Effect of irradiation by He+ and Ga+ ions on the 2D-exciton susceptibility of InGaAs/GaAs quantum-well structures. - Kapitonov, Yu. V.; Shapochkin, P. Yu.; Petrov, Yu. V.; Efimov, Yu. P.; Eliseev, S. A.; Dolgikh, Yu. K.; Petrov, V. V.; Ovsyankin, V. V. (Physica Status Solidi (B), 2015)