J. Phys. Colloques
Volume 47, Numéro C2, Mars 198632 nd International Field Emission Symposium / 32ème Symposium International d'Emission de Champ
|Page(s)||C2-101 - C2-106|
J. Phys. Colloques 47 (1986) C2-101-C2-106
ON THE ENERGY DISTRIBUTION OF CLUSTERS FROM LIQUID GOLD ION SOURCESS. PAPADOPOULOS1, D.L. BARR2 et W.L. BROWN2
1 Department of Engineering Science, Wolfson College, University of Oxford, GB-Oxford, OX2 6UD
2 AT&T Bell Laboratories, Murray Hill, NJ 07974, U.S.A.
We have studied the changes in the energy distribution of the Au++3 and Au+2 species from Au liquid metal ion sources (LMIS) with increasing current. The distributions are single peaked at low currents but develop secondary maxima at higher currents. We evaluate the feasibility of several mechanisms that have been proposed in order to explain such changes and find them unsatisfactory. We propose two alternative models which may be effective. We have also studied the angular intensity and the energy distributions of the above species as well as those of the Au++ species as a function of angle of emission. These results further emphasize the complexity of the processes by which these species are created, and which, as yet, are not well understood.