Light WIMP Searches Involving Electron Scattering

Figure 5

The minimum required to eject an electron with binding energy in eV (a). The maximum outgoing electron energy as a function of for various binding energies (b). In this panel the graphs correspond to = 1, 2, 5, 10, 15, and 20 eV from left to right. For convenience we also show again the curve which corresponds to a free electron (long dashed). It yields the same maximum electron energy for = 20 eV and = 22.

(a)

(b)