Figure 1

(Color online) Double photoionization by $160\mathrm{eV}$ circular polarized photons. Horizontal axis: angle between molecular axis and the sum momentum of the electron pair $k_e^{+}$. Molecular axis and $k_e^{+}$ are confined within $\pm 20\mathrm{deg}$ to the polarization plane. In (a) and (c) the vertical axis is the kinetic energy release (KER), in (b) and (d) it is the modulus of the electron sum momentum. (a) and (b) show the pattern for the whole KER range and for all sum momenta, (c) shows the same as (a) but for a restriction on the sum momenta: $3\mathrm{a.u.}<k^{+}<4\mathrm{a.u.}$, (d) shows the same as (b) with a limitation of the kinetic energy release: $18\mathrm{eV}<\mathrm{KER}<22\mathrm{eV}$.Reuse & Permissions

Figure 2

(Color online) In (a), (b), and (c) different slices of Fig. 1c are shown to examine the KER and hence the R dependence of the interference pattern. The solid line is a guide to the eye. $k_e^{+}$ as well as $k_p^{-}$ are restricted in the polarization plane of the circular polarized light within $\pm 20\mathrm{deg}$, the molecular axis is fixed horizontally $\pm 10\mathrm{deg}$. In (a) the angular distribution is presented for $16\mathrm{eV}<\mathrm{KER}<18\mathrm{eV}$ $(R\approx 0.85\mathrm{\AA })$, in (b) it is $20\mathrm{eV}<\mathrm{KER}<22\mathrm{eV}$ $(R\approx 0.65\mathrm{\AA })$ and in (c) the range is $24\mathrm{eV}<\mathrm{KER}<27\mathrm{eV}$ $(R\approx 0.55\mathrm{\AA })$. (d), (e), and (f) show the double slit formula of Eq. (2) with $\beta =0.6$.Reuse & Permissions

Figure 3

(Color online) Interference pattern for different slices from Fig. 1d to determine its $k_e^{+}$ dependence. $k_e^{+}$ and $k_p^{-}$ are restricted as in Fig. 2. (a) shows the slice $1.6\mathrm{a.u.}<k_e^{+}<1.8\mathrm{a.u.}$, in (b) the range of $k_e^{+}$ is: $2.4\mathrm{a.u.}<k_e^{+}<2.8\mathrm{a.u.}$ and in (c) the limitation of $k_e^{+}$ is: $3.7\mathrm{a.u.}<k_e^{+}<4\mathrm{a.u.}$. The solid line is a guide to the eye. Panels (d)–(f) show the results of Eq. (2) for $\beta =0.8$.Reuse & Permissions