Dielectronic structure of 2/-1s transitions of multicharged ions of argon with nuclear charges Z=10-17

A plasma of argon produced with a plasma focus discharge has been observed between 3.8 and 4.2 Angstrom. Spectra registered with a spectral resolution of 0.03 Angstrom/mm show satellite lines of Ar which were measured and com pared with two independent theoretical calculations. Seven transitions of L i-like, eleven of Be-like. twelve of B-like, twenty of C-like, nine of N-li ke, seven of O-like and two of F-like argon have been identified The agreem ent between the observations and the calculations and also between the two sets of calculations is generally good.