Strangeness enhancement in Cu-Cu and Au-Au collisions at √S(NN)=200 GeV

We report new STAR measurements of midrapidity yields for the Λ, Λ[over ˉ], K(S)(0), Ξ(-), Ξ[over ˉ](+), Ω(-), Ω[over ˉ](+) particles in Cu+Cu collisions at √S(NN)==200 GeV, and midrapidity yields for the Λ, Λ[over ˉ], K(S)(0) particles in Au+Au at √S(NN)==200 GeV. We show that, at a given number of participating nucleons, the production of strange hadrons is higher in Cu+Cu collisions than in Au+Au collisions at the same center-of-mass energy. We find that aspects of the enhancement factors for all particles can be described by a parametrization based on the fraction of participants that undergo multiple collisions.     

ChemInform Abstract: Superhalogens as Building Blocks of Halogen-Free Electrolytes in Lithium-Ion Batteries.

In the search for halogen-free electrolytes, the electronic structure of current electrolytes is studied via DFT-based first-principles calculations of the ground state geometries and total energies of anionic BF₄^-, PF₆^-, AsF₆^-, FePO₄^-, ClO₄^-, N(SO₂F)₂^-, and N(SO₂F₃)₂^-.