Ss. Churilov et Yn. Joshi, Revised and extended analysis of eight-times ionized barium: BaIX and nine-times ionized barium: Ba X, PHYS SCR, 62(4), 2000, pp. 282-288
The spectra of barium were recorded in the 100 Angstrom-1250 Angstrom regio
n on a variety of normal and grazing incidence spectrographs. The sources u
sed were conventional triggered sparks and laser produced plasma. Eight-tim
es and nine-times ionized barium spectra (Ba IX and Ba X) were investigated
. In the Ba IX spectrum fifty-four levels were established out of which thi
rty-eight levels are new. One hundred and ten lines have been classified of
which 88 lines are new. Relativistic Hartree Fock (HFR) and least-squares-
fitted (LSF) calculations were carried out to interpret the spectrum satisf
actorily. In Ba X spectra twenty eight levels have been established out of
which ten are new levels. Thirty one lines are now classified in Ba X out o
f which eight lines are new.