Experimental (e, 2e) study of state-to-state interference between autoionizing states of He

Paripás, Béla; Palásthy, B.; Pszota, Gábor

doi:10.1140/epjd/e2014-50635-y

Cited by 8 publications

(6 citation statements)

References 17 publications

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“…Our experimental setup consists of two cylindrical mirror (CMA) spectrometers on a common axis, both contains two "box" type analyzers [11,12] in series (see Fig. 2).…”

Section: Methodsmentioning

confidence: 99%

Classical Trajectory Monte Carlo simulation of coincidence experiments in electron impact ionization of helium

2019

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The state-to-state (exchange) interference of the autoionizing resonances of helium is studied in (e,2e) experiments. These studies are disturbed by the coincidence events caused by the direct ionization, so their decrease is desirable. For this reason, to mimic the experimental observation, we performed fourbody classical trajectory Monte Carlo calculations. The calculations were done for 93.15 eV primary energy, where the exchange interference of the 2s 2 (1 S) and 2p 2 (1 D) autoionizing states of helium is expected. The yields of non-coincidence and coincidence events detected in various combinations of scattering geometry were calculated and compared with the experimental observations.

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“…Our experimental setup consists of two cylindrical mirror (CMA) spectrometers on a common axis, both contains two "box" type analyzers [11,12] in series (see Fig. 2).…”

Section: Methodsmentioning

confidence: 99%

Classical Trajectory Monte Carlo simulation of coincidence experiments in electron impact ionization of helium

2019

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“…A méréseinkben az autoionizációs állapotot elektron lövedékkel keltettük, a két végállapoti elektront (szórt-ill. autoionizációs elektron) pedig két darab elektronspektrométerrel koincidenciában detektáltuk ((e,2e) mérések). Az első eredményeinket már publikáltuk [1,2], a publikációkban a nyers (számítógépes kiértékelést nem tartalmazó) spektrumokat és azok kombinációit szerepeltettük. A munkánk során nyilvánvalóvá vált, hogy az interferencia effektusokat pontosabban kimutathatnánk, ha (1) a spektrométereink a mérés során kisebb -de mérés közben változtatható -szögtartományt "látnának" (ellenkező esetben a nagy szögtartományban az interferencia effektusok kiátlagolódnak) és ha (2) elvégezzük a spektrumok számítógépes kiértékelését (ahogy azt régebben az Ar LMM Augerspektrumokkal is tettük).…”

Section: Bevezetésunclassified

A hélium autoionizációs spektrumainak szögfüggő felvétele és számítógépes kiértékelése

Paripás¹,

Palásthy²

2015

The Publications of the MultiScience - XXIX. MicroCAD International Scientific Conference

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The measuring (accepted) angular range of the double electron spectrometer of the Institute of Physics has been restricted in a rotatable manner. We have measured the electron spectra of the most important four autoionizing states of helium in four emission angular regions. The mathematical model of the autoionizing and scattered electron peaks of the spectra is shown in the paper. The Fano interference with the direct ionization background and energy spread of the primary electron beam have significant roles in this model.

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“…The theoretical papers from this topic addressed the problem of kinetics of electron ionisation processes as manifested in the shape of the cross sections for the hydrogen atom and the "quasi oneelectron" alkali atoms [6], triple differential cross sections of H 2 O [7] and the mechanism of ionisation reactions [8]. The group of experimental papers included mainly mass spectrometric studies of electron ionisation processes, including the measurement of the mass spectra and ion efficiency curves for electron ionisation and dissociative ionisation with an emphasis on the identification of the reaction products for molecules such as sorbitol [9], SF 6 [10], Tryptophan [11] and iron pentacarbonyl [12].…”

Section: Topics Coveredmentioning

confidence: 99%

Elementary processes with atoms and molecules in isolated and aggregated states

et al. 2015

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Abstract. This topical issue on "Elementary processes with atoms and molecules in isolated and aggregated states" was motivated by the 6th Conference on Elementary Processes in Atomic Systems -CEPAS, which was held from July 9-12, 2014 in Bratislava, Slovakia. The conference program overlaps with the topic of this issue. The scientific papers in the topical issue cover the fields of electron, positron, ion and photon interactions with atoms, molecules and surfaces.

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Experimental (e, 2e) study of state-to-state interference between autoionizing states of He

Cited by 8 publications

References 17 publications

Classical Trajectory Monte Carlo simulation of coincidence experiments in electron impact ionization of helium

Classical Trajectory Monte Carlo simulation of coincidence experiments in electron impact ionization of helium

A hélium autoionizációs spektrumainak szögfüggő felvétele és számítógépes kiértékelése

Elementary processes with atoms and molecules in isolated and aggregated states

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