Irradiation growth texture factor
= Irradiation growth texture factor
{title2=$G_d=1-3\langle\cos^2\theta\rangle$}
In an ideal axisymmetric volume-conserving <crystal grain> model, directional growth is proportional to $1-3\langle\cos^2\theta\rangle$, where $\theta$ is the angle between that direction and the crystal c-axis. Random <crystallographic texture> has $\langle\cos^2\theta\rangle=1/3$.