Text this: Ionization cross sections of excitons due to scattering by excitons in semiconducting quantum well structures

 _    _      ___     ______     _____    _    _   
| |  | ||   / _ \\  |      \\  |  ___|| | \  / || 
| |/\| ||  | / \ || |  --  //  | ||__   |  \/  || 
|  /\  ||  | \_/ || |  --  \\  | ||__   | .  . || 
|_// \_||   \___//  |______//  |_____|| |_|\/|_|| 
`-`   `-`   `---`   `------`   `-----`  `-`  `-`