from w. demtröder “molecular physics”
DESCRIPTION
From W. Demtröder “Molecular Physics”. From W. Demtröder “Molecular Physics”. from Herzberg: Molecular Spectra & Molecular Structure. from W. Demtröder “Molecular Physics”. IR-UV Double Resonance. el. excited state. fluorescence. X, v=1. Technique: - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: From W. Demtröder “Molecular Physics”](https://reader035.vdocument.in/reader035/viewer/2022062500/568156f5550346895dc498cb/html5/thumbnails/1.jpg)
From W. Demtröder “Molecular Physics”
![Page 2: From W. Demtröder “Molecular Physics”](https://reader035.vdocument.in/reader035/viewer/2022062500/568156f5550346895dc498cb/html5/thumbnails/2.jpg)
From W. Demtröder “Molecular Physics”
![Page 3: From W. Demtröder “Molecular Physics”](https://reader035.vdocument.in/reader035/viewer/2022062500/568156f5550346895dc498cb/html5/thumbnails/3.jpg)
from Herzberg: Molecular Spectra & Molecular Structure
![Page 4: From W. Demtröder “Molecular Physics”](https://reader035.vdocument.in/reader035/viewer/2022062500/568156f5550346895dc498cb/html5/thumbnails/4.jpg)
![Page 5: From W. Demtröder “Molecular Physics”](https://reader035.vdocument.in/reader035/viewer/2022062500/568156f5550346895dc498cb/html5/thumbnails/5.jpg)
from W. Demtröder “Molecular Physics”
![Page 6: From W. Demtröder “Molecular Physics”](https://reader035.vdocument.in/reader035/viewer/2022062500/568156f5550346895dc498cb/html5/thumbnails/6.jpg)
IR-UV Double Resonance
X, v=0
el. excited state
X, v=1
fluorescence
Technique: Fix UV laser, scan IR laser, measure fluorescence signal as function of IR frequency to obtain vibrational spectrum of ground state
Advantage: • “Action spectroscopy” – probe generation of fluorescence photons, background-free, more sensitive than IR absorption
![Page 7: From W. Demtröder “Molecular Physics”](https://reader035.vdocument.in/reader035/viewer/2022062500/568156f5550346895dc498cb/html5/thumbnails/7.jpg)
Resonant Two-Photon Ionization (R2PI)
|0>
|k>
ionizationcontinuum
Technique: Scan laser, measure ion signal as function of laser frequency to obtain spectrum of excited state
Advantages: • Mass spectroscopic detection is very sensitive (much better than UV/vis absorption spectroscopy)• “Action spectroscopy” – probe generation of ions, background-free