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Green bands of the CsHg molecule (CROSBI ID 80996)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Polly, Robert ; Dinev, Stojan ; Windholz, Laurentius ; Milošević, Slobodan ; Hess, Bernd A. Green bands of the CsHg molecule // The Journal of chemical physics, 110 (1999), 18; 8992-8999

Podaci o odgovornosti

Polly, Robert ; Dinev, Stojan ; Windholz, Laurentius ; Milošević, Slobodan ; Hess, Bernd A.

engleski

Green bands of the CsHg molecule

We report the first observation of laser-induced fluorescence of the CsHg molecule. QTR{;group};{;Cs/Hg}; vapor mixtures contained in a heat-pipe oven were excited by several different argon ion laser lines. Following these excitations, we observed three distinct peaks at $lambda =492.8$ nm, $lambda =498.3$ nm, $lambda =521.5$ nm in addition to the well-known fluorescence of the QTR{;group};{;Cs};$_{;2};$ molecule. Based on an analysis using QTR{;it};{;ab initio}; potential energy curves of QTR{;group};{;Cs};$_{;2};$ and QTR{;group};{;CsHg}; we identified the origin of these three distinct peaks as bound--free transitions of QTR{;group};{;CsHg}; ($lambda =492.8$ nm: $IV_{;3/2}; ightarrow X_{;1/2};$, $lambda =498.3$ nm: $VII_{;1/2}; ightarrow X_{;1/2};$ and $lambda =521.5$ nm: $VI_{;1/2}; ightarrow X_{;1/2};$). Furthermore, we could show that two different production channels are responsible for the formation of the QTR{;group};{;CsHg}; molecules in the excited states. The excitation of the QTR{;group};{;Cs/Hg}; vapor mixtures with wavelengths $lambda _{;QTR{;rm};{;exc};};=476$--$514$ nm of the argon ion laser results in the production of the QTR{;group};{;CsHg}; molecules via a photoassociation process, whereas the CsHg molecules are produced in a three-body collision following an excitation with $lambda _{;QTR{;rm};{;exc};};=457$ nm. These results are confirmed by subsequent quantum mechanical simulations of the observed laser-induced fluorescence spectra of QTR{;group};{;CsHg};.

intermetallic excimers; CsHg; diffuse bands

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Podaci o izdanju

110 (18)

1999.

8992-8999

objavljeno

0021-9606

Povezanost rada

Fizika

Indeksiranost