Accurate gaseous ion mobility measurements

Viehland, Larry A.; Lutfullaeva, Anbara; Dashdorj, J.; Johnsen, Rainer

doi:10.1007/s12127-017-0220-0

Cited by 9 publications

(7 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[48]; for more accurate results the E/n0 dependence must be included. These issues have been discussed in detail recently [49].…”

Section: (F) Transport Coefficientsmentioning

confidence: 99%

“…If only moderate accuracy is required, then the zero-field mobility can be used in analysing experiments below and near room temperature, but it is important to establish that one is working in the zero-field region, which can be estimated from an expression given in [45]; for more accurate results, the E/n 0 dependence must be included. These issues have been discussed in detail recently [46].…”

Section: (F) Transport Coefficientsmentioning

confidence: 99%

See 1 more Smart Citation

Interactions of C ⁺ ( ² P _J ) with rare gas atoms: incipient chemical interactions, potentials and transport coefficients

Tuttle

Thorington

Viehland

et al. 2018

Phil. Trans. R. Soc. A.

Self Cite

View full text Add to dashboard Cite

Accurate interatomic potentials were calculated for the interaction of a singly-charged carbon cation, C + , with a single rare gas atom, RG (RG = Ne-Xe). The RCCSD(T) method and basis sets of quadruple- and quintuple- quality were employed; each interaction energy is counterpoise corrected and extrapolated to the basis set limit. The lowest C + ( 2 P) electronic term of the carbon cation was considered, and the interatomic potentials calculated for the diatomic terms that arise from these: 2  and 2  + . Additionally, the interatomic potentials for the respective spin-orbit levels were calculated, and the effect on the spectroscopic parameters was examined. In doing this, anomalously large spin-orbit splittings for RG = Ar-Xe were found, and this was investigated using multireference configuration interaction (MRCI) calculations. The latter indicated a small amount of RG  C + electron transfer and this was able to rationalize the observations. This is taken as evidence of an incipient chemical interaction, which was also examined via contour plots, Birge-Sponer plots and various population analyses across the C + -RG series (RG = He-Xe), with the latter showing unexpected results. Trends in several spectroscopic parameters were examined as a function of the increasing atomic number of the RG atom. Finally, each set of RCCSD(T) potentials was employed including spin-orbit coupling to calculate transport coefficients for C + in RG, and the results compared to the limited available data.

show abstract

“…[48]; for more accurate results the E/n0 dependence must be included. These issues have been discussed in detail recently [49].…”

Section: (F) Transport Coefficientsmentioning

confidence: 99%

Section: (F) Transport Coefficientsmentioning

confidence: 99%

Interactions of C ⁺ ( ² P _J ) with rare gas atoms: incipient chemical interactions, potentials and transport coefficients

Tuttle

Thorington

Viehland

et al. 2018

Phil. Trans. R. Soc. A.

Self Cite

View full text Add to dashboard Cite

show abstract

“…[28][29][30] In these experiments, obtaining accurate ion mobility data for Si + in RG is important for determining non-chemical loss mechanisms, as the flow gases are usually rare gases, and the Ge + results herein will be of use in corresponding kinetics studies. Mobilities also determine the relative energy of ions in flow and drift tubes, 31 and so there are wider incentives for obtaining such data. 32 Molecular complexes are often described as being ''prereactive'' species and can be used to interrogate nascent interactions that occur prior to full chemical reaction.…”

Section: Introductionmentioning

confidence: 99%

Interactions of Si⁺(²P_J) and Ge⁺ (²P_J) with rare gas atoms (He–Rn): interaction potentials, spectroscopy, and ion transport coefficients

Davies

Cranney

Viehland

et al. 2022

Phys. Chem. Chem. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Electron multiplication bursts affect the production of various ions that can affect the time distribution of detected particles (Bošnjaković, 2016). The experimental transport coefficients required as input data for He + ion transport models in He are existing (Viehland et al, 2017;Basurto et al, 2000;Helm, 1977;Stefansson et al, 1988;Viehland & Mason, 1995). Only bulk values in CF 4 of transport coefficients can be experimentally determined (Robson, 1991).…”

Section: Introductionmentioning

confidence: 99%

“…The aim of this paper is to report on a topic important for both basic studies and application. We estimated the set of cross sections for He + in He/CF 4 using existing experimental data (Viehland et al, 2017;Basurto et al, 2000;Helm, 1977;Stefansson et al, 1988;Viehland & Mason, 1995). In the next section, we will discuss the compilation of existing data and establish one possible set of cross-sections.…”

Section: Introductionmentioning

confidence: 99%

Transport coefficients for He⁺ ions in mixtures He/CF₄: modeling laboratory and astrophysical plasmas

Nikitović¹,

Raspopović²

2022

caosp

View full text Add to dashboard Cite

A complete set of cross sections for helium ions in a mixture of helium and carbon tetrafluoride is recommended. The transport properties for He + ions in He/CF4 mixtures required to model the discharge containing the mentioned ions were calculated by the Monte Carlo method at a temperature of T = 300 K. In this paper we give the drift velocity, characteristic energy, reduced mobility and specially rate coefficients for low and moderately reduced electric fields E /N (E-electric field, N-gas density) and accounting for nonconservative collisions. This paper is dedicated to the presentation of the set for He + ions scattering cross-sections in CF4 which is estimated using available experimental data for exothermic charge transfer cross-sections producing CF + 3 and CF + 2 ions and endothermic charge transfer cross-section producing CF + , C + and F + ions. The aim of this paper is to determine how the addition of a percentage for He in He/CF4 mixtures affects the separation of bulk and flux transport parameters for He + ions.

show abstract

Accurate gaseous ion mobility measurements

Cited by 9 publications

References 25 publications

Interactions of C ⁺ ( ² P _J ) with rare gas atoms: incipient chemical interactions, potentials and transport coefficients

Interactions of C ⁺ ( ² P _J ) with rare gas atoms: incipient chemical interactions, potentials and transport coefficients

Interactions of Si⁺(²P_J) and Ge⁺ (²P_J) with rare gas atoms (He–Rn): interaction potentials, spectroscopy, and ion transport coefficients

Transport coefficients for He⁺ ions in mixtures He/CF₄: modeling laboratory and astrophysical plasmas

Contact Info

Product

Resources

About

Accurate gaseous ion mobility measurements

Cited by 9 publications

References 25 publications

Interactions of C + ( 2 P J ) with rare gas atoms: incipient chemical interactions, potentials and transport coefficients

Interactions of C + ( 2 P J ) with rare gas atoms: incipient chemical interactions, potentials and transport coefficients

Interactions of Si+(2PJ) and Ge+ (2PJ) with rare gas atoms (He–Rn): interaction potentials, spectroscopy, and ion transport coefficients

Transport coefficients for He+ ions in mixtures He/CF4: modeling laboratory and astrophysical plasmas

Contact Info

Product

Resources

About

Interactions of C ⁺ ( ² P _J ) with rare gas atoms: incipient chemical interactions, potentials and transport coefficients

Interactions of C ⁺ ( ² P _J ) with rare gas atoms: incipient chemical interactions, potentials and transport coefficients

Interactions of Si⁺(²P_J) and Ge⁺ (²P_J) with rare gas atoms (He–Rn): interaction potentials, spectroscopy, and ion transport coefficients

Transport coefficients for He⁺ ions in mixtures He/CF₄: modeling laboratory and astrophysical plasmas