Positron-molecule interactions: Resonant attachment, annihilation, and bound states

GF Gribakin, JA Young, CM Surko - Reviews of Modern Physics, 2010 - APS
This article presents an overview of current understanding of the interaction of low-energy
positrons with molecules with emphasis on resonances, positron attachment, and …

Many-Body Theory Calculations of Positron Scattering and Annihilation in , , and

CM Rawlins, J Hofierka, B Cunningham… - Physical Review Letters, 2023 - APS
The recently developed ab initio many-body theory of positron molecule binding [J. Hofierka,
Many-body theory of positron binding to polyatomic molecules, Nature (London) 606, 688 …

Positron Annihilation in Molecules by Capture into Vibrational Feshbach Resonances<? format?> of Infrared-Active Modes

GF Gribakin, CMR Lee - Physical review letters, 2006 - APS
Enhanced positron annihilation on polyatomic molecules is a long-standing and complex
problem. We report the results of calculations of resonant positron annihilation on methyl …

Model-potential calculations of positron binding, scattering, and annihilation for atoms and small molecules using a Gaussian basis

AR Swann, GF Gribakin - Physical Review A, 2020 - APS
A model-potential method is employed to calculate binding, elastic scattering, and
annihilation of positrons for a number of atoms and small nonpolar molecules, namely, Be …

Energy-resolved positron annihilation rates for molecules

LD Barnes, JA Young, CM Surko - Physical Review A—Atomic, Molecular, and …, 2006 - APS
The development of high resolution positron beams has enabled measurements of
annihilation rates for molecules as a function of incident positron energy. Vibrational …

Positron collisions with molecular hydrogen: cross sections and annihilation parameters calculated using the R-matrix with pseudo-states method

R Zhang, KL Baluja, J Franz… - Journal of Physics B …, 2011 - iopscience.iop.org
The molecular R-matrix with pseudo-states (MRMPS) method is employed to study positron
collisions with H 2. The calculations employ pseudo-continuum orbital sets containing up to …

Low Energy Positron Scattering by F and F2

W Tenfen, J de Souza Glória… - The Journal of Physical …, 2022 - ACS Publications
We have determined integral and differential elastic cross sections for positron scattering
with atomic F and F2 molecules from 0.01 to 1000 eV with different theoretical approaches …

Many-body and single-body low-energy elastic positron scattering by beryllium atoms: From ab initio to semiempirical approaches

MV Barp, W Tenfen, F Arretche - Atoms, 2023 - mdpi.com
Positron scattering by beryllium atoms in the low-energy range (≤ 4.0 eV) was studied
within ab initio and semiempirical frameworks. When interpreting the static dipole …

Positron annihilation in large polyatomic molecules. The role of vibrational Feshbach resonances and binding

GF Gribakin, CMR Lee - The European Physical Journal D, 2009 - Springer
We analyse the process of rapid positron annihilation in large polyatomic molecules due to
positron capture into vibrational Feshbach resonances. Resonant annihilation occurs in …

Enhanced positron annihilation in small gaseous hydrocarbons: Threshold effects from symmetric bond deformations

T Nishimura, FA Gianturco - Physical Review A—Atomic, Molecular, and …, 2005 - APS
The present results report a computational analysis of the effects of symmetric bond
stretching during positron scattering from polyatomic hydrocarbon molecules in the gas …