$2r>r,$

$C_4=\frac{3}{2}N(\frac{5}{2}\frac{L_{\frac{5}{2}}(z)}{L_{\frac{3}{2}}(z)}-\frac{3}{2}\frac{L_{\frac{3}{2}}(z)}{L_{\frac{1}{2}}(z)})$

$$

$C_8=\frac{15}{4}\frac{(\frac{5}{2})}{(\frac{3}{2})}Nk(\frac{T}{T_6}{)}^{\frac{3}{2}}$