EVIDENCE FOR A "CHEMICAL" WELL BETWEEN Xe AND Cl ATOMS

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 Title: EVIDENCE FOR A "CHEMICAL" WELL BETWEEN Xe AND Cl ATOMS Creators: Becker, C. H.; Valentini, J. J.; Lee, Y. T. Issue Date: 1976 Abstract: An investigation of the interaction potential between ground state Xe and $Cl(^{2}P_{3/2})$ atoms has been carried out experimentally by crossing two supersonic atomic beams and measuring the relative differential cross section $\left ( \frac {d\sigma} {d\Omega} \right )$ of $^{35}Cl$ as a function of laboratory angle. The $Ar + Xe$ system has also been studied for comparison. The usual heavier rare gas scattering structures, namely, rainbow and supernumerary rainbows were resolved in the $Ar + Xe$ data. However, the $Cl + Xe$ data displays a new oscillatory structure qualitatively different from the rare gas pair. Analysis consists of assuming a potential, by an analytic form, and numerically integrating Schr\""{o}dinger’s equation to obtain scattering phase shifts, and hence $\frac {d\sigma} {d\Omega}$. The potential is found by fitting the experimental points with the calculated values. In this way, evidence for a shallow $(< 1 kcal/mole)$ chemical well for ClXe approximately 1 {\AA} inside the ArXe van der Waals’ well location has been found. This well coexists with an outer region, probably of van der Waals’ character, giving the potential an unusual shape. URI: http://hdl.handle.net/1811/9686 Other Identifiers: 1976-RC-4