Project supported by the National Natural Science Foundation of China (Grant Nos. 11174218 and 10674102);the Natural Science Foundation of Tianjin,China (Grant No. 05YFJMJC05200)
Spectra of autoionizing states of the Sm atom in an energy region between 45948.9 cm^-1 and 46943.6 cm^-1 are systematically investigated by a three-color multi-step resonant excitation scheme with three different exc...