Inner-shell photoemission from the iodine atom in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">CH</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span>I

D. W. Lindle; P. H. Kobrin; C. M. Truesdale; T. A. Ferrett; P. A. Heimann; H. G. Kerkhoff; U. Becker; D. A. Shirley

doi:10.1103/PhysRevA.30.239

Inner-shell photoemission from the iodine atom in ${CH}_{3}$ I

D. W. Lindle, P. H. Kobrin, C. M. Truesdale, T. A. Ferrett, P. A. Heimann, H. G. Kerkhoff, U. Becker, and D. A. Shirley

Phys. Rev. A 30, 239 – Published 1 July 1984

Abstract

The first photoemission measurements of the I $4 d$ and I " $4 p$ " subshells in methyl iodide are presented. Cross sections and angular-distribution asymmetry parameters were measured from threshold to 300 eV photon energy for the I $4 d$ level (to 440 eV for the asymmetry parameter), and from 175 to 300 eV for the I " $4 p$ " level. The I $4 d$ results exhibited atomiclike behavior throughout this energy range, mimicking the behavior of the Xe $4 d$ subshell. Theoretical calculations for the Xe $4 d$ subshell agree very well with the I $4 d$ asymmetry-parameter results, indicating that the I $4 d$ subshell is localized on the iodine atom in ${CH}_{3}$ I. Nearer to threshold, the spin-orbit final states, ${4 d}_{\frac{5}{2}}$ and ${4 d}_{\frac{3}{2}}$ , were resolved and exhibited nonstatistical intensity ratios mainly due to a kinetic energy effect. The I " $4 p$ " asymmetry-parameter results were found to be essentially identical to the asymmetry-parameter results for the I $4 d$ subshell at the same photon energies, suggesting strong interchannel coupling. This result is discussed with respect to collective effects in the iodine $N$ shell.

Received 23 December 1983

DOI:https://doi.org/10.1103/PhysRevA.30.239

Authors & Affiliations

D. W. Lindle, P. H. Kobrin^*, C. M. Truesdale^†, T. A. Ferrett, P. A. Heimann, H. G. Kerkhoff^‡, U. Becker^‡, and D. A. Shirley

Materials and Molecular Research Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 and Department of Chemistry, University of California, Berkeley, California 94720

^*Present address: Department of Chemistry, Pennsylvania State University, University Park, PA 16802.
^†Present address: Research and Development Division, Corning Glass Works, Corning, NY 14831.
^‡Permanent address: Fachbereich Physik, Technizche Universität Berlin, D-1000 Berlin 12, West Germany.

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Vol. 30, Iss. 1 — July 1984

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