Neon-like X-ray lasers of zirconium, niobium and bromine

The authors demonstrate three new X-ray lasers in neon-like zirconium, niobium and bromine which lase on 3p to 3s transitions. By observing the wavelengths and relative intensity of the lasing lines they hope to shred some light on the anomalous lasing in neon-like yttrium, where one laser line dominates the spectrum. In this work they report the wavelengths of five new lasing lines in bromine and six lasing lines each in zirconium and niobium.