Observed enhanced fluorescence at 2177, 2163, 1923, and 1620 Å in C III by photoexcitation with Mn VI line radiation at 310 Å

Line radiation at 310.182 A from Mn VI ions in a laser produced plasma was used to resonantly pump C III ions in an adjacent, vacuum arc discharge from the 2s 1S ground level to the 4p1P0 upper level. Enhanced fluorescence by up to a factor of 150 was measured on the 4p 1P0–3d 1D line at 2177 A. Collisional exchanges between the n=4 levels transfer the pumped 4p population to the 4d and 4f levels. Enhanced fluorescence was also measured on the 4d 1D–3p 1P0 line at 1620 A and on the 4f–3d lines at 2163 A and 1923 A, respectively.