Fermi Momentum of Aluminum from 0 to 100 kbar

The Fermi momentum of aluminum was studied from 0 to 100 kbar at room temperature through the utilization of positron annihilation. Over this pressure range, the Fermi momentum of aluminum is very well described by the free-electron model which predicts that the Fermi momentum of a metal is given by $p_F=\hslash {\left(\frac{3{\pi }^{2}Z}{V}\right)}^{\frac{1}{3}}$, where $Z$ is the number of conduction electrons per unit cell in the lattice and $V$ is the volume of the unit cell.