Electron impact ionization and cationic fragmentation of the pyridazine molecules

Dampc, Marcin; Możejko, Paweł; Zubek, Mariusz

doi:10.1140/epjd/e2018-90474-2

Cited by 5 publications

(8 citation statements)

References 44 publications

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“…with the CSP-ic results for the pyridazine molecule along with the comparison available [20]. For other molecules in this work, present CSP-ic results along with the computed BEB cross-sections are given in figures 3-8.…”

Section: Resultsmentioning

confidence: 98%

“…A literature survey reveals that there is only one article available which reports the ionisation cross-section for the pyridazine molecule. Dampc et al [20] experimentally detected the ionisation cross-section from threshold to 140 eV. They also computed the binary encounter-Bethe (BEB) cross-sections over an energy range of threshold to 4000 eV.…”

Section: Introductionmentioning

confidence: 99%

“…The complex scattering potential-ionisation contribution (CSP-ic) [24] and binary encounter-Bethe (BEB) method [25] are applied to calculate the total ionisation crosssection from the ionisation threshold of the target to 5000 eV. In the case of pyridazine only CSP-ic results are reported as experimental cross-sections are available through the previous work of Dampc et al [20]. Moreover, these two methods are among the most popular theoretical techniques to study the ionisation processes.…”

Section: Introductionmentioning

confidence: 99%

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Electron impact ionisation cross-sections for complex molecules

Sinha

Gupta

Antony

2019

J. Phys. B: At. Mol. Opt. Phys.

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The main goal of this work is to compute the total ionisation cross-section for electron scattering from various complex molecules. The targets chosen are pyridazine, alanine, glycine, benzoic acid, phenylacetylene, ethylbenzene and n-propylbenzene. There is no previous literature available for these molecules except for pyridazine, alanine and glycine, and hence we present the first report of their ionisation cross-section. We apply the complex scattering potentialionisation contribution (CSP-ic) method to compute the cross-sections from the respective ionisation threshold to 5000 eV. The result for the pyridazine molecule shows an excellent agreement with the available experimental data and binary encounter-Bethe (BEB) crosssections. In the absence of any experimental comparison for other molecules, we have also calculated their BEB ionisation cross-sections. These two methods are well known for giving reasonable estimates of the ionisation cross-sections. The CSP-ic method is based on the molecular structure and properties, while the BEB method deals with molecular orbitals. Thus, comparing the two results will check the accuracy of these theoretical models and further increase the credibility of the reported cross-section. In general, fairly good agreement is observed between the two results. However, any inconsistencies observed are backed by valid reasons.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electron impact ionisation cross-sections for complex molecules

Sinha

Gupta

Antony

2019

J. Phys. B: At. Mol. Opt. Phys.

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“…Dampc and co-workers [ 10 ] used an electron-impact mass spectroscopy to investigate ionization and cationic fragmentation of the pyridazine (1,2 diazine), C H N , molecules in the gas phase. The mass spectra were measured, and the observed mass peaks were assigned to the corresponding cations.…”

Section: Experimental Advances In Electron and Ion Impact Processesmentioning

confidence: 99%

Topical Issue on many particle spectroscopy of atoms, molecules, clusters and surfaces editorial

et al. 2021

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Many particle spectroscopy is a subject of continued interest to many experimental and theoretical groups worldwide. It is based on the coincidence spectroscopy of minimum two particles coming from the same elementary process. It is a very powerful tool for studying not just atoms and molecules but also more extended electronic systems such as clusters and surfaces. Due to the large variety of its applications, it is really an interdisciplinary research field. This Topical Issue presents a state-of-the-art description of current research activities in the field of many particle spectroscopy. The contributions to this Issue represent original research results on both experimental and theoretical studies, involving the interaction of various projectiles, like photons, electrons, ions with atoms, molecules, clusters and surfaces.

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“…Processes occurring in polyatomic organic molecules at their interaction with slow electrons are of considerable interest not only for quantum theory of scattering and theory of electronic structure of molecules but also for solving a number of applied problems [1][2][3]. One of the most important elementary processes occurring in molecules when they interact with slow electrons is the process of excitation, which leads to the emission of spectral bands by both the whole molecules and their fragments.…”

Section: Introductionmentioning

confidence: 99%

Excitation of L-valine molecules by electrons and photons

et al. 2022

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Graphical abstract Excitation of L-valine molecules was studied by optical spectroscopy. Optical emission spectra of the L-valine molecule and optical excitation functions of molecular bands and the H β spectral line were measured in the gas phase using electron impact. In the spectra of optical emission in the wavelength range of 250–500 nm, intense emission bands were found at energies of incident electrons of 30, 50 and 70 eV. Analysis of structural features of the valine molecule suggested a fragmentation scheme with the formation of excited particles in collisions with electrons. A notable feature of the presented optical excitation functions is a different growth dynamics with an increase in the energy of exciting electrons and the presence of a number of features and kinks, which are especially pronounced for λ = 305 nm and λ = 311 nm. The excitation thresholds were determined from the initial sections of the excitation functions of the most intense spectral lines by the least-squares method. The photoluminescence spectra of L-valine were measured for the first time on a Shimadzu RF-6000 spectrofluorophotometer in the spectral range of 400–800 nm for excitation wavelengths of 250, 275, 333, 351, and 380 nm.

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Electron impact ionization and cationic fragmentation of the pyridazine molecules

Cited by 5 publications

References 44 publications

Electron impact ionisation cross-sections for complex molecules

Electron impact ionisation cross-sections for complex molecules

Topical Issue on many particle spectroscopy of atoms, molecules, clusters and surfaces editorial

Excitation of L-valine molecules by electrons and photons

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