Electron-impact excitation of the (
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Hamilton, Kathryn R.; Zatsarinny, Oleg; Bartschat, Klaus; Rabasović, Maja S.; Šević, D.; Marinković, B P; Dujko, Sasa; Atic, J; Fursa, Dmitry V.; Bray, Igor; McEachran, R P; Blanco, F.; Garcı́a, Gustavo; Stokes, Peter W.; White, R. D.; Brunger, M. J.

doi:10.1103/physreva.102.022801

Cited by 5 publications

(9 citation statements)

References 51 publications

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“…We have reported on experimental and theoretical DCS and ICS results for electron-impact excitation of the (4d 10 5s) 2 S1/2 → (4d 9 5s 2 ) 2 D3/2 and (4d 10 5s) 2 S1/2 → (4d 10 6s) 2 S1/2 transitions in silver, and in doing so we have extended the available cross-section database for this scattering system. Neither of those transitions are electric-dipole allowed, so that the corresponding measured scattering intensities were relatively low which in turn led to higher statistical uncertainties than were normally found to be the case [10,11,23]. Nonetheless, all our measured data were observed to be consistently reproducible, to within the stated one standard deviation uncertainties, so that we are confident in their validity.…”

Section: Discussionmentioning

confidence: 56%

“…3. Indeed this behavior appears to be ubiquitous in electron-metal-vapor scattering, for both the elastic and discrete inelastic channels, with a few examples supporting that assertion being bismuth [22], zinc [21], indium [23], sodium [54], and magnesium [55]. The oscillatory nature of any differential cross section arises from the interference between the various partial waves that describe the collisional behavior.…”

Section: Resultsmentioning

confidence: 89%

“…In all that time the correction to the value of E 0 read on the relevant voltage supply was never worse than ±0.1 eV. We therefore relied on the same calibration we employed in our recent work on indium [23] and we believe it to again be accurate to ±0.1 eV. Note that this is something of a moot point in this case as away from the effects of resonance behavior the cross section only varies very slowly with E 0 .…”

Section: Experimental Considerationsmentioning

confidence: 95%

“…1 for a typical example) were measured at each θ , before being analyzed. For many years we calibrated, often using a variety of resonance or Wignercusp features for the species in question (e.g., [21][22][23]), our incident electron beam energy. In all that time the correction to the value of E 0 read on the relevant voltage supply was never worse than ±0.1 eV.…”

Section: Experimental Considerationsmentioning

confidence: 99%

“…Note that our ratios normalization procedure is only valid if the analyser transmission remains constant across the energy-loss range 3.2-5.5 eV, at each E 0 . Our steps for ensuring this can be found, for example, in Hamilton et al [23]. We should further note that McNamara et al [12] raised queries as to the validity of the 5p 1/2,3/2 DCSs of Tošić et al [10,11].…”

Section: Experimental Considerationsmentioning

confidence: 99%

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Electron-impact excitation of the (4d105s)S1/22→

et al. 2021

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Section: Discussionmentioning

confidence: 56%

Section: Resultsmentioning

confidence: 89%

Section: Experimental Considerationsmentioning

confidence: 95%

Section: Experimental Considerationsmentioning

confidence: 99%

Section: Experimental Considerationsmentioning

confidence: 99%

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Electron-impact excitation of the (4d105s)S1/22→

et al. 2021

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Recommended Cross Sections for Electron–Indium Scattering

Hamilton

Zatsarinny

Bartschat

et al. 2021

Journal of Physical and Chemical Reference Data

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We report, over an extended energy range, recommended angle-integrated cross sections for elastic scattering, discrete inelastic scattering processes, and the total ionization cross section for electron scattering from atomic indium. In addition, from those angle-integrated cross sections, a grand total cross section is subsequently derived. To construct those recommended cross-section databases, results from original B-spline R-matrix, relativistic convergent close-coupling, and relativistic optical-potential computations are also presented here. Electron transport coefficients are subsequently calculated, using our recommended database, for reduced electric fields ranging from 0.01 Td to 10 000 Td using a multiterm solution of Boltzmann's equation. To facilitate those simulations, a recommended elastic momentum transfer cross-section set is also constructed and presented here.

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Transport of electrons and propagation of the negative ionisation fronts in indium vapour

Dujko¹,

Atic²,

Bošnjaković³

et al. 2021

Plasma Sources Sci. Technol.

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We study the transport of electrons and propagation of the negative ionisation fronts in indium vapour. Electron swarm transport properties are calculated using a Monte Carlo simulation technique over a wide range of reduced electric fields E/N (where E is the electric field and N is the gas number density) and indium vapour temperatures in hydrodynamic conditions, and under non-hydrodynamic conditions in an idealised steady-state Townsend (SST) setup. As many indium atoms are in the first ( 5 s 2 5 p ) 2 P 3 / 2 metastable state at vapour temperatures of a few thousand Kelvin, the initial Monte Carlo code was extended and generalized to consider the spatial relaxation and the transport of electrons in an idealised SST experiment, in the presence of thermal motion of the host-gas atoms and superelastic collisions. We observe a significant sensitivity of the spatial relaxation of the electrons on the indium vapour temperature and the initial conditions used to release electrons from the cathode into the space between the electrodes. The calculated electron transport coefficients are used as input for the classical fluid model, to investigate the inception and propagation of negative ionisation fronts in indium vapour at various E/N and vapour temperatures. We calculate the electron density, electric field, and velocity of ionisation fronts as a function of E/N and indium vapour temperature. The presence of indium atoms in the first ( 5 s 2 5 p ) 2 P 3 / 2 metastable state significantly affects the characteristics of the negative ionisation fronts. The transition from an avalanche into a negative ionisation front occurs faster with increasing indium vapour temperature, due to enhanced ionisation and more efficient production of electrons at higher vapour temperatures. For lower values of E/N, the electron density behind the streamer front, where the electric field is screened, does not decay as one might expect for atomic gases, but it could be increased due to the accumulation of low-energy electrons that are capable of initiating ionisation in the streamer interior.

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Electron-impact excitation of the ( 5s25p ) P1/22→

Abstract: Electron-impact excitation of the (5s25p) P1/2 2 →(5s26s) S1/2 2 Electron-impact excitation of the (5s25p) P1/2 2 (5s26s) S1/2 2 transition in indium: Theory and experiment transition in indium: Theory and experiment

Cited by 5 publications

References 51 publications

Electron-impact excitation of the (4d105s)S1/22→

Electron-impact excitation of the (4d105s)S1/22→

Recommended Cross Sections for Electron–Indium Scattering

Transport of electrons and propagation of the negative ionisation fronts in indium vapour

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