Low-energy negative-ion states of NO at high electron energy resolution

Randell, J; Lunt, S. L.; Mrotzek, G; Field, D.; Ziesel, J. P.

doi:10.1016/0009-2614(96)00135-2

Cited by 16 publications

(22 citation statements)

References 18 publications

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“…[12]), whereas the 1 ∆ and 1 Σ + anion curves lie below the previous curves by ∼ 0.24 and 0.26 eV, respectively. These new results give a 1 ∆ curve that is in better agreement with the semi-empirical result obtained by Teillet-Billy and F. Fiquet-Fayard [21], while the new results for the 1 Σ + state are consistent with experimental findings of Randell et al [6].…”

Section: Calculations and Resultssupporting

confidence: 91%

“…The calculated elastic cross sections show little structure above 1.5 eV, while Allan's measurements show weak structure out to 2.0 eV. Both Allan and Randell et al [6] have suggested that the 1 Σ + resonance may be responsible for structure above 1.5 eV, but our calculations predict the width of this state to be too large to give any boomerang structure.…”

Section: A Elastic Scattering and Vibrational Excitationcontrasting

confidence: 67%

“…NO is also used as a plasma gas and plays important functional roles in a variety of physiological systems. Although there have been a number of experimental studies on the low-energy behavior of the electron-NO collision cross sections [1][2][3][4][5][6][7][8][9], relatively little has been done on the theoretical front [10,11], particularly in the energy region below 2 eV, which is dominated by negative ion resonances. Calculations in this energy range were initiated in our previous study (Zhang et al [12]), which presented ab initio determinations of elastic and vibrational excitation cross sections using the local complex potential or "boomerang" model, with resonance parameters extracted from electronic fixed-nuclei variational scattering calculations.…”

Section: Introductionmentioning

confidence: 99%

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Nonlocal model of dissociative electron attachment and vibrational excitation of NO

et al. 2005

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We present the results of an ab initio study of elastic scattering and vibrational excitation of NO by electron impact in the low-energy (0-2 eV) region where the cross sections are dominated by resonance contributions. The 3 Σ − , 1 ∆ and 1 Σ + NO − resonance lifetimes are taken from our earlier study [Phys. Rev. A 69, 062711 (2004)], but the resonance energies used here are obtained from new configuration-interaction studies. Here we employ a more elaborate nonlocal treatment of the nuclear dynamics, which is found to remedy the principal deficiences of the local complex potential model we employed in our earlier study, and gives cross sections in better agreement with the most recent experiments. We also present cross sections for dissociative electron attachment to NO leading to ground state products, O − ( 2 P) + N( 4 S). The calculations show that, while the peak cross sections starting from NO in its ground vibrational state are very small (∼ 10 −20 cm 2 ), the cross sections are extremely sensitive to vibrational excitation of the target and should be readily observable for target NO molecules excited to ν = 10 and above.

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Section: Calculations and Resultssupporting

confidence: 91%

Section: A Elastic Scattering and Vibrational Excitationcontrasting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

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Nonlocal model of dissociative electron attachment and vibrational excitation of NO

et al. 2005

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“…To begin with, we note that the first ionization potential of NO at 9.26 eV (Collin and Natalis, 1968) involves removing the lone 2 electron, corresponding to the 1 g of N 2 . This can be contrasted with the gain of adding a single electron to the same single-particle level of virtually 0 eV (Alle et al, 1996;Randell et al, 1996), for a difference of over 9 eV, which can be identified as the electron-electron correlation energy U (Hü fner, 1996, p. 178) for this orbital. A primary source of external screening to describe the stabilization of the so-called ''affinity level'' to E F , where we observe it via autoionization, is the substrate image charge.…”

Section: Core-excited N 2 ϭN''o'' On Metallic Kmentioning

confidence: 99%

Charge-transfer dynamics studied using resonant core spectroscopies

2002

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The authors review the use of core-level resonant photoemission and resonant Auger spectroscopy to study femtosecond charge-transfer dynamics. Starting from simple models of the relevant processes, they examine the rationale for this approach and illustrate the approximations and known subtleties for the inexperienced experimentalist. Detailed analysis of case studies of increasing complexity are taken up, as well as the connection to related approaches using both valence excitation and the core-level fluorescent channel.

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“…Total integral cross sections have been measured by the time-of-flight method by Alle et al [14] and Buckman et al [15]. Randell et al [16] studied the resonances at low energies in NO cooled by supersonic expansion. Josić et al [17] derived vibrational cross sections from swarm parameters.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Microstructures in Nanocrystalline VN Barrier Leading to Failure in Cu/VN/SiO₂/Si Systems

Takeyama¹,

Itoi²,

Noya³

2010

Jpn. J. Appl. Phys.

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Absolute differential elastic and vibrational excitation cross sections have been measured for NO at 135 • with resolution of the 2 1/2 and 2 3/2 spin-orbit components of the ground electronic term. The electronic fine structure excitation is dominated by the 3 − and the 1 resonances of NO − ; the nonresonant contribution is very small. The cross section is very large; it has about the same magnitude as the resonant part of the elastic cross section. The magnitudes and shapes of the vibrational cross sections are essentially independent of whether the electronic fine structure transition is simultaneously excited or not. The vibrational cross sections have structures with interesting irregular shapes. Relative cross sections have been also measured at 180 • and show differences in intensities of the resonant structures above 1.6 eV.

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Low-energy negative-ion states of NO at high electron energy resolution

Cited by 16 publications

References 18 publications

Nonlocal model of dissociative electron attachment and vibrational excitation of NO

Nonlocal model of dissociative electron attachment and vibrational excitation of NO

Charge-transfer dynamics studied using resonant core spectroscopies

Evolution of Microstructures in Nanocrystalline VN Barrier Leading to Failure in Cu/VN/SiO₂/Si Systems

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Low-energy negative-ion states of NO at high electron energy resolution

Cited by 16 publications

References 18 publications

Nonlocal model of dissociative electron attachment and vibrational excitation of NO

Nonlocal model of dissociative electron attachment and vibrational excitation of NO

Charge-transfer dynamics studied using resonant core spectroscopies

Evolution of Microstructures in Nanocrystalline VN Barrier Leading to Failure in Cu/VN/SiO2/Si Systems

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Product

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Evolution of Microstructures in Nanocrystalline VN Barrier Leading to Failure in Cu/VN/SiO₂/Si Systems