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Entrance-Channel Dependence of Isospin Effects on Double n/p Ratio in HIC |
| ZHANG Fang1,2, ZUO Wei1 |
| 1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 7300002School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000 |
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| Cite this article: |
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ZHANG Fang, ZUO Wei 2008 Chin. Phys. Lett. 25 2436-2439 |
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Abstract Within the hadronic transport model IBUU04, we investigate the effect of density-dependent symmetry energy on double neutron/proton (n/p) ratio of free nucleons in heavy ion collisions by taking four isotopic Sn+Sn reaction systems. Especially the entrance-channel asymmetry and impact-parameter dependence of the effect of symmetry energy are discussed. It is found that in both central and semi-central collisions the sensitivity of the double n/p ratio to the density-dependent symmetry energy is more pronounced in neutron-richer systems. Our results also indicate clearly that the effect of symmetry energy is stronger in central collisions than that in semi-central collisions.
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| Keywords:
25.70.-z
25.60.-t
24.10.Lx
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Received: 07 April 2008
Published: 26 June 2008
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| PACS: |
25.70.-z
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(Low and intermediate energy heavy-ion reactions)
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25.60.-t
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(Reactions induced by unstable nuclei)
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24.10.Lx
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(Monte Carlo simulations (including hadron and parton cascades and string breaking models))
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