1
|
Shapko D, Dohnal P, Kassayová M, Kálosi Á, Rednyk S, Roučka Š, Plašil R, Augustovičová LD, Johnsen R, Špirko V, Glosík J. Dissociative recombination of N 2H + ions with electrons in the temperature range of 80-350 K. J Chem Phys 2020; 152:024301. [PMID: 31941287 DOI: 10.1063/1.5128330] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Recombination of N2H+ ions with electrons was studied using a stationary afterglow with a cavity ring-down spectrometer. We probed in situ the time evolutions of number densities of different rotational and vibrational states of recombining N2H+ ions and determined the thermal recombination rate coefficients for N2H+ in the temperature range of 80-350 K. The newly calculated vibrational transition moments of N2H+ are used to explain the different values of recombination rate coefficients obtained in some of the previous studies. No statistically significant dependence of the measured recombination rate coefficient on the buffer gas number density was observed.
Collapse
Affiliation(s)
- Dmytro Shapko
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - Petr Dohnal
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - Miroslava Kassayová
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - Ábel Kálosi
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - Serhiy Rednyk
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - Štěpán Roučka
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - Radek Plašil
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| | - Lucie D Augustovičová
- Faculty of Mathematics and Physics, Department of Chemical Physics and Optics, Charles University, Prague, Czech Republic
| | - Rainer Johnsen
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
| | - Vladimír Špirko
- Faculty of Mathematics and Physics, Department of Chemical Physics and Optics, Charles University, Prague, Czech Republic
| | - Juraj Glosík
- Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, Prague, Czech Republic
| |
Collapse
|
2
|
Scrape PG, Chang CH, Nesbitt DJ. Suppressed-Doppler slit jet infrared spectroscopy of astrochemically relevant cations: ν1 and ν4 NH stretching modes in NH 3D +. J Chem Phys 2019; 151:084302. [DOI: 10.1063/1.5113962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Preston G. Scrape
- JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309, USA
| | - Chih-Hsuan Chang
- SpectraSensors, 4333 West Sam Houston Pkwy N., Houston, Texas 77043, USA
| | - David J. Nesbitt
- JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309, USA
- Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, USA
| |
Collapse
|
3
|
Wiens JP, Miller TM, Shuman NS, Viggiano AA. Dissociative recombination of HCl +, H 2Cl +, DCl +, and D 2Cl + in a flowing afterglow. J Chem Phys 2016; 145:244312. [PMID: 28049331 DOI: 10.1063/1.4972063] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Dissociative recombination of electrons with HCl+, H2Cl+, DCl+, and D2Cl+ has been measured under thermal conditions at 300, 400, and 500 K using a flowing afterglow-Langmuir probe apparatus. Measurements for HCl+ and DCl+ employed the variable electron and neutral density attachment mass spectrometry (VENDAMS) method, while those for H2Cl+ and D2Cl+ employed both VENDAMS and the more traditional technique of monitoring electron density as a function of reaction time. At 300 K, HCl+ and H2Cl+ recombine with kDR = 7.7±2.14.5 × 10-8 cm3 s-1 and 2.6 ± 0.8 × 10-7 cm3 s-1, respectively, whereas D2Cl+ is roughly half as fast as H2Cl+ with kDR = 1.1 ± 0.3 × 10-7 cm3 s-1 (2σ confidence intervals). DCl+ recombines with a rate coefficient below the approximate detection limit of the method (≲5 × 10-8 cm3 s-1) at all temperatures. Relatively slow dissociative recombination rates have been speculated to be responsible for the large HCl+ and H2Cl+ abundances in interstellar clouds compared to current astrochemical models, but our results imply that the discrepancy must originate elsewhere.
