G. Forgacs^*,†

• Department of Chemistry, State University of New York at Albany, Albany, New York 12222

S. T. Chui^‡ and H. L. Frisch

• Department of Physics, State University of New York at Albany, Albany, New York 12222

• ^*Present address: Dept. of Phys., University of Illinois at Urbana, Ill. 61801.
• ^†Permanent address: Central Research Institute for Phys., 1525 Budapest, 114 P.O.B. 49, Hungary.
• ^‡Present address: Bartol Foundation of the Franklin Institute, University of Delaware, Newark, Del. 19711.