Structure in the Zn I absorption spectrum associated with the excitation of the 3s ² subshell

Abstract

New structure in the absorption spectrum of Zn I vapour between 70 and 105 Å is reported. The experiment was performed by using the continuous radiation of the Bonn 2.5 GeV synchrotron as background source. The structure is due to excitation of the 3s 2 subshell. A comparison with semi-empirical and Hartree-Fock predictions is made.

VUV/EUV ionising radiation and atoms and ions: dual laser plasma investigations

“…For the four ion stages, Cowan code (Cowan 1981) calculations were performed and the main identified resonances are shown in the lower panel of Figure 15 for comparison with the experimental results. The neutral zinc spectrum was initially optimised in the energy region corresponding to 3s excitation (Connerade and Mansfield 1974) and the spectrometer was then reset to the energy region where 3p excitations were predicted to occur. Using a flashlamp pumped dye laser and a line focus configuration, an absorbing column length of approximately 15 mm was produced and the absorption spectrum in the lower curve of the upper panel of figure 15 was recorded.…”