Laser resonance ionization in a glow discharge

Hess, Kenneth R.; Harrison, W. W.

doi:10.1021/ac00121a021

Cited by 27 publications

(8 citation statements)

References 27 publications

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“…state) of the Fe atoms either were not produced or were quenched en route to the cell center. These results are quite different from the resonant ionization lines observed in a glow discharge (37), where numerous examples of excitation from the higher excited states were observed. Figure 3 shows the Fe+ signal produced by 302.1-nm resonant, two-photon ionization as a function of the velocity the neutral iron atoms would achieve if desorbed from the surface during the desorption laser beam pulse.…”

Section: Resultscontrasting

confidence: 99%

Multiphoton ionization of laser-desorbed neutral molecules in a Fourier transform ion cyclotron resonance mass spectrometer

Zimmerman¹,

Watson²,

Eyler³

1991

Anal. Chem.

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Resonant multiphoton Ionization of laser-desorbed nonvolatile samples has been achieved in a Fourier transform Ion cyclotron resonance (FTICR) mass spectrometer. The detection of Iron at the 100 ppm (parts per million) doping level In an InP compound semiconductor sample and the production of molecular Ions for a hexapeptlde have been observed in a modified FTICR analyzer cell. A unique three-laser experiment has been devised In which infrared multiphoton dissociation of dipeptlde ions, formed by resonant multiphoton ionization of laser-desorbed neutrals, Is performed.

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Section: Resultscontrasting

confidence: 99%

Multiphoton ionization of laser-desorbed neutral molecules in a Fourier transform ion cyclotron resonance mass spectrometer

Zimmerman¹,

Watson²,

Eyler³

1991

Anal. Chem.

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“…The excimer (Lumonics TE-860-4, Ontario, Canada) pumped dye laser (Lumonics EPD-330) has been described previously [1]. The maximum repetition rate is specified to be 150 Hz.…”

Section: Methodsmentioning

confidence: 99%

The laser as an analytical probe in glow discharge mass spectrometry

Barshick

Harrison

1989

Mikrochim Acta

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A pulsed dye laser was used alone and in combination with an auxiliary glow discharge for diagnostic studies. We have compared the mass ablation rate and ion signal in high vacuum and in the presence of an ambient buffer gas. Laser pulse energy and repetition rate were studied over the analytical range of the system. The effect of ambient gas pressure on redeposition was determined for three different gases: helium, neon, and argon. The laser/auxiliary discharge system was also shown to have analytical utility for the analysis of nonconducting samples. Spectra are included to illustrate the enhancement of the laser atomization/discharge ionization scheme over laser atomization/ionization.

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“…In this manner, a very selective probing of a glow discharge plasma with a tunable laser permits the analysis of individual elements, with virtually no background to contend with. Of course, the joining of a laser to the process detracts from the experimental simplicity of a glow discharge method, with the result that these experiments have arisen only in research laboratories [9,10] to date.…”

Section: Role Of the Glow Dischargementioning

confidence: 99%

“…The subsequent release of energy permits atomic emission measurements, which is the basis for a widely employed technique of glow discharge elemental analysis [9][10][11][12]. Again, the relatively low source background aids in achieving favorable detection limits.…”

Section: Photonsmentioning

confidence: 99%