Collapse
Affiliation(s)
- Justin P Wiens
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, New Mexico 87117, USA
| | - Thomas M Miller
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, New Mexico 87117, USA
| | - Nicholas S Shuman
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, New Mexico 87117, USA
| | - Albert A Viggiano
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, New Mexico 87117, USA
| |
Collapse
|
4
|
Bones DL, Plane JMC, Feng W. Dissociative Recombination of FeO(+) with Electrons: Implications for Plasma Layers in the Ionosphere. J Phys Chem A 2016; 120:1369-76. [PMID: 26154158 DOI: 10.1021/acs.jpca.5b04947] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The dissociative recombination (DR) of FeO(+) ions with electrons has been studied in a flowing afterglow reactor. FeO(+) was generated by the pulsed laser ablation of a solid Fe target, and then entrained in an Ar(+) ion/electron plasma where the absolute electron density was measured using a Langmuir probe. A kinetic model describing gas-phase chemistry and diffusion to the reactor walls was fitted to the experimental data, yielding a DR rate coefficient at 298 K of k(FeO(+) + e(-)) = (5.5 ± 1.0) × 10(-7) cm(3) molecule(-1) s(-1), where the quoted uncertainty is at the 2σ level. Fe(+) ions in the lower thermosphere are oxidized by O3 to FeO(+), and this DR reaction is shown to provide a more important route for neutralizing Fe(+) below 110 km than the radiative/dielectronic recombination of Fe(+) with electrons. The experimental system was first validated by measuring two other DR reaction rate coefficients: k(O2(+) + e(-)) = (2.0 ± 0.4) × 10(-7) and k(N2O(+) + e(-)) = (3.3 ± 0.8) × 10(-7) cm(3) molecule(-1) s(-1), which are in good agreement with the recent literature.
Collapse
Affiliation(s)
- D L Bones
- School of Chemistry and ‡National Centre for Atmospheric Science, School of Earth and Environment, University of Leeds , Leeds LS2 9JT, U.K
| | - J M C Plane
- School of Chemistry and ‡National Centre for Atmospheric Science, School of Earth and Environment, University of Leeds , Leeds LS2 9JT, U.K
| | - W Feng
- School of Chemistry and ‡National Centre for Atmospheric Science, School of Earth and Environment, University of Leeds , Leeds LS2 9JT, U.K
| |
Collapse
|
5
|
Hejduk M, Dohnal P, Rubovič P, Kálosi Á, Plašil R, Johnsen R, Glosík J. Flowing-afterglow study of electron-ion recombination of para–H3+ and ortho–H3+ ions at temperatures from 60 K to 300 K. J Chem Phys 2015; 143:044303. [DOI: 10.1063/1.4927094] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Michal Hejduk
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University in Prague, Prague 18000, Czech Republic
| | - Petr Dohnal
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University in Prague, Prague 18000, Czech Republic
| | - Peter Rubovič
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University in Prague, Prague 18000, Czech Republic
| | - Ábel Kálosi
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University in Prague, Prague 18000, Czech Republic
| | - Radek Plašil
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University in Prague, Prague 18000, Czech Republic
| | - Rainer Johnsen
- Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
| | - Juraj Glosík
- Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University in Prague, Prague 18000, Czech Republic
| |
Collapse
|
6
|
Shuman NS, Hunton DE, Viggiano AA. Ambient and Modified Atmospheric Ion Chemistry: From Top to Bottom. Chem Rev 2015; 115:4542-70. [DOI: 10.1021/cr5003479] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicholas S. Shuman
- Air Force Research Laboratory,
Space Vehicles Directorate, Kirtland Air Force Base, Albuquerque, New Mexico 87117, United States
| | - Donald E. Hunton
- Air Force Research Laboratory,
Space Vehicles Directorate, Kirtland Air Force Base, Albuquerque, New Mexico 87117, United States
| | - Albert A. Viggiano
