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High-Pressure Study of Ion-Molecule Reactions in the Mixture of Carbon Tetrafluoride and Argon

100%

Bederski K.

Acta Physica Polonica A

2013

vol. 123

issue 5

896-898

Charge-exchange ion-molecule reactions of Ar^+ ions with CF_4 have been studied in the pressure range 1.33-39.99 Pa. A quadrupole mass spectrometer with a high-pressure ion source has been used for measuring gaseous ion-molecule reactions in the mixture of 1% CF_4 and 99% Ar. The fractional abundance I_i/∑ I_i of the observed CF_3^+, CF_2^+ and argon ions has been determined as a function of the gas mixture pressure (at the values of the repeller electrode potentials V_{R} ranging from 2 to 10 V).

Mass-Spectrometric Investigations of Silver Clusters

51%

Szymanska-Chargot M., Gruszecka A., Smolira A., Bederski K.

Acta Physica Polonica A

2011

vol. 120

issue 6

1012-1017

We report results of experimental studies on the silver clusters formation in laser desorption and matrix assisted laser desorption. Time-of-flight mass spectrometer was used to control process itself. Firstly, we investigated dependence of silver salts of variety chemical nature on formation of silver clusters. The most prominent was usage of organic silver salts (silver trifluoroacetate and silver benzoate). The biggest species obtained was Ag_{45}^{+} (silver benzoate). Secondly, we examined influence of organic matrix (2,5-dihydroxybenzoic acid) on formation efficiency of silver clusters in matrix assisted laser desorption. In all cases we observed increase of silver clusters size.

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2 Acta Physica Polonica A

1 2013

1 2011

2 Bederski K.

1 Gruszecka A.

1 Smolira A.

1 Szymanska-Chargot M.

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High-Pressure Study of Ion-Molecule Reactions in the Mixture of Carbon Tetrafluoride and Argon

Mass-Spectrometric Investigations of Silver Clusters