Helium Droplets Doped with Sulfur and C(60)

[Image: see text] Clusters of sulfur are grown by passing superfluid helium nanodroplets through a pickup cell filled with sulfur vapor. In some experiments the droplets are codoped with C(60). The doped droplets are collided with energetic electrons and the abundance distributions of positively and negatively charged cluster ions are recorded. We report, specifically, distributions of S(m)(+), S(m)(–), and C(60)S(m)(–) containing up to 41 sulfur atoms. We also observe complexes of sulfur cluster anions with helium; distributions are presented for He(n)S(m)(–) with n ≤ 31 and m ≤ 3. The similarity between anionic and cationic C(60)S(m)(±) spectra is in striking contrast to the large differences between spectra of S(m)(+) and S(m)(–).