Figure 1

The experimental geometry. The incident electron beam makes an angle $\psi$ with respect to the detection plane defined by the analyzers. $\psi =0°$ defines a coplanar geometry, $\psi =90°$ a perpendicular geometry. The analyzers rotate through angles ${\xi }_1$ and ${\xi }_2$ as shown. In the current experiments ${\xi }_1={\xi }_2$. A common normalization point exists for all gun angles when ${\xi }_1={\xi }_2=90°$.Reuse & Permissions

Figure 2

(Color online) Triple differential cross sections for the electron-impact ionization of ${\text{H}}_2$ for equal-energy sharing between the outgoing electrons $\left(E_1=E_2=10\text{eV}\right)$. We present cross sections for various values of the gun angle $\psi$, as a function of the angle $\xi$, where $2\xi$ is the angle between the outgoing electrons. The measurements are compared with TDCC calculations and two sets of 3DW calculations; one including a correlation-polarization potential [labeled 3DW (with CP)] and one without this potential [labeled 3DW (no CP)]. Both sets of 3DW calculations are divided by 6.3 to allow a better comparison with the other results. $1\text{kb}=1.0\times {10}^{-21}{\text{cm}}^2$; $1\text{kb}/{\text{sr}}^2\text{eV}\approx 1\times {10}^{-3}\text{a}\text{.u}\text{.}$Reuse & Permissions

Figure 3

(Color online) Same as Fig. 2, except for unequal-energy sharing: $E_1=18\text{eV}$; $E_2=2\text{eV}$, for $\psi$ values ranging from 0 to 45 degrees. The 3DW (with CP) cross sections are divided by 3.7 and the 3DW (no CP) cross sections are divided by 4.5 to allow a better comparison with the other results.Reuse & Permissions

Figure 4

(Color online) Same as Fig. 3, for $\psi$ values ranging from 50 to 90 degrees.Reuse & Permissions