Laser-induced delayed electron emission of Co−4 anions

The cryogenic trap for fast ion beams (CTF) located at the Max-Planck-Institut fur Kernphysik has been used to study laser-induced delayed electron emission of various molecular and metal-cluster anions. We will discuss recent experiments investigating the radiative cooling respectively heating of Co−4 anions produced in hot and cold ion sources. The experiments will be continued at the cryogenic storage ring (CSR), which is presently being commissioned, to disentangle laser-induced electron emission from atom or cluster dissociation.