The present volume contains contributions presented at the NATO Advanced
Study Institute on Molecular Ions held on the island of Kos, Greece,
from September 30 to October 10, 1980. The meeting was attended by some
60 participants from 15 different countries. It was the first meeting
devoted exclusively to the topic of molecular ions. Its vitality derived
from bringing together experts and students from a wide variety of
disciplines, whose studies bear upon the structure of molecular ions.
The aim of the meeting was to assemble these scientists, representing
many countries in Europe and North America, to discuss the advances and
capabilities of the various experimental and theoretical approaches and
to point out un- solved problems and directions for future research. The
format, in- volving lecturers and students, served as a tutorial.
Molecular ions play an important role in very diverse fields of nature
such as reactions in the ionosphere, the processes of forma- tion of
molecules in dense interstellar clouds, and the magnetohydro- dynamics
of plasmas used for energy generation. Our understanding of the
properties of molecular ions, their electronic and geometric structures,
has been developing from a variety of sources, as far removed as
tickling ions with radiofre- quency radiation and smashing them apart at
relativistic energies. Various laser techniques are described, and the
queen of structural determination, spectroscopy, is well represented. On
the instrumen- tal side, older techniques have been perfected and new
methods have evolved.