High density self-broadening of the first xenon and krypton resonance line

Abstract

Self-broadening of the 146.96 nm xenon line and 123.58 nm krypton line is studied in the density range 1-100 amagat (2.7 x 1019 — 2.7 × 1021 at. cm-3). The absorption profile is deduced from reflection experiments by a modified Kramers-Krönig analysis. A detailed discussion of the criteria for validity of available theories is given, allowing the determination of the extent to which the cases studied are related to many-body interactions and/or pure resonance forces. The quasistatic theory, in the nearest neighbour approximation, is shown to be valid for interpreting the far wings. Thus it is possible at increasing density, to underline the specific effect of the various kinds of forces : resonance, Van der Waals and repulsive, and to specify the 1u excited state potential which is found weakly attractive for Xe2 and Kr2

Infrared continuum radiation from high and ultra-high pressure mercury lamps

“…The situation under UHP conditions is more complex since the single perturber approximation is breaking down. The main justification for using the same broadening coefficient under UHP conditions is the work by Laporte and Damany (1979) on resonance broadening of rare gases. The impact approximation formula matches their Xe and Kr data at the 10% level up to densities of ∼40 amagat or 1 × 10 21 cm −3 .…”

Reflectance measurement of the VUV spectrum of solid xenon and its temperature dependence up to the triple point

“…Particular attention will be paid to the understanding of the higher energy part of the spectrum (E > 9.7 eV) which is not discussed here. Actually no clear assignment has been done until now in that energy range (9.7-10.8 eV), but we think that the work undertaken on gaseous [15], fluid and liquid xenon [5,16] which is still in progress will be of use. This topic will be the subject of a forthcoming paper.…”

Simple Readout Channel Model of Super-Resolution Near-Field Structure Disk System

“…This compares extremely well with the Morse potential ( figure 3). Moreover, using a mean value of re = 0.49 nm (Castex 1981, Laporte and Damany 1979, Vallee et a1 1980 and the empirical relation r:w, = constant (Herzberg 1950), the Morse potential for B'l, has also been constructed which is in close agreement with the empirical potential of Castex (1981), figure 2.…”