During the last decade, significant new experimental techniques have been developed to investigate the interaction of ionizing radiation (UV, VUV, gamma rays, charged particles) and of neutrals (atoms, radicals, molecules, grains) with surfaces of solids (ices, minerals, carbonaceous compounds) in the Solar System and in the Interstellar Medium (ISM). These processes provide new fun-damental insights – sometimes on the molecular level - into the processes that are critical to the chemistry in the ISM, star and planet forming regions, and on/in icy objects in the Solar Sys-tem from the formation of the simplest molecule (molecular hydrogen) to astrobiologically important species such as amino acids and sugars. There is an increasing convergence of interests of these fields, so a ‘united’, bi-annual workshop is highly desired. The first workshop features invited (senior and junior researchers) as well as contributed talks focusing on the interaction of ionizing radiation (UV, VUV, gamma rays, charged particles) and neutrals (atoms, radicals, molecules, grains) with low temperature solids (ices, minerals, organics). The talks can be extended to observations, modeling, and electronic structure calculations, but only if these topics can be directly linked – as evident from the abstract – to laboratory experiments. Poster submissions are highly encouraged; this will allow a broad participation of newcomers to the field (Ph.D. students, postdocs).