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157 papers · 1 filter
Dissociative positronium attachment in halogen gases
R. S. Wilde, G. F. Gribakin, I. I. Fabrikant
We suggest that the observed large annihilation rates of ortho-positronium (-Ps) in halogen gases are due to the process of dissociative Ps attachment, ${\rm Ps} + X_2 \to {\rm…
Phase evolution of strong-field ionization
Lynda R Hutcheson, Maximilian Hartmann, Gergana D Borisova +6
We investigate the time-dependent evolution of the dipole phase shift induced by strong-field ionization (SFI) using attosecond transient absorption spectroscopy (ATAS) for time-de…
L-shell Photoionisation Cross Sections in the S^{+}, S^{2+}, S^{3+} Isonuclear Sequence
J. -P. Mosnier, E. T. Kennedy, D. Cubaynes +6
We present absolute L-shell photoionisation cross sections for the S+, S2+, S3+ions. The cross sections were obtained using the monochromatised photon beam delivered by the SOLEIL…
Luminosity predictions for the first three ionisation stages of W, Pt and Au to probe potential sources of emission in kilonova
M. McCann, L. P. Mulholland, Z. Xiong +7
A large number of R-matrix calculations of electron impact excitation for heavy elements (Z > 70) have been performed in recent years for applications in fusion and astrophysics re…
Many-Body Theory Calculations of Positron Scattering and Annihilation in H, N and CH
C. M. Rawlins, J. Hofierka, B. Cunningham +2
The recently developed ab initio many-body theory of positron molecule binding [J. Hofierka et al., Nature, 606, 688 (2022)] is combined with the shifted pseudostates method [A. R.…
Enhancing spin polarization using ultrafast angular streaking
Gregory S. J. Armstrong, Daniel D. A. Clarke, Jakub Benda +3
Through solution of the multielectron, semi-relativistic, time-dependent Schrödinger equation, we show that angular streaking produces strongly spin-polarized electrons in a noble…