Yasushi Kino

Eur. Phys. J. D (2026) 80: 111 https://doi.org/10.1140/epjd/s10053-026-01206-y Research - Atoms, Molecules, Ions, and Cluster A four-body calculation of the radiative dissociation of excited positronium molecules 1a, 1,2 and 1 1 Department of Chemistry, Tohoku University, 980-8578, Sendai, Miyagi, Japan 2 Institute for Excellence in Higher Education, Tohoku University, 980-8576, Sendai, Miyagi, Japan a This email address is being protected from spambots. You need JavaScript enabled to view it.

2025 Impact factor 1.8 Atomic, Molecular, Optical and Plasma Physics Perspectives and Recent Advances in Electron, Swarms, Positron and Positronium Physics. Guest editors: Paulo Limão-Vieira, Márcio Bettega, Dragana Marić, Masanori Tachikawa, Marco Lima, David B.

We present phase-shift calculations for positron collisions with positive ions using a complex scaling method (CSM) in which the phase shifts are derived only from the complex eigenenergies of the CSM Hamiltonian. Based on the findings of this study [R. Suzuki, T. Myo, and K. Katō, Prog. Theor. Phys. 113, 1273 (2005)], we propose a modification of the phase shift in the CSM calculation for application to few-body scattering problems.