Excited state, charge transfer absorption spectrym of HgBr in the blue (λ∼447 nm)

D. P. Greene, K. P. Killeen, J. G. Eden

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Absorption from the lowest-lying ion pair state of HgBr (i.e., Hg +-Br-:B 2Σ1/2+) has been observed by transient absorption spectroscopy in a pulsed, transverse discharge containing a mixture of Ne, N2, and HgBr2 vapor. A highly structured band peaking at ∼447 nm is shown to be associated with charge-transfer transitions from the B 2Σ1/2 + state to a higher-lying, covalently bonded (Hg*-Br) state. By pumping the 447 nm transition with a pulsed dye laser while simultaneously monitoring gain on the HgBr (B 2Σ1/2 +→X 2Σ1/2+) band at 502 nm, the absorption cross section for the blue band was measured to be (3.0±1.5)×10-17 cm2 and the saturation intensity for the transition at 447 nm was determined to be 710±50 kW cm-2.

Original languageEnglish (US)
Pages (from-to)3188-3193
Number of pages6
JournalThe Journal of Chemical Physics
Issue number6
StatePublished - Jan 1 1986


ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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