- Air Force Research Laboratory,
Space Vehicles Directorate, Kirtland Air Force Base, Albuquerque, New Mexico 87117, United States
| |
Collapse
|
7
|
Fournier JA, Shuman NS, Melko JJ, Ard SG, Viggiano AA. A novel technique for measurement of thermal rate constants and temperature dependences of dissociative recombination: CO2(+), CF3(+), N2O(+), C7H8(+), C7H7(+), C6H6(+), C6H5(+), C5H6(+), C4H4(+), and C3H3(+). J Chem Phys 2013; 138:154201. [PMID: 23614415 DOI: 10.1063/1.4801657] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A novel technique using a flowing afterglow-Langmuir probe apparatus for measurement of temperature dependences of rate constants for dissociative recombination (DR) is presented. Low (~10(11) cm(-3)) concentrations of a neutral precursor are added to a noble gas∕electron afterglow plasma thermalized at 300-500 K. Charge exchange yields one or many cation species, each of which may undergo DR. Relative ion concentrations are monitored at a fixed reaction time while the initial plasma density is varied between 10(9) and 10(10) cm(-3). Modeling of the decrease in concentration of each cation relative to the non-recombining noble gas cation yields the rate constant for DR. The technique is applied to several species (O2(+), CO2(+), CF3(+), N2O(+)) with previously determined 300 K values, showing excellent agreement. The measurements of those species are extended to 500 K, with good agreement to literature values where they exist. Measurements are also made for a range of CnHm(+) (C7H7(+), C7H8(+), C5H6(+), C4H4(+), C6H5(+), C3H3(+), and C6H6(+)) derived from benzene and toluene neutral precursors. CnHm(+) DR rate constants vary from 8-12 × 10(-7) cm(3) s(-1) at 300 K with temperature dependences of approximately T(-0.7). Where prior measurements exist these results are in agreement, with the exception of C3H3(+) where the present results disagree with a previously reported flat temperature dependence.
Collapse
Affiliation(s)
- Joseph A Fournier
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, New Mexico 87117, USA
| | | | | | | | | |
Collapse
|
8
|
Hunton DE, Viggiano AA, Morris RA, Paulson JF, Smith D, Adams NG. The O++ CO2reaction: New results and atmospheric implications. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/91ja01175] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
9
|
|
10
|
Sadeghi H, Schulz-Weiling M, Morrison JP, Yiu JCH, Saquet N, Rennick CJ, Grant E. Molecular ion-electron recombination in an expanding ultracold neutral plasma of NO+. Phys Chem Chem Phys 2011; 13:18872-9. [PMID: 21912784 DOI: 10.1039/c1cp22624j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using state-selected double-resonant excitation, we create a Rydberg gas of NO molecules excited to the principal quantum number n = 50 of the f-series converging to the ion rotational level, N(+) = 2. This gas evolves to form an ultracold plasma, which expands under the thermal pressure of its electrons, and dissipates by electron-ion recombination. Under conditions chosen for this experiment, the observed rates of expansion vary with selected plasma density. Electron temperatures derived from these expansion rates vary from T(e) = 12 K for the highest density up to 16 K at four-fold lower density. Over this range, the apparent electron coupling parameter, defined as Γ(e) = e(2)/4πε(0)ak(B)T(e), falls from nearly three to about one. The decay of charged-particle density fits with a kinetic model that includes parallel paths of direct two-body and stepwise three-body dissociative recombination. The overall recombinative decay follows a second-order rate law, with an observed rate constant that fits with established scattering-theory estimates for elementary two-body dissociative recombination. A small residual increase in this rate constant with decreasing charged-particle density suggests a growing importance of the three-body recombination channel under conditions of decreasing electron correlation.
