95 citations · 497 across the 15 of their papers we have counts for
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Calculations of positronium-atom scattering using a spherical cavity
A. R. Swann, G. F. Gribakin
Positronium (Ps) scattering by noble-gas atoms (He, Ne, Ar, Kr, and Xe) is studied in the frozen-target approximation and with inclusion of the van der Waals interaction. Single-pa…
Effective radius of ground- and excited-state positronium in collisions with hard walls
R. Brown, Q. Prigent, A. R. Swann +1
We determine effective collisional radii of positronium (Ps) by considering Ps states in hard-wall spherical cavities. -spline basis sets of electron and positron states inside…
Dynamics of atomic spin-orbit-state wave packets produced by short-pulse laser photodetachment
S. M. K. Law, G. F. Gribakin
We analyse the experiment by Hultgren et al. [Phys. Rev. A {\bf 87}, 031404 (2013)] on orbital alignment and quantum beats in coherently excited atomic fine-structure manifolds pro…
Ps-atom scattering at low energies
I. I. Fabrikant, G. F. Gribakin
A pseudopotential for positronium-atom interaction, based on electron-atom and positron-atom phase shifts, is constructed, and the phase shifts for Ps-Kr and Ps-Ar scattering are c…
Similarity between positronium-atom and electron-atom scattering
I. I. Fabrikant, G. F. Gribakin
We employ the impulse approximation for description of positronium-atom scattering. Our analysis and calculations of Ps-Kr and Ps-Ar collisions provide theoretical explanation of t…
Relativistic coupled-cluster single-double calculations of positron-atom bound states
V. A. Dzuba, V. V. Flambaum, G. F. Gribakin +1
Relativistic coupled-cluster single-double approximation is used to calculate positron-atom bound states. The method is tested on closed-shell atoms such as Be, Mg, Ca, Zn, Cd, and…
Formation Of A Cold Antihydrogen Beam in AEGIS For Gravity Measurements
G. Testera, A. S. Belov, G. Bonomi +62
The formation of the antihydrogen beam in the AEGIS experiment through the use of inhomogeneous electric fields is discussed and simulation results including the geometry of the ap…
Electron attachment to SF6 and lifetimes of SF6- negative ions
L. G. Gerchikov, G. F. Gribakin
We study the process of low-energy electron capture by the SF6 molecule. Our approach is based on the model of Gauyacq and Herzenberg [J. Phys. B 17, 1155 (1984)] in which the elec…
Positron-molecule annihilation by capture into vibrational Feshbach resonances of infrared-active modes
G. F. Gribakin, C. M. R. Lee
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 hal…
Application of the zero-range potential model to positron annihilation on molecules
G. F. Gribakin, C. M. R. Lee
In this paper we use a zero-range potential (ZRP) method to model positron interaction with molecules. This allows us to investigate the effect of molecular vibrations on positron-…
Electron recombination with multicharged ions via chaotic many-electron states
V. V. Flambaum, A. A. Gribakina, G. F. Gribakin +1
We show that a dense spectrum of chaotic multiply-excited eigenstates can play a major role in collision processes involving many-electron multicharged ions. A statistical theory b…
Calculation of the positron bound state with the copper atom
V. A. Dzuba, V. V. Flambaum, G. F. Gribakin +1
A new relativistic method for calculation of positron binding to atoms is presented. The method combines a configuration interaction treatment of the valence electron and the posit…
Statistics of electromagnetic transitions as a signature of chaos in many-electron atoms
V. V. Flambaum, A. A. Gribakina, G. F. Gribakin
Using a configuration interaction approach we study statistics of the dipole matrix elements (E1 amplitudes) between the 14 lower odd states with J=4 and 21st to 100th even states…