Noble gases sampling techniques

To successfully use high-resolution molecular spectroscopy to study tunneling, two conditions have to be met suppression of hot bands and removal of inhomogeneous broadening. In the traditional technique of equilibrium sample preparation these conditions are mutually exclusive To decrease the hot band intensity one needs to lower the temperature, which entails the condensation of a sample and, consequently, appearance of inhomogeneous spectral effects which are due to intermolecular interactions in the solid. To some extent, a compromise is achieved in the matrix isolation method, where the intermolecular interactions between the guest and host molecules are minimized by using the noble gas matrix. However, even in this case the asymmetry of the potential is... 

Any attempt to calculate individual noble gas components present in a sample must be based on a conceptual model, specifying which components are assumed to be present and what their composition is. In the first part of this section, we will discuss the models that up to the present have been developed. In the second part, actual techniques to perform the component separation are discussed. Finally, we introduce the basic concepts that are needed to interpret the inferred components in terms of age, temperature, or other quantities. 

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