Possible generation of a <em> γ</em>-ray laser by electrons wiggling in a background laser<xref ref-type="fn" rid="cpb142464fn1">*</xref>

Possible generation of a γ-ray laser by electrons wiggling in a background laser*

Zhang Qi-Ren†

The relation between and X ≡ θ / π , in the case of λ = 785 nm and I = 10¹⁹ W/m² for the laser, and energy E = 307 MeV for the incident electron.