Unusually high ionization energies have been observed for Cs-O clusters having certain sizes and compositions, namely for Cs/sub 2n+z/O/sub n/ with z=8, 18, 34, 58 and 92. The anomalies are well defined for clusters containing from one to seven oxygen atoms. The indicated values of z are identical to the numbers of electrons in closed shells of angular momentum.
Romain Christophe Rémy Fleury, Matthieu Francis Malléjac, Bakhtiyar Orazbayev, Stefan Rotter
Simon Nessim Henein, Florent Cosandier, Hubert Pierre-Marie Benoît Schneegans, Patrick Robert Flückiger
Camille Sophie Brès, Jianqi Hu, Yujie Chen