✦ LIBER ✦

The 193 nm photolysis of phosphorus trichloride and phosphorus tribromide

✍ Scribed by M.J. Bramwell; S.E. Jaeger; J.C. Whitehead

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 415 KB
Volume: 196
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(92)85991-i

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✦ Synopsis

The creation of electronically excited species by the 193 nm excimer laser photolysis of PC& and PBr, has been studied. In addition to halogen and phosphorus atomic lines, emission is detected from highly excited states of Cl2 and Br2, respectively, formed by a two-photon process. We also observe previously unreported emission systems which we attribute to the A 'A, +x 'B, transitions of PClz and PBr2, which are formed by a single-photon process. The PC& and PBr2 A-+% emission spectra are broad and structureless, peaking at = 460 and 527 nm with short wavelength thresholds of x 370 and 5 10 nm, respectively. The A states of PC& and PBrz have long radiative lifetimes (29 ? 6 us and 2 1 ? 9 us, respectively) and are very efficiently quenched by PC& or PBr3.

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