%0 Journal Article
%T Determination of Orientations in Deformed U--U Collisions at 0.52GeV/u<br>
%A WU Ke-Jun
%A XIE Fei
%A ZHOU You
%A LIU Feng
%A XU Nu
%A <br>
%J 中国物理快报
%D 2008
%I 
%X The ART model is applied to study the deformed UU collision at HIRFL-CSR energy area corresponding to the high baryon density region in the QCD phase diagram. The time evolution of central baryon (energy) densities in central collisions at Eb =0.52GeV/u shows that different orientation collisions will lead to different lifetimes of high density, especially tip--tip UU collisions which have an extend lifetime for the high density phase by almost a factor of 2 compared to the body--body orientation collisions. In order to pick out the interesting tip--tip like events from a mass of random orientation collisions, we study the relation between stopping power R and impact parameter b in different orientation collisions and find that it can enhance the purity of tip--tip like events when R increases. Therefore, the high density and long lifetime events can be effectively distinguished by R selection.
%K 21
%K 60
%K Ka
%K 21
%K 10
%K Re
%K 24
%K 10
%K Lx<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=14F24B8D98143D9BCC3128A60973ED13&yid=67289AFF6305E306&vid=C5154311167311FE&iid=9CF7A0430CBB2DFD&sid=921FCEED1EEAD745&eid=D3B978E5415EE417&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=0