Electronic structure and rovibrational predissociation of the 2sPi state in KLi

Abstract

Adiabatic potential energy curves of the 3sSigma+, 3tSigma+, 2sPi and 2tPi states correlating for large internuclear distance with the K(4s) + Li(2p) atomic asymptote were calculated. Very good agreement between the calculated and the experimental curve of the 2sPi state allowed for a reliable description of the dissociation process through a small (20 cm-1 for J = 0) potential energy barrier. The barrier supports several rovibrational quasi-bound states and explicit time evolution of these states via the time-dependent nuclear Schroedinger equation, showed that the state populations decay exponentially in time. We were able to precisely describe the time-dependent dissociation process of several rovibrational levels and found that our calculated spectrum match very well with the assigned experimental spectrum. Moreover, our approach is able to predict the positions of previously unassigned lines despite their low intensity

References in corpus (6)

• Exploring an ultracold Fermi-Fermi mixture: Interspecies Feshbach resonances and scattering properties of 6Li and 40K
• New frontiers with quantum gases of polar molecules
• Ultracold Heteronuclear Fermi-Fermi Molecules
• Simultaneous sub-Doppler laser cooling of fermionic ${}^6$Li and ${}^{40}$K on the D${}_1$ line: Theory and Experiment
• Large atom number dual-species magneto-optical trap for fermionic 6Li and 40K atoms
• Potential energy surfaces of the low-lying electronic states of the Li + LiCs system

Cited by in corpus (3)

• Spontaneous Electron Emission Versus Dissociation in Internally Hot Silver Dimer Anions
• Implementation of high-precision computation capabilities into the open-source dynamic simulation framework YADE
• Optimization of the Femtosecond Laser Impulse for Excitation and the Spin-Orbit Mediated Dissociation in the NaRb Dimer