Collapse
Affiliation(s)
- Hossein Sadeghi
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | | | | | | | | | | | | |
Collapse
|
11
|
Cipriani F, Leblanc F, Berthelier JJ. Martian corona: Nonthermal sources of hot heavy species. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006je002818] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
12
|
|
13
|
Ojekull J, Andersson PU, Någård MB, Pettersson JBC, Neau A, Rosén S, Thomas RD, Larsson M, Semaniak J, Osterdahl F, Danared H, Källberg A, Ugglas MA. Dissociative recombination of ammonia clusters studied by storage ring experiments. J Chem Phys 2006; 125:194306. [PMID: 17129102 DOI: 10.1063/1.2387174] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Dissociative recombination of ammonia cluster ions with free electrons has been studied at the heavy-ion storage ring CRYRING (Manne Siegbahn Laboratory, Stockholm University). The absolute cross sections for dissociative recombination of H+(NH3)2, H+(NH3)3, D+(ND3)2, and D+(ND3)3 in the collision energy range of 0.001-27 eV are reported, and thermal rate coefficients for the temperature interval from 10 to 1000 K are calculated from the experimental data and compared with earlier results. The fragmentation patterns for the two ions H+(NH3)2 and D+(ND3)2 show no clear isotope effect. Dissociative recombination of X+(NX3)2 (X=H or D) is dominated by the product channels 2NX3+X [0.95+/-0.02 for H+(NH3)2 and 1.00+/-0.02 for D+(ND3)2]. Dissociative recombination of D+(ND3)3 is dominated by the channels yielding three N-containing fragments (0.95+/-0.05).
Collapse
Affiliation(s)
- J Ojekull
- Department of Chemistry, Atmospheric Science, Göteborg University, SE-412 96 Göteborg, Sweden
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Fox JL, Yeager KE. Morphology of the near-terminator Martian ionosphere: A comparison of models and data. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2006ja011697] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
15
|
Biennier L, Alsayed-Ali M, Foutel-Richard A, Novotny O, Carles S, Rebrion-Rowe C, Rowe B. Laboratory measurements of the recombination of PAH ions with electrons: implications for the PAH charge state in interstellar clouds. Faraday Discuss 2006; 133:289-301; discussion 347-74, 449-52. [PMID: 17191453 DOI: 10.1039/b516858a] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Laboratory measurements of the recombination of polycyclic aromatic hydrocarbon (PAH) ions with electrons are presented. Experimental data have been obtained at room temperature for azulene (C10H8) and acenaphthene (C12H10) cations by the Flowing Afterglow with PhotoIons method. The results confirm that the recombination of PAH ions is fast although well below the geometrical limit. The set of our recent and present measurements reveal a definite trend of increasing rate with the number of carbon atoms of the PAH. This behaviour that needs further characterization is potentially of great interest for charge state models as recombination is a dominant mechanism of PAH ion destruction in the interstellar medium. The design of experiments to measure the recombination of larger PAHs and their temperature dependence is discussed.
Collapse
Affiliation(s)
- Ludovic Biennier
- Laboratoire de Physique des Atomes, Lasers, Molécules et Surfaces, UMR 6627 CNRS et Université de Rennes 1, France
| | | | | | | | | | | | | |
Collapse
|
16
|
McLain JL, Poterya V, Molek CD, Jackson DM, Babcock LM, Adams NG. C3H3+ Isomers: Temperature Dependencies of Production in the H3+ Reaction with Allene and Loss by Dissociative Recombination with Electrons. J Phys Chem A 2005; 109:5119-23. [PMID: 16833865 DOI: 10.1021/jp0444159] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A technique has been developed to simultaneously determine recombination rate coefficients, alpha e, and initial concentrations of ion types that coexist in a flowing afterglow plasma. This was tested using the H3(+) + allene reaction in which two different C3H3+ isomers are produced. Use of an electrostatic Langmuir probe enabled the C3H3+ isomer branching ratios for propargyl and cyclic C3H3+ from this allene reaction and their alpha e to be determined over the temperature range 172-489 K. The study showed that the cyclic C3H3+ to propargyl C3H3+ branching ratios from the allene reaction varied from 50/50 at 172 K to 18/82 at 489 K. Over this temperature range, the alpha e for both isomers change only slightly. The room temperature alpha e values for propargyl and cyclic C3H3+ are (1.15 +/- 0.2) x 10(-7) and (8.00 +/- 0.1) x 10(-7) cm3/s, respectively. The data are discussed relative to current theories and in relation to fuel-rich flame chemistry, interstellar molecular synthesis, and modeling of Titan's atmosphere.
