Revised and extended analysis of the fifth spectrum of bromine: Br V

Abstract

The spectrum of four-times ionized bromine (Br V) has been investigated in the 350–1850 Å wavelength region, which was recorded on a 3-m normal incidence spectrograph at the Antigonish laboratory using a triggered spark light source and on a 6.65-m grazing incidence spectrograph at the Zeeman laboratory in Amsterdam using a sliding spark source. We have studied the 4s2 (4p+5p+6p+4f)+4p3+4s4p4d+4s4p5s configurations in the odd parity system and the 4s4p2, 4s2 (4d+5d+5s+6s+7s) configurations in the even parity system. Relativistic Hartree–Fock (HFR) and least squares fitted (LSF) parametric calculations were carried out to interpret the observed spectrum. Fifty-eight Br V levels have now been established, out of which 48 are new levels. Two hundred and sixteen spectral lines have been classified in this spectrum, out of which 202 are newly classified lines. A revised value of the ionization potential has been determined to be 480 670±200 cm−1 (59.60±0.02 eV).