The European Physical Journal D

, Volume 60, Issue 2, pp 219–222

The electron affinity of tungsten

Atomic Physics

DOI: 10.1140/epjd/e2010-00199-y

Cite this article as:
Lindahl, A., Andersson, P., Diehl, C. et al. Eur. Phys. J. D (2010) 60: 219. doi:10.1140/epjd/e2010-00199-y

Abstract

The electron affinity of tungsten has been measured using laser photodetachment threshold spectroscopy in a collinear geometry. The electron affinity was determined to 6583.6(6) cm-1 by observing the onset of the process when W- ions in the \(5d^56s^2\)6S5/2 ground state are photodetached producing neutral W atoms in the \(5d^46s^2\)5D0 ground state. The measured value is in agreement with previous measurements and improves the accuracy by almost two orders of magnitude. Further, a photodetachment signal below the ground state photodetachment threshold was found, which indicates the existence of a bound excited state in W-.

Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  1. 1.Department of PhysicsUniversity of GothenburgGothenburgSweden
  2. 2.Institut für Physik, Johannes Gutenberg-UniversitätMainzGermany
  3. 3.Faculty of Physics, University of ViennaWienAustria
  4. 4.Max-Planck-Institut für KernphysikHeidelbergGermany