Energy sudden

The problem of the successful ionization of thermally labile molecules has been addressed by the introduction of energy-sudden techniques, such as fast-atom bombardment (FAB), which rely on the fact that energy may be provided to the molecule so rapidly that desorption takes place before decomposition may occur. 

Energy-sudden ionization technique One in which energy is provided to a thermally labile molecule so rapidly that it is desorbed and ionized before decomposition takes place. 

The idea behind the rapid heating of a DEP is to achieve evaporation faster than thermal degradation of the sample. [50,51] This principle is realized in perfection with energy-sudden methods (Chaps. 9, 10). 

In the ESA-CSA method [26] the energy sudden approximation (ESA) is applied to the entrance reaction channel and the CSA to the exit channel. This technique gives considerable computational simplications compared to the CC and CSA methods, although retaining a good accuracy as the results of Section 4 show. 

Abstract. We present an overview of the influence of C.F. Curtiss on the theory of molecular collisions, as exemplified by the title paper. Both authors were graduate students of Curtiss and, as such, were strongly influenced by his ideas and approaches to theoretical chemistry. This resulted in a subsequent collaboration that provided the rigorous basis for understanding the success of the so-called centrifugal sudden and energy sudden approximations (the two combined being the infinite order sudden approximation). 

In an lOS approach the application of both the energy sudden and the centrifugal sudden" decoupling scheme reduces the exact Schroedinger equation for the atom-diatom scattering into a set of fixed angle of approach (7) two mathematical dimension ones. In the Body Fixed formulation these equations read as... 

The desorption of ions and neutrals into the vacuum upon irradiation of a laser pulse proceeds as a jet-like supersonic expansion [39] a small, but initially hot and very rapidly expanding plume is generated [15,52]. The description of MALDI as an energy-sudden method [42] nicely expresses the explosive character of the plume formed by the nanosecond laser pulse. As the expansion is adiabatic, the process is accompanied by fast cooling of the plume [39]. 

---