Effect of local density dependence on the exchange and direct part of a-a interaction potential

M.Y. Ismail, H. Elgebaly* and M.M. Osman

Physics Department, Faculty of Science, Cairo University, Cairo (Egypt).

Received on May 09, 2010 and accepted on June 21, 2010

ABSTRACT

The study show that the error in neglecting s-dependence affects strongly both the values of U ex and Utot . This effect is about 30 %( 23%) in U ex (Utot) for the force BDM3Y2-Reid type while it is less than 7% for BDM3Y1-Ried. It decreases as a– a separation distance increases. For BDM3Y3 type force the corresponding error is too large at separation distance R=0.

Keywords : a-a interaction potential, local density dependence.