1 \documentclass[12pt
]{article
}
6 \left\
{\begin{array
}{l
}
7 \eta_{ij
}=
\delta_{ij
},
\xi_{IJ
}=
1 \\
8 U_
{IJ
}\left(r
\right)=
\frac{D_
{e,IJ
}}{S_
{IJ
}-
1}\cdot exp
\left[-
\beta_{IJ
}\sqrt{2S_
{IJ
}\left(r-r_
{e,IJ
}\right)
}\right]\cdot f_
{c,IJ
}\left(r
\right) \\
9 V_
{IJ
}\left(r
\right)=
\frac{S_
{IJ
}\cdot D_
{e,IJ
}}{S_
{IJ
}-
1}\cdot exp
\left[-
\beta_{IJ
}\sqrt{\frac{2}{S_
{IJ
}}\left(r-r_
{e,IJ
}\right)
}\right]\cdot f_
{c,IJ
}\left(r
\right) \\
10 F_
{IJ
}\left(X
\right)=
\left(
1+X
\right)^
{-
\frac{1}{2}} \\
11 P_
{IJ
}\left(
\Delta r
\right)=exp
\left(
2\mu_{IK
}\cdot \Delta r
\right) \\
12 W_
{IJ
}\left(r
\right)=f_
{c,IK
}\left(r
\right) \\
13 G_
{JIK
}\left(
\theta\right)=
\gamma_{IK
}\left[1+
\frac{c_
{IK
}^
2}{d_
{IK
}^
2}-
\frac{c_
{IK
}^
2}{d_
{IK
}^
2+
\left(h_
{IK
}+cos
\theta\right)^
2}\right]