The Spectra of Neutral and Ionized Boron Hydride

Abstract

The spectrum of boron hydride, as excited in the cathode of a Schüler lamp, consists of at least three systems, ${}_{}{}^1{}_{}{}^{}\Pi \to {}_{}{}^1{}_{}{}^{}\Sigma$ of BH, ${}_{}{}^3{}_{}{}^{}\Sigma \to {}_{}{}^3{}_{}{}^{}\Pi$ of BH, and a new system, ${}_{}{}^2{}_{}{}^{}\Pi \to {}_{}{}^2{}_{}{}^{}\Sigma$, due to B${\mathrm{H}}^{+}$.