Eur. Phys. J. D 46, 437-442 (2008)
https://doi.org/10.1140/epjd/e2008-00010-x

High resolution measurement and MQDT analysis of the 5d⁹ 6s² np, nf (J = 1) autoionizing resonances of mercury

¹ Atomic and Molecular Physics Laboratory, Quaid-i-Azam University, 45320 Islamabad, Pakistan
² Physikalisches Institut, Universität Bonn, Nussallee 12, 53115 Bonn, Germany

Corresponding author: ^a baig@qau.edu.pk

Received: 2 October 2007
Revised: 13 November 2007
Published online: 23 January 2008

Abstract

We report new high resolution photoabsorption measurements of the 5d-subshell excitation spectra of mercury using a 3-meter normal incidence spectrograph equipped with a 6000 line/mm holographic grating and synchrotron radiation emitted by the Bonn 2.5 GeV electron accelerator as the background source of continuum. The observed spectra reveal autoionizing resonances attached to the 5d⁹(²D_5/2)6s² and 5d⁹(²D_3/2)6s² parent ion levels of mercury. We have analysed the line shapes of the lower members of the 5d⁹6s² np and nf J = 1 autoionizing resonances using the phase shifted formulation of the MQDT and extracted the interaction parameters.