Using the isospin dependent quantum molecular dynamics model, we study the
effect of charge asymmetry and isospin dependent cross-section on
d()dN and ptdptdN. Simulations have been
carried out for the reactions of 124Xm+124Xm, where m = (47, 50
and 59) and 40S16+40S16. Our study shows that these parameters
depend strongly on the isospin of cross-section and charge asymmetry. The
distribution of nucleons and fragments is not symmetric around the beam axis