Insitudetection of BH2and atomic boron by intracavity laser spectroscopy in the plasma dissociation of gaseous B2H6

摘要

Absorption spectra of the BH2radical and atomic B are detected by intracavity laser spectroscopy (ILS)insituduring the plasma dissociation of gaseous diborane (B2H6). Rovibronic absorption transitions of BH2are observed near 15thinsp;469 cmminus;1lsqb;(0,11,0)2Brsquo;1ndash;(0,0,0)2Asquflg;1@Band 13thinsp;605 cmminus;1lsqb;(0,9,0)2Brsquo;1ndash;(0,0,0)2Asquflg;1@B. Absorption corresponding to the 3p(2P0)hyphen;5s(2S) transitions of atomic B are observed at 11thinsp;534.6 and 11thinsp;532.8 cmminus;1. Although atomic B has been detected previously under experimental conditions used in the plasmahyphen;assisted preparation of boronhyphen;containing films from B2H6, the ILS data presented here establish, for the first time, the presence of BH2under chemical vapor deposition conditions.