Astrophysical ices, mainly composed of simple molecules such as H2O, CO, CO2, NH3, CH3OH and others are ubiquitous in space: they are present in comets, satellites of planets (e.g Jovian moons) and on the grains of the dense molecular clouds in the interstellar medium. They are constantly exposed to complex and diverse radiation fields and interact with photons, electrons and ions...
Collisions of molecular ions with electrons, such as dissociative recombination (DR) and inelastic electron collisions, play a key role in shaping the charge density and composition of cold plasmas, including the interstellar medium (ISM). Accurate rate coefficients are essential for modeling these astrophysical environments, yet theoretical calculations remain challenging due to the...
The cryogenically cooled ion beam storage ring facility DESIREE (Double ElectroStatic Ion Ring ExpEriment) is uniquely designed for studying mutual neutralization (MN) reactions in collisions between oppositely charged ions that are prepared in well-defined or narrow ranges of quantum states and with fine-control of the collision energy down to the sub-electronvolt regime [1,2]. In recent...
In a molecular system, the correlation-driven charge migration [1] (CDCM) is a purely electronic process that involves the ultrafast dynamics of electrons originating from coherent superposition of eigenstates followed by the ionization of a single molecular orbital [2]. The possibility of observing CDCM has been a driving force behind theoretical and experimental developments in the field of...
We study the role of electronic correlations during high harmonic generation (HHG) in multi-electron atoms. Originally viewed as a process involving one single active electron, the influence of multi-electron effects on the HHG spectrum has lately been extensively studied (see e.g. [1, 2]). We quantify the time-dependence of electron-electron correlations on ultrafast time scales using...
