Differential collision cross section

The differential collision cross section is defined as a positive proportionality factor, but in our analysis we get ... 

Intermolecular Potentials and Macroscopic Properties of Argon and Neon from Differential Collision Cross Sections... 

Spectroscopic Determination of Differential Collision Cross Sections in Crossed Molecular Beams... 

If the radiation is unpolaiized, the differential collision cross section depends only on the angle of deflection 6, so the cross section a can be determined by integrating (dald l)g ova- a hemisphere, according to... 

Kinematic cooling works for cooling a wide range of molecules and atoms irrespective of the unique properties of the individual molecules and atoms. While this technique is general, it does rely on a favorable mass ratio between the colliding particles, favorable rotational spacings, and favorable differential collision cross-sections. However, as we have demonstrated, even with fixed mass ratios and rotational spacings, the initial velocities and differential cross-sections can be manipulated in order to produce cold molecules. 

Combining (2.148) and (2.149) an important relationship between the differential cylinder collision cross sectional area b db dip and differential collision cross section [Pg.231]

After several decades of systematic electron spectroscopy in ion-atom collisions by many groups (for recent reviews see Refs. 13 and 51), there are only two data sets of doubly differential experimental cross sections cfa/dE dfl for the emission of electrons with < 1 eV. It has been only recently that, with entirely new and extremely efficient electron spectrometers combined with recoil-ion momentum spectroscopy [52], doubly differential cross sections for ultralow -and low-energy electrons (1.5 meV < < 100 eV) have been obtained by... 

In practice, many atomic collision experiments can be performed without recourse to brightness enhancement, and the first generation of studies of various positron-atom (molecule) differential scattering cross sections were performed in this manner. The results of these investigations are reported in later chapters. 

Lindhard et al. used a Thomas-Fermi potential and calculated the differential scattering cross section for multiple collisions as... 

An important tool in the study of protein conformation and noncovalent protein complexes is the on-line combination of ion-mobility spectrometry (IMS) and MS. The IMS-MS instruments consists of an ESI source with related ion optics, a drift tube, and a mass spectrometer [75-76]. Quadrapole and TOF-MS instruments have been applied most frequently. In an IMS instrument, ions drift through a buffer gas under the iirfluence of a weak uniform electric field. The IMS separation of ions is based on differential mobility of ions related to shape and charge state. Within a particular charge state, compact ions show a higher mobility than more extended structures, because they experience fewer collisions. In this way, conformation differences between ions can be discovered. Compact ions have a smaller collision cross section. 

Performing simple trigonometrical analysis of Fig. 2.2 it is seen that the number of deflected molecules considered equals the number of molecules that passed through the differential cylinder collision cross section area, bd[Pg.236]

Stefan-Boltzmann constant, = 5.67 x 10 W/rn K ) alternative total (scattering) collision cross section rn ) collision diameter used in kinetic theory (m) differential scattering cross section rn ) surface tension N/m)... 

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