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Energy and angular distribution of electrons ejected from water by the impact of fast O8+ ion beams

  • Shamik Bhattacharjee
  • Chandan Bagdia
  • Madhusree Roy Chowdhury
  • Juan M. Monti
  • Roberto D. Rivarola
  • Lokesh C. TribediEmail author
Regular Article

Abstract

Double differential cross sections (DDCS) of electrons emitted from vapor water molecules (in vapor phase) by 2.0 MeV/u and 3.75 MeV/u bare oxygen ion impact have been measured by continuum electron spectroscopy technique. The ejected electrons were detected by an electrostatic hemispherical deflection analyzer over an energy range of 1–600 eV and emission angles from 20 to 160. The DDCS data has been compared with the continuum-distorted-wave-eikonal-initial state (CDW-EIS) approximation and a reasonable agreement was found with both version of the models i.e. post and prior version. By numerical integration of the DDCS data, the single differential cross section (SDCS) and total ionization cross section (TCS) were obtained. The obtained TCS results were compared with other available TCS results for water target within the same energy range. The total ionization cross sections values are seen to saturate as the projectile charge state (q p ) increases, which is in contrast to the first-Born predicted q p 2 dependence. This is also in contrast to the prediction of the CDW-EIS models.

Graphical abstract

Keywords

Atomic and Molecular Collisions 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Shamik Bhattacharjee
    • 1
  • Chandan Bagdia
    • 1
  • Madhusree Roy Chowdhury
    • 1
  • Juan M. Monti
    • 2
  • Roberto D. Rivarola
    • 2
  • Lokesh C. Tribedi
    • 1
    Email author
  1. 1.Tata Institute of Fundamental ResearchMumbaiIndia
  2. 2.Institute de Fisica Rosario (CONICET-UNR), Universidad Nacional de RosarioRosarioArgentina

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