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The Regge-pole calculated low-energy electron elastic total cross sections (TCSs) for Cm and No, characterized generally by negative-ion formation, shape resonances and Ramsauer-Townsend(R-T) minima, exhibit atomic and fullerene molecular…

Atomic Physics · Physics 2019-10-01 Alfred Z. Msezane , Zineb Felfli

Dramatically sharp resonances manifesting stable negative-ion formation characterize Regge pole-calculated low-energy electron elastic total cross sections (TCSs) of heavy multi-electron systems. The novelty of the Regge pole analysis is in…

Atomic Physics · Physics 2022-12-29 Alfred Z. Msezane , Zineb Felfli

Regge-pole calculated low-energy electron elastic total cross sections (TCSs) for complex heavy atoms and fullerene molecules are characterized generally by ground, metastable, and excited negative-ion formation, shape resonances and…

Atomic and Molecular Clusters · Physics 2021-11-09 Zineb Felfli , Alfred Z. Msezane

The structure and dynamics of the actinide atoms from U to Lr is probed through the electron elastic scattering total cross sections (TCSs) calculated using Regge pole analysis. The crucial Regge trajectories probe electron attachment at…

Atomic Physics · Physics 2024-10-23 Zineb Felfli , Zoe Landers , Alfred Z. Msezane

Low-energy E < 2 eV electron elastic collisions with Ge, Sn and Pb atoms yield stable excited Ge-, Sn- and Pb- anions. The recent Regge-pole methodology is used with Thomas-Fermi type potential incorporating the crucial core-polarization…

Atomic Physics · Physics 2009-09-21 A. Z. Msezane , Z. Felfli , D. Sokolovski

A robust potential wherein is embedded the crucial core polarization interaction is used in the Regge Pole methodology to calculate low energy electron elastic scattering total cross section (TCS) for the C60 fullerene in the electron…

Atomic and Molecular Clusters · Physics 2017-03-02 Z. Felfli , A. Z. Msezane

Here we investigate ground and metastable negative ion formation in low-energy electron collisions with the actinide atoms Th, Pa, U, Np and Pu through the elastic total cross sections (TCSs) calculations. For these atoms, the presence of…

Atomic Physics · Physics 2018-11-09 Z. Felfli , A. Z. Msezane

The complex angular momentum (CAM) calculated low-energy 0 < E < 5 eV electron elastic total cross section (TCS) for In is benchmarked through its recently measured electron affinity (Walter et al, Phys. Rev. A 82, 032507 (2010)). The TCSs…

Atomic Physics · Physics 2011-08-30 A. Z. Msezane , Z. Felfli , D. Sokolovski

A novel method is proposed that uses very slow electron elastic collisions with atoms to identify their presence through the observation of tenuously bound (electron impact energy, E<0.1 eV) and weakly bound (E<1 eV) negative ions, formed…

Atomic Physics · Physics 2011-04-06 A. Z. Msezane , Z. Felfli , D. Sokolovski

In recent years, there has been growing interest in tetrafluoropropene HFO1234ze(E) (C$_{3}$H$_{2}$F$_{4}$) for Resistive Plate Chambers (RPCs). This novel gas is considered a promising alternative to the standard mixtures currently used in…

Plasma Physics · Physics 2024-03-12 Antonio Bianchi , Alessandro Ferretti , Martino Gagliardi , Ermanno Vercellin

A theoretical study of elastic electron collisions with 9 conformers of the gas-phase amino acid $\alpha$-alanine (CH$_3$CH(NH$_2$)COOH) is performed. The eigenphase sums, resonance features, differential and integral cross sections are…

Chemical Physics · Physics 2016-11-23 Milton M. Fujimoto , Erik V. R. de Lima , Jonathan Tennyson

We explore and contrast the capabilities of future colliders to probe the nature of the electro-weak phase transition. We focus on the real singlet scalar field extension of the Standard Model, representing the most minimal, yet most…

High Energy Physics - Phenomenology · Physics 2021-08-27 Andreas Papaefstathiou , Graham White

For the finite element simulation of thin soft biological tissues in dynamics, shell elements, compared to volume elements, can capture the whole tissue thickness at once, and feature larger critical time steps. However, the capabilities of…

Numerical Analysis · Mathematics 2018-01-15 Bahareh Momenan , Michel R. Labrosse

Low-energy collisions of Rydberg atom-ion systems are investigated theoretically. We present the parameter space associated with suitable approaches for the dynamics of Rydberg atom-ion collisions, i.e. quantum-, Langevin and classical…

Atomic Physics · Physics 2021-04-22 Henrik Hirzler , Jesús Pérez-Ríos

In a companion article (Part 1), we presented the development of a thick continuum-based (CB) shell finite element (FE) based on Mindlin-Reissner theory. We verified the accuracy, efficiency and locking insensitivity of the element in…

Numerical Analysis · Mathematics 2018-01-15 Bahareh Momenan , Michel R. Labrosse

We provide cross sections and Maxwell rate coefficients for reactive collisions of slow electrons with BeH$^+$ ions on all the eighteen vibrational levels ($X{^{1}\Sigma^{+}},v_{i}^{+}=0,1,2,\dots,17$) using a Multichannel Quantum Defect…

We report a detailed study of features of electron-impact excitation (EIE) of Ca IV for the first time using the relativistic Breit-Pauli R-Matrix method with a large close coupling wavefunction expansion of 54 fine structure levels…

Solar and Stellar Astrophysics · Physics 2023-04-05 Sultana Nahar , Bilal Shafique

Experiments on atoms in intense laser pulses and the corresponding exact ab initio solutions of the time-dependent Schr\"odinger equation (TDSE) yield photoelectron spectra with low-energy features that are not reproduced by the otherwise…

Atomic Physics · Physics 2017-11-21 Tian-Min Yan , S. V. Popruzhenko , M. J. J. Vrakking , D. Bauer

The study of molecular systems provides exceptional opportunities for the exploration of the fundamental laws of nature and for the search for physics beyond the Standard Model of particle physics. Measurements of molecules composed of…

A semi-classical model describing the charge transfer collisions of $C_{60}$ fullerene with different slow ions has been developed to explain available experimental data. This data reveals multiple Breit-Wigner like peaks in the cross…

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