Esam Ali
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View article: Ultrafast Nonadiabatic Electron Relaxation Dynamics in Photoexcited C<sub>60</sub> Molecules
Ultrafast Nonadiabatic Electron Relaxation Dynamics in Photoexcited C<sub>60</sub> Molecules Open
Fullerene molecules, being attractive for fundamental research and key building blocks in materials of energy harvesting, are important for ultrafast electron transfer studies. The nonradiative electron-relaxation dynamics in a C60 molecul…
View article: Ultrafast nonadiabatic electron dynamics in photoexcited C60: A comparative study among DFT exchange-correlation functionals
Ultrafast nonadiabatic electron dynamics in photoexcited C60: A comparative study among DFT exchange-correlation functionals Open
The non-radiative electron-relaxation dynamics in C$_{60}$ molecule is studied after selective initial photoexcitations. The methodology includes nonadibabtic molecular simulation combined with time-dependent density functional theory (DFT…
View article: Radioactivity assessment of selected samples of foodstuffs in the local market
Radioactivity assessment of selected samples of foodstuffs in the local market Open
The research aims to evaluate the radioactivity of samples of foodstuffs Consumables in the local markets thirteen items were selected which are rice, tea, drinking water, lentils, chickpeas, flour, red bean, crushed chickpeas and milk pow…
View article: Triple-differential cross sections in three-dimensional kinematics for electron-impact-ionization dynamics of tetrahydrofuran at 250-eV projectile energy
Triple-differential cross sections in three-dimensional kinematics for electron-impact-ionization dynamics of tetrahydrofuran at 250-eV projectile energy Open
We report a combined experimental and theoretical study of the ionization dynamics of tetrahydrofuran induced by 250 eV electron impact in which the highest occupied molecular orbital is ionized leading to the stable parent ion. Experiment…
View article: Electron vacancy-level dependent hybrid photoionization of the F<sup>−</sup>@ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow> <mml:msub> <mml:mrow> <mml:mtext>C</mml:mtext> </mml:mrow> <mml:mrow> <mml:mn>60</mml:mn> </mml:mrow> </mml:msub> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> </mml:mrow> </mml:msup> </mml:math> molecule: a novel effect
Electron vacancy-level dependent hybrid photoionization of the F<sup>−</sup>@ molecule: a novel effect Open
Our previous studies (Shields et al 2020 J. Phys. B: At. Mol. Opt. Phys. 53 125101; Shields et al 2020 Euro. Phys. J. D 74 191) have predicted that the atom-fullerene hybrid photoionization properties for X = Cl, Br and I endohedrally conf…
View article: Absolute triple differential cross sections for low-energy electron impact ionization of biochemically relevant systems: Water, tetrahydrofuran, and hydrated tetrahydrofuran
Absolute triple differential cross sections for low-energy electron impact ionization of biochemically relevant systems: Water, tetrahydrofuran, and hydrated tetrahydrofuran Open
An experimental procedure is reported, which provides the absolute triple differential cross sections (ATDCSs) for electron-impact ionization of large (bio)molecules. This type of measurements represents the most stringent tests for new or…
View article: Electron vacancy-level dependent hybrid photoionization of F-@C60+ molecule
Electron vacancy-level dependent hybrid photoionization of F-@C60+ molecule Open
Our previous studies [J. Phys. B 53, 125101 (2020); Euro. Phys. J. D 74, 191 (2020)] have predicted that the atom-fullerene hybrid photoionization properties for X = Cl, Br and I endohedrally confined in C60 are different before and after …
View article: Molecular-frame (e, 2e) ionization dynamics of H2 at high impact-energy
Molecular-frame (e, 2e) ionization dynamics of H2 at high impact-energy Open
We report a combined experimental and theoretical study on the electron-impact ionization dynamics of H 2 at an impact-energy of 520 eV. The molecular-frame fivefold-differential cross sections were measured for electron emission in the pl…
View article: Fully differential study of ionization of H<sub>2</sub> by p impact near velocity matching
Fully differential study of ionization of H<sub>2</sub> by p impact near velocity matching Open
Synopsis Fully differential cross sections (FDCS) for ionization in p + H 2 collisions in the region of the electron-projectile velocity matching were measured and calculated. The FDCS were found to be very sensitive to the details of the …
View article: Target dependence of post-collision effects in ionization by proton impact
Target dependence of post-collision effects in ionization by proton impact Open
Synopsis Double differential cross sections (DDCS) for ionization in p + Ne, Ar collisions were measured and calculated for a broad range of projectile energy losses as a function of scattering angle. PCI effects in the DDCS were found to …
View article: Triple Differential Cross Sections for electron impact ionization of methane at intermediate energy
Triple Differential Cross Sections for electron impact ionization of methane at intermediate energy Open
Synopsis In a joint experimental and theoretical collaboration, triple differential cross sections are presented for electron-impact single ionization of the 1t 2 and 2a 1 states of CH 4 at an incident electron energy of 250 eV. Experiment…
View article: New structures in fully differential cross sections for ionization of He by proton impact
New structures in fully differential cross sections for ionization of He by proton impact Open
Synopsis Fully differential cross sections (FDCS) for ionization in p + He collisions were measured and calcu-lated for several projectile energy losses. The electron angular dependence of the FDCS reveals structures not seen in previous s…
View article: Triple differential cross sections for electron-impact ionization of methane at intermediate energy
Triple differential cross sections for electron-impact ionization of methane at intermediate energy Open
We report an experimental and theoretical investigation of electron-impact single ionization of the highest occupied molecular orbital 1t2 and the next highest occupied molecular orbital 2a1 states of CH4 at an incident electron energy of …
View article: Electron impact ionization dynamics of <i>para</i>-benzoquinone
Electron impact ionization dynamics of <i>para</i>-benzoquinone Open
Triple differential cross sections (TDCSs) for the electron impact ionization of the unresolved combination of the 4 highest occupied molecular orbitals (4b3g, 5b2u, 1b1g, and 2b3u) of para-benzoquinone are reported. These were obtained in…
View article: Experimental and theoretical triple-differential cross sections for tetrahydrofuran ionized by low-energy 26-eV-electron impact
Experimental and theoretical triple-differential cross sections for tetrahydrofuran ionized by low-energy 26-eV-electron impact Open
We report an experimental and theoretical study of low-energy electron-impact ionization of tetrahydrofuran, which is a molecule of biological interest. The experiments were performed using an advanced reaction microscope specially built f…