若圆\({x}^{2}+{y}^{2}=4 \)与圆\({x}^{2}+{y}^{2}+2ay-6=0 (a > 0)\)的公共弦长为\(2 \sqrt{3} \),则\(a\)\(=\_\) \(\_ .\)
进入组卷