Collapse
Affiliation(s)
- Jason L McLain
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, USA
| | | | | | | | | | | |
Collapse
|
17
|
Petrignani A, van der Zande WJ, Cosby PC, Hellberg F, Thomas RD, Larsson M. Vibrationally resolved rate coefficients and branching fractions in the dissociative recombination of O2+. J Chem Phys 2005; 122:14302. [PMID: 15638654 DOI: 10.1063/1.1825991] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have studied the dissociative recombination of the first three vibrational levels of O(2) (+) in its electronic ground X (2)Pi(g) state. Absolute rate coefficients, cross sections, quantum yields and branching fractions have been determined in a merged-beam experiment in the heavy-ion storage ring, CRYRING, employing fragment imaging for the reaction dynamics. We present the absolute total rate coefficients as function of collision energies up to 0.4 eV for five different vibrational populations of the ion beam, as well as the partial (vibrationally resolved) rate coefficients and the branching fractions near 0 eV collision energy for the vibrational levels v=0, 1, and 2. The vibrational populations used were produced in a modified electron impact ion source, which has been calibrated using Cs-O(2)(+) dissociative charge transfer reactions. The measurements indicate that at low collision energies, the total rate coefficient is weakly dependent on the vibrational excitation. The calculated thermal rate coefficient at 300 K decreases upon vibrational excitation. The partial rate coefficients as well as the partial branching fractions are found to be strongly dependent on the vibrational level. The partial rate coefficient is the fastest for v=0 and goes down by a factor of two or more for v=1 and 2. The O((1)S) quantum yield, linked to the green airglow, increases strongly upon increasing vibrational level. The effects of the dissociative recombination reactions and super elastic collisions on the vibrational populations are discussed.
Collapse
Affiliation(s)
- Annemieke Petrignani
- FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands.
| | | | | | | | | | | |
Collapse
|
18
|
McLain JL, Poterya V, Molek CD, Babcock LM, Adams NG. Flowing Afterglow Studies of the Temperature Dependencies for Dissociative Recombination of O2+, CH5+, C2H5+, and C6H7+ with Electrons. J Phys Chem A 2004. [DOI: 10.1021/jp040215l] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jason L. McLain
- Department of Chemistry, University of Georgia, Athens, Georgia 30602
| | - Viktoriya Poterya
- Department of Chemistry, University of Georgia, Athens, Georgia 30602
| | | | - Lucia M. Babcock
- Department of Chemistry, University of Georgia, Athens, Georgia 30602
| | - Nigel G. Adams
- Department of Chemistry, University of Georgia, Athens, Georgia 30602
| |
Collapse
|
19
|
Ojekull J, Andersson PU, Någård MB, Pettersson JBC, Derkatch AM, Neau A, Rosén S, Thomas R, Larsson M, Osterdahl F, Semaniak J, Danared H, Källberg A, af Ugglas M, Marković N. Dissociative recombination of NH4+ and ND4+ ions: Storage ring experiments andab initiomolecular dynamics. J Chem Phys 2004; 120:7391-9. [PMID: 15267649 DOI: 10.1063/1.1669388] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The dissociative recombination (DR) process of NH4+ and ND4+ molecular ions with free electrons has been studied at the heavy-ion storage ring CRYRING (Manne Siegbahn Laboratory, Stockholm University). The absolute cross sections for DR of NH4+ and ND4+ in the collision energy range 0.001-1 eV are reported, and thermal rate coefficients for the temperature interval from 10 to 2000 K are calculated from the experimental data. The absolute cross section for NH4+ agrees well with earlier work and is about a factor of 2 larger than the cross section for ND4+. The dissociative recombination of NH4+ is dominated by the product channels NH3+H (0.85+/-0.04) and NH2+2H (0.13+/-0.01), while the DR of ND4+ mainly results in ND3+D (0.94+/-0.03). Ab initio direct dynamics simulations, based on the assumption that the dissociation dynamics is governed by the neutral ground-state potential energy surface, suggest that the primary product formed in the DR process is NH3+H. The ejection of the H atom is direct and leaves the NH3 molecule highly vibrationally excited. A fraction of the excited ammonia molecules may subsequently undergo secondary fragmentation forming NH2+H. It is concluded that the model results are consistent with gross features of the experimental results, including the sensitivity of the branching ratio for the three-body channel NH2+2H to isotopic exchange.
