In which 5f subshell is half-filled?

Americium (Z = 95) and curium (Cm, Z = 96) have [Rn] $5{\mathrm{f}}^7$$6{\mathrm{d}}^{0}7{\mathrm{s}}^2$ and [Rn] $5{\mathrm{f}}^{7}6{\mathrm{d}}^{1}7{\mathrm{s}}^2$ configuration, respectively.