151 citations · 1.2k across the 19 of their papers we have counts for
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Two-center two-electron integrals with exponential functions
Krzysztof Pachucki
We present an efficient approach to evaluate two-center two-electron integrals with exponential functions and with an arbitrary polynomial in electron-nucleus and electron-electron…
Electric dipole rovibrational transitions in HD molecule
Krzysztof Pachucki, Jacek Komasa
The rovibrational electric dipole transitions in the ground electronic state of the HD molecule are studied. A simple, yet rigorous formula is derived for the transition rates in t…
Ortho-para transition in molecular hydrogen
Krzysztof Pachucki, Jacek Komasa
The radiative ortho-para transition in the molecular hydrogen is studied. This highly forbidden transition is very sensitive to relativistic and subtle nonadiabatic effects. Our re…
Nonadiabatic corrections to the wave function and energy
Krzysztof Pachucki, Jacek Komasa
Nonadiabatic corrections in molecules composed of a few atoms are considered. It is demonstrated that a systematic perturbative expansion around the adiabatic solution is possible,…