Collisional-radiative recombination of Ar<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mo>+</mml:mo></mml:msup></mml:math>ions with electrons in ambient helium at temperatures from 50 K to 100 K

Dohnal, Petr; Rubovič, Peter; Hejduk, Michal; Plašil, R.; Johnsen, Rainer; Glosı́k, J.

doi:10.1103/physreva.87.052716

Cited by 9 publications

(26 citation statements)

References 49 publications

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“…The validity of eq 2 at very low temperatures T e (down to 52 K) was recently verified for Ar + ions in a helium-buffered afterglow plasma in a Cryo-FALP II experiment (Kotrík et al, 27,42 Dohnal et al 38 ). Excellent agreement of experimental and theoretical values was obtained.…”

Section: Models Of Three-body Electron-ion Recombination Of H 3 + Andmentioning

confidence: 91%

Ternary Recombination of H₃⁺ and D₃⁺ with Electrons in He–H₂ (D₂) Plasmas at Temperatures from 50 to 300 K

et al. 2013

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We present results of plasma afterglow experiments on ternary electron-ion recombination rate coefficients of H3(+) and D3(+) ions at temperatures from 50 to 300 K and compare them to possible three-body reaction mechanisms. Resonant electron capture into H3* Rydberg states is likely to be the first step in the ternary recombination, rather than third-body-assisted capture. Subsequent interactions of the Rydberg molecules with ambient neutral and charged particles provide the rate-limiting step that completes the recombination. A semiquantitative model is proposed that reconciles several previously discrepant experimental observations. A rigorous treatment of the problem will require additional theoretical work and experimental investigations.

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Section: Models Of Three-body Electron-ion Recombination Of H 3 + Andmentioning

confidence: 91%

Ternary Recombination of H₃⁺ and D₃⁺ with Electrons in He–H₂ (D₂) Plasmas at Temperatures from 50 to 300 K

et al. 2013

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“…On the basis of our present and previous measurements of T Kin and T Rot−ortho we concluded that in both afterglow experiments we can use T Rot−ortho = T Kin = T He in rather good approximation (T He is temperature of helium buffer gas). From the measured diffusion losses during the afterglow and also from study of CRR of Ar + ions we can write T e = T He for electron 01002-p.5 temperature in good approximation again [14]. If we consider also measurements of p f 3 we can conclude that in plasmas containing n H 2 ions under study are kinetically and internally thermalized.…”

Section: Population Of Para-h + 3 and Ortho-h + 3 In Afterglow Plasmamentioning

confidence: 89%

“…6 we can see that eff is dependent on p f 3 and the dependence of K He on p f 3 is only very weak (nearly parallel lines). Statistical errors of measured data are within 5% but systematic error of the measurement itself is about 30%, see detailed discussion in [14]. From the parameters of the fit we obtain the corresponding binary bin ( n H 2 , 77 K) = (0.…”

Section: Measurements Of State Selected Recombination Rate Coefficienmentioning

confidence: 93%

“…The technical details were described elsewhere [14,20,25], only very short description will be given here. A source of parastate-enriched hydrogen gas (para-hydrogen generator) was also described in our previous publication [12].…”

Section: Methodsmentioning

confidence: 99%

“…One of the advantages of plasmatic environment is possibility to study ternary recombination processes assisted by neutrals, by electrons, or eventually by both of them, see Refs. [14][15][16][17] and references therein. In studies of binary recombination of H + 3 ions in He/Ar/H 2 gas mixture it was observed that the decay of afterglow plasma is dependent on He number density [5,6,[18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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State selective study of H₃⁺recombination in Cryo-FALP and SA-CRDS experiments at 77 K

Glosı́k

Hejduk

Dohnal

et al. 2015

EPJ Web of Conferences

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Abstract. Rate coefficients for nuclear spin state-specific recombination of H + 3 ions with thermal electrons were measured using FALP and SA techniques at temperatures 77-300 K. For this purpose H 2 gas with both thermal and enriched population of the para nuclear spin configuration was used. Measurements have shown that at 77 K para-H + 3 exhibits five times higher binary recombination rate coefficient than ortho-H + 3 : (1.5 ± 0.4) × 10 −7 vs. (3 ± 2) × 10 −8 cm 3 s −1 .

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Binary and ternary recombination of H₂D⁺ and HD₂⁺ ions with electrons at 80 K

Dohnal

Kálosi

Plašil

et al. 2016

Phys. Chem. Chem. Phys.

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The recombination of deuterated trihydrogen cations with electrons has been studied in afterglow plasmas containing mixtures of helium, argon, hydrogen and deuterium. By monitoring the fractional abundances of H3(+), H2D(+), HD2(+) and D3(+) as a function of the [D2]/[H2] ratio using infrared absorption observed in a cavity ring down absorption spectrometer (CRDS), it was possible to deduce effective recombination rate coefficients for H2D(+) and HD2(+) ions at a temperature of 80 K. From pressure dependences of the measured effective recombination rate coefficients the binary and the ternary recombination rate coefficients for both ions have been determined. The inferred binary and ternary recombination rate coefficients are: αbinH2D(80 K) = (7.1 ± 4.2) × 10(-8) cm(3) s(-1), αbinHD2(80 K) = (8.7 ± 2.5) × 10(-8) cm(3) s(-1), KH2D(80 K) = (1.1 ± 0.6) × 10(-25) cm(6) s(-1) and KHD2(80 K) = (1.5 ± 0.4) × 10(-25) cm(6) s(-1).

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Collisional-radiative recombination of Ar+ions with electrons in ambient helium at temperatures from 50 K to 100 K

Cited by 9 publications

References 49 publications

Ternary Recombination of H₃⁺ and D₃⁺ with Electrons in He–H₂ (D₂) Plasmas at Temperatures from 50 to 300 K

Ternary Recombination of H₃⁺ and D₃⁺ with Electrons in He–H₂ (D₂) Plasmas at Temperatures from 50 to 300 K

State selective study of H₃⁺recombination in Cryo-FALP and SA-CRDS experiments at 77 K

Binary and ternary recombination of H₂D⁺ and HD₂⁺ ions with electrons at 80 K

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Collisional-radiative recombination of Ar+ions with electrons in ambient helium at temperatures from 50 K to 100 K

Cited by 9 publications

References 49 publications

Ternary Recombination of H3+ and D3+ with Electrons in He–H2 (D2) Plasmas at Temperatures from 50 to 300 K

Ternary Recombination of H3+ and D3+ with Electrons in He–H2 (D2) Plasmas at Temperatures from 50 to 300 K

State selective study of H3+recombination in Cryo-FALP and SA-CRDS experiments at 77 K

Binary and ternary recombination of H2D+ and HD2+ ions with electrons at 80 K

Contact Info

Product

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Ternary Recombination of H₃⁺ and D₃⁺ with Electrons in He–H₂ (D₂) Plasmas at Temperatures from 50 to 300 K

Ternary Recombination of H₃⁺ and D₃⁺ with Electrons in He–H₂ (D₂) Plasmas at Temperatures from 50 to 300 K

State selective study of H₃⁺recombination in Cryo-FALP and SA-CRDS experiments at 77 K

Binary and ternary recombination of H₂D⁺ and HD₂⁺ ions with electrons at 80 K