Accession Number : ADA266295


Title :   Thermal Disorder in Adsorbed Cl on Si(100)


Descriptive Note : Technical rept.


Corporate Author : PITTSBURGH UNIV PA SURFACE SCIENCE CENTER


Personal Author(s) : Cheng, C C ; Gao, Q ; Dohnalek, Z ; Choyke, W J ; Yates, Jr , J T


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a266295.pdf


Report Date : 21 May 1993


Pagination or Media Count : 25


Abstract : Thermal broadening of C1(+) ESDIAD patterns, related to the vibrational motion of the adsorbate, has been investigated by subtraction of patterns measured at different temperatures. In the case of C1 on Si(100), the observed difference pattern between 130 K and 305 K indicates that azimuthally isotropic motion of C1 occurs about the most probable Si-C1 bond direction. Equal distributions from the in-plane and out-of-plane bending motions are observed, correlating with the approx 200 /cm frequencies associated with these motions.


Descriptors :   *IONS , *SILICON , *CHLORIDES , THERMAL PROPERTIES , TEMPERATURE , ADSORPTION , MOTION , SINGLE CRYSTALS , SURFACES , ADSORBATES , DESORPTION , AZIMUTH , AMPLITUDE , DIFFUSION , PATTERNS , ELECTRONS , CHEMICAL BONDS , BENDING , ORIENTATION(DIRECTION) , EXCITATION , VIBRATION , FREQUENCY


Subject Categories : Physical Chemistry
      Atomic and Molecular Physics and Spectroscopy
      Thermodynamics


Distribution Statement : APPROVED FOR PUBLIC RELEASE