New Lines in Isoelectronic Sequences of Argon I from V vi to Ni xi and in Isoelectronic Sequences of Potassium i from Cr vi to Cu xi

A method of differentiation between highly ionized spectra has enabled extension of the argon i isoelectronic sequences of the 3p54s and 3p5 5s levels. A sequence of 3p5(²P32)4d and 3p5(²P12)4d levels is established. The potassium i isoelectronic sequences of 3p63d–3p6nf transitions are also extended.Lines of the following ions are reported: V vi, Cr vi and vii, Mn viii, Fe viii and ix, Co ix and x, Ni x and xi, Cu xi.