Collapse
Affiliation(s)
- J Ojekull
- Department of Chemistry, Atmospheric Science, Göteborg University, SE-412 96 Göteborg, Sweden
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Sheehan CH. Dissociative recombination of N2+, O2+, and NO+: Rate coefficients for ground state and vibrationally excited ions. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2003ja010132] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
21
|
Van Doren JM, Miller TM, Williams S, Viggiano AA. Direct measurement of the thermal rate coefficient for electron attachment to ozone in the gas phase, 300-550 K: implications for the ionosphere. PHYSICAL REVIEW LETTERS 2003; 91:223201. [PMID: 14683234 DOI: 10.1103/physrevlett.91.223201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2003] [Indexed: 05/24/2023]
Abstract
Attachment of thermal electrons to O3 was studied in 133 Pa He between 300-550 K; the process is extremely inefficient. The rate coefficient increases sharply with temperature from 0.9 to 5 x 10(-11) cm(3) s(-1) (+/-30%) and comparison to kinetic energy measurements suggests internal energy can drive the reaction. These determinations account for competing processes of diffusion, recombination, and electron detachment reactions, and imply that no significant zero-energy resonance cross section exists, contradicting recent electron-beam results that call for substantial revision of ionospheric models.
Collapse
Affiliation(s)
- Jane M Van Doren
- Department of Chemistry, College of the Holy Cross, Worcester, MA 01610-2395, USA
| | | | | | | |
Collapse
|
22
|
Fox JL, Sung KY. Solar activity variations of the Venus thermosphere/ionosphere. ACTA ACUST UNITED AC 2001. [DOI: 10.1029/2001ja000069] [Citation(s) in RCA: 163] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
23
|
Hill SM, Solomon SC, Cleary DD, Broadfoot AL. Temperature dependence of the reaction N2(A3∑u+)+O in the terrestrial thermosphere. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/1999ja000395] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
24
|
Davidson DF, Hobson RM. The shock tube determination of the dissociative recombination rate of NO+. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/20/21/022] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
25
|
Alge E, Adams NG, Smith D. Rate coefficients for the attachment reactions of electrons with c-C7F14, CH3Br, CF3Br, CH2Br2and CH3I determined between 200 and 600K using the FALP technique. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/17/18/019] [Citation(s) in RCA: 97] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
26
|
Smith D, Adams NG. Studies of the reactions HBr(HI)+e to or from Br-(I-)+H using the FALP and SIFT techniques. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/20/18/026] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
27
|
Smith D, Adams NG, Alge E. Attachment coefficients for the reactions of electrons with CCl4, CCl3F, CCl2F2, CHCl3, Cl2and SF6determined between 200 and 600 K using the FALP technique. ACTA ACUST UNITED AC 1999. [DOI: 10.1088/0022-3700/17/3/015] [Citation(s) in RCA: 168] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
28
|
Swaminathan PK, Strobel DF, Kupperman DG, Kumar CK, Acton L, DeMajistre R, Yee JH, Paxton L, Anderson DE, Strickland DJ, Duff JW. Nitric oxide abundance in the mesosphere/lower thermosphere region: Roles of solar soft X rays, suprathermal N(4S) atoms, and vertical transport. ACTA ACUST UNITED AC 1998. [DOI: 10.1029/97ja03249] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
29
|
Fox JL, Hać A. Spectrum of hot O at the exobases of the terrestrial planets. ACTA ACUST UNITED AC 1997. [DOI: 10.1029/97ja02089] [Citation(s) in RCA: 77] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
30
|
Gougousi T, Johnsen R, Golde MF. Yield determination of OH(v=0,1) radicals produced by the electron-ion recombination of H3O+ ions. J Chem Phys 1997. [DOI: 10.1063/1.474586] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
31
|
