Eur. Phys. J. D (2015) 69: 15
https://doi.org/10.1140/epjd/e2014-50269-1

Regular Article

Excitation of dysprosium atom levels belonging to even 4f⁹6s²6p and 4f¹⁰6p² configurations

National Research University, Moscow Power Engineering Institute, 14 Krasnokazarmennaya str., 111250 Moscow, Russia

^a e-mail: SmirnovYM@mpei.ru

Received: 1 April 2014
Received in final form: 10 July 2014
Published online: 13 January 2015

Abstract

Excitation of radiative transitions of dysprosium atoms from even levels belonging to 4f⁹6s²6p and 4f¹⁰6p² configurations has been studied by experiment. Sixty-six excitation cross sections measured at an exciting electron energy of 30 eV. Four optical excitation functions recorded in the electron energy range of 0−200 eV. A classification based on known DyI energy levels proposed for several spectral lines. In most cases excitation cross-sections measured do not exceed 1 × 10^-18 cm² as the parity of upper levels studied in the present paper coincide with the parity of the DyI ground level which is the initial level in the excitation process.