ENERGY-LEVELS AND TRANSITION-PROBABILITIES IN DOUBLY-IONIZED ERBIUM (ER-III)

The spectrum of Er III reported by Becher (1966) was reanalysed with t he support of new predictions of energies and transition probabilities . The number of energy levels was increased from 45 to 115, including two levels of 4f(11)7s and the levels F-3(3), F-3(2) and (1)G(4) of th e ground configuration 4f(12). All 470 classified lines are reported w ith transition probabilities for most of them. Several of these lines had not yet been attributed to Er III in the spectrum of the star HR46 5.