Skrzypkowski M, Johnsen R. Electron-temperature dependence of the recombination of NH4+(NH3)n ions with electrons. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)00710-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
32
|
Gougousi T, Golde MF, Johnsen R. Electron-ion recombination rate coefficient measurements in a flowing afterglow plasma. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(96)01488-1] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
33
|
Semeter J, Mendillo M, Baumgardner J, Holt J, Hunton DE, Eccles V. A study of oxygen 6300 Å airglow production through chemical modification of the nighttime ionosphere. ACTA ACUST UNITED AC 1996. [DOI: 10.1029/96ja01485] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
34
|
Singhal RP. Electron density fluctuations in the nightside Venus ionosphere: Role of gravity waves. ACTA ACUST UNITED AC 1996. [DOI: 10.1029/95je03260] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
35
|
|
36
|
|
37
|
Zajfman D, Amitay Z. Measurement of the vibrational populations of molecular ions and its application to dissociative recombination in storage rings. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1995; 52:839-842. [PMID: 9912307 DOI: 10.1103/physreva.52.839] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
38
|
Reactions of H3O+ and OH− ions with some organic molecules; applications to trace gas analysis in air. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/0168-1176(95)04164-g] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
39
|
Swarm Techniques. ACTA ACUST UNITED AC 1995. [DOI: 10.1016/s0076-695x(08)60660-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
40
|
Johnsen R, Shun'ko EV, Gougousi T, Golde MF. Langmuir-probe measurements in flowing-afterglow plasmas. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1994; 50:3994-4004. [PMID: 9962456 DOI: 10.1103/physreve.50.3994] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
41
|
|
42
|
FALP studies of electron attachment at elevated electron temperatures: the influence of attachment on electron energy distributions. ACTA ACUST UNITED AC 1993. [DOI: 10.1016/0168-1176(93)87042-q] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
43
|
Smith D, Španěl P. Dissociative recombination of H3+ and some other interstellar ions: a controversy resolved. ACTA ACUST UNITED AC 1993. [DOI: 10.1016/0168-1176(93)87040-y] [Citation(s) in RCA: 93] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
44
|
Španěl P, Dittrichová L, Smith D. FALP studies of the dissociative recombination coefficients for O2+ and NO+ within the electron temperature range 300–2000 K. ACTA ACUST UNITED AC 1993. [DOI: 10.1016/0168-1176(93)87041-p] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
45
|
Fox JL. Dissociative Recombination in Planetary Ionospheres. ACTA ACUST UNITED AC 1993. [DOI: 10.1007/978-1-4615-2976-7_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
|
46
|
Buonsanto MJ, Solomon SC, Tobiska WK. Comparison of measured and modeled solar EUV flux and its effect on theE-F1region ionosphere. ACTA ACUST UNITED AC 1992. [DOI: 10.1029/92ja00792] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
47
|
Guberman SL, Giusti‐Suzor A. The generation of O(1S) from the dissociative recombination of O+2. J Chem Phys 1991. [DOI: 10.1063/1.460913] [Citation(s) in RCA: 110] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
48
|
Canosa A, Gomet JC, Rowe BR, Queffelec JL. Flowing Afterglow Langmuir Probe measurement of the N+2(v=0) dissociative recombination rate coefficient. J Chem Phys 1991. [DOI: 10.1063/1.460199] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
49
|
Adams NG, Herd CR, Geoghegan M, Smith D, Canosa A, Gomet JC, Rowe BR, Queffelec JL, Morlais M. Laser induced fluorescence and vacuum ultraviolet spectroscopic studies of H‐atom production in the dissociative recombination of some protonated ions. J Chem Phys 1991. [DOI: 10.1063/1.460570] [Citation(s) in RCA: 112] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
50
|
Sun H, Nakamura H. Theoretical study of the dissociative recombination of NO+ with slow electrons. J Chem Phys 1990. [DOI: 10.1063/1.458966] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|