%0 Journal Article
%T Entrance-Channel Dependence of Isospin Effects on Double n/p Ratio in HIC<br>
%A ZHANG Fang
%A ZUO Wei
%A <br>
%J 中国物理快报
%D 2008
%I 
%X 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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%K 70
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%K -t
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%K 10
%K Lx<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=17FABC1865A3921AAE5ACD67A7979C11&yid=67289AFF6305E306&vid=C5154311167311FE&iid=DF92D298D3FF1E6E&sid=9988E57A3960B075&eid=E2AE6FE010839FF3&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=0