Atomic shell structures observed in photoionization spectra of nickel and cobalt clusters
Nickel and cobalt clusters have been studied by near threshold laser-photoionization and time-of-flight mass spectrometry. In the size domain from 50 up to 800 atoms, the mass distributions of the photoionized products look very similar for nickel and cobalt clusters. In both cases a regular structure is observed which is periodic on a N1/3 scale. It is found to be consistent with the filling of successive icosahedral shells of atoms. The recurring details of this structure agree with the so-called umbrellas model.
KeywordsIonization Threshold Aluminum Cluster Cobalt Cluster Nickel Cluster Electronic Shell Structure
- 4.Broyer, M.: invited paper to this conference. To be published in the same issue; Pellarin, M., Baguenard, B., Bordas, C., Broyer, M., Lermé, J., and Vialle, J.L.: submitted to Phys. Rev.Google Scholar