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Spectroscopy DAPS

Disappearance potential spectroscopy DAPS The EAPFS cross-section is monitored by variations in the intensity of electrons elastically backscattered from the surface. Electronic structure... [Pg.4729]

Soft X-ray appearance potential spectroscopy (SXAPS) Disappearance potential spectroscopy (DAPS)... [Pg.4591]

Doppler-free two-photon spectroscopy spect A version of Doppler free spectroscopy in which the wavelength of a transition Induced by the simultaneous absorption of two photons is measured by placing a sample In the path of a laser beam reflected on itself, so that the Doppler shifts of the Incident and reflected beams cancel. dap-lor fre tu fO,tan spek tras-ka-pe j... [Pg.124]

Doppler spectroscopy spect A technique for measuring the speed with which an object is moving toward or away from the observer by measuring the amount that light from the object is shifted to a higher or lower frequency by the Doppler effect. dap-l3r spek tras-ko-pe)... [Pg.124]

D/A DAPS digital-to-analog disappearance potential spectroscopy... [Pg.127]

The dynamics of both static and dynamic quenching of the fluorescent singlet states of diazapyrenium salts by nucleotides has been investigated by Brun and Harriman using sub-nanosecond time-resolved transient absorption spectroscopy [88]. Observation of the reduced acceptor DAP+ (Table 5) supports an electron transfer mechanism for fluorescence quenching. Diffusion-controlled rate constants were observed for quenching of DAP + by all four deoxynucleotides. Excitation of... [Pg.1791]

Appearance potential spectroscopy involves detection of electronic transitions not of the backscattered electrons as in ELS, but of secondary processes. The latter include increase in soft X-ray (SXAPS) or Auger electron (AEAPS) emission or decrease in elastically scattered primary electrons (DAPS) (382). SXAPS is not as sensitive as AES for surface chemical analysis. However, SXAPS and IS spectra are easier to analyze than AES, since only one core transition is involved. This makes SXAPS and IS quite convenient for detecting heavy elements on catalyst surfaces. [Pg.308]

Appearance potential spectroscopies (SXAPS, AEAPS, DAPS, TCS, XEAPS, EAPFS, lETS)... [Pg.500]

TCS (Total (or target) current spectroscopy) is similar to DAPS, but it is a very low energy technique (0—15 eV) and all the secondary electrons originate from the valence band. [Pg.510]

Figure 1 A schematic diagram showing energy levels involved in techniques used to probe unoccupied density of states of a metai. XAS, X-ray absorption spectroscopy BIS, Bremsstrahlung isochromat spectroscopy I PE, inverse photoemission DAPS, disappearance potentiai spectroscopy SXAPS, soft X-ray appearance potentiai spectroscopy and AEAPS, Auger electron appearance potential spectroscopy. Figure 1 A schematic diagram showing energy levels involved in techniques used to probe unoccupied density of states of a metai. XAS, X-ray absorption spectroscopy BIS, Bremsstrahlung isochromat spectroscopy I PE, inverse photoemission DAPS, disappearance potentiai spectroscopy SXAPS, soft X-ray appearance potentiai spectroscopy and AEAPS, Auger electron appearance potential spectroscopy.
See other pages where Spectroscopy DAPS is mentioned: [Pg.275]    [Pg.32]    [Pg.248]    [Pg.521]    [Pg.275]    [Pg.32]    [Pg.248]    [Pg.521]    [Pg.4]    [Pg.7]    [Pg.228]    [Pg.342]    [Pg.124]    [Pg.257]    [Pg.139]    [Pg.234]    [Pg.128]    [Pg.1802]    [Pg.1806]    [Pg.1165]    [Pg.213]    [Pg.263]    [Pg.267]    [Pg.486]    [Pg.312]    [Pg.508]    [Pg.508]    [Pg.594]    [Pg.195]    [Pg.225]    [Pg.83]    [Pg.70]    [Pg.379]    [Pg.4627]   
See also in sourсe #XX -- [ Pg.275 ]



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Disappearance potential spectroscopy DAPS)

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