▪ Abstract A review of recent high-resolution microwave, infrared, and optical spectroscopy
experiments demonstrates that remarkable progress has been made in the past 20 years in …

Theidea of molecular structure is discussed from the point of view of the quantum theory: we
show that the modern picture of a molecule as a bound collection of electrons and nuclei is …

It is demonstrated that matrix‐like spectroscopy may be carried out in the gas phase using
molecular beams of clusters and the conditions under which bulk‐matrix‐like behavior is …

Computation of accurate geometrical structures and spectroscopic properties of large
flexible molecules in the gas-phase is tackled at an affordable cost using a general …

Diatomic molecules are important across the whole of the physical sciences. They are the
basic building blocks of large molecules and many of the principles which underlie our …

Spectroscopy provides a variety of experimental routes for the exploration of the structures of
molecules and of intra-and intermolecular vibrations and binding energies. While the …

The basic principles of electronic spectroscopy of atoms and molecules in the gas phase are
presented. In the first part, the elementary concepts necessary to describe the electronic …

Weakly bound molecular clusters are size selected by momentum transfer in a scattering
experiment with atoms and then photodissociated byinfrared photons to generate spectra as …

The spectroscopy of single molecules in frozen matrices at liquid helium temperatures
reveals very narrow lines, often with lifetime-limited widths. The sensitivity of such sharp …

The study of weakly bound complexes and clusters promises to provide a bridge between
the properties of isolated molecules and those of dense phases. We describe briefly the …