Chemiluminescent ion–molecule reactions B++H2

Abstract
Emission spectra resulting from impact of low‐energy (1–10 eVc.m.) B+ ions in a beam on an H2 target were measured. Numerous new bands of the BH+(A 2Π–X 2Σ+) transition were observed besides the previously known (0,0) and (1,1) bands. Also, at higher energy a new band system was discovered which is ascribed to the BH+(B2Σ+X 2Σ+) transition. It was identified by analogy with BeH and MgH. The results are discussed in terms of electronic state and molecular orbital correlation diagrams.