Absorption effects in intermediate-energy electron scattering by hydrogen sulphide

Autor(es)

Brescansin, L. M. ^[1] ; Machado, L. E. ^[2] ; Lee, M-T ^[3] ; Cho, H. ^[4] ; Park, Y. S. ^[4]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil

^[3] Univ Fed Sao Carlos, Dept Quim, BR-13565905 Sao Carlos, SP - Brazil

^[4] Chungnam Natl Univ, Dept Phys, Taejon 305764 - South Korea

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS; v. 41, n. 18 SEP 28 2008.
• Citações Web of Science: 21

Resumo

In this work, we present a joint theoretical-experimental study on elastic electron-H(2)S collisions in the low- and intermediate-energy range. Absolute differential cross sections have been measured for energies in the 30-100 eV range over scattering angles between 10 degrees and 180 degrees, using a crossed-beam electron spectrometer combined with a magnetic angle-changing device to extend the measurements to backward angles. In addition, differential, integral and momentum-transfer cross sections as well as total and absorption cross sections are calculated and reported for energies ranging from 1 to 500 eV. A complex optical potential was used to represent the electron-molecule interaction dynamics. The iterative Schwinger variational method combined with the distorted-wave approximation was used to solve the scattering equations. The comparison between our calculated and measured results, as well as with other experimental and theoretical data available in the literature, is encouraging. (AU)