistical Abrasion-Ablation Model

MA Chun-Wang^1**, WANG Shan-Shan¹, WEI Hui-Ling¹, MA Yu-Gang^2**

¹Department of Physics, Henan Normal University, Xinxiang 453007
²Department of Nuclear Physics, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800

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MA Chun-Wang, WANG Shan-Shan, WEI Hui-Ling et al 2013 Chin. Phys. Lett. 30 052501

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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.

Received: 15 October 2012 Published: 31 May 2013

PACS:	25.70.Pq	(Multifragment emission and correlations)
	21.65.Cd	(Asymmetric matter, neutron matter)
	25.70.Mn	(Projectile and target fragmentation)
	24.60.-k	(Statistical theory and fluctuations)

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https://cpl.iphy.ac.cn/10.1088/0256-307X/30/5/052501 OR https://cpl.iphy.ac.cn/Y2013/V30/I5/052501

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	MA Chun-Wang
	WANG Shan-Shan
	WEI Hui-Ling
	MA Yu-Gang

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