Infrared absorption of liquid-hydrogen planar cryotargets

Abstract

Using a home-made cryotarget system and infrared spectroscopy system, we measure the infrared absorption spectra of liquid hydrogen at low temperaturs. It is found that the fundamental vibration frequency of hydrogen molecule is 4237.3 cm-1. As liquid hydrogen cools from 19.75 K down to 16.75 K, the infrared absorption is enhanced. The vibration frequency of hydrogen molecules is calculated on the basis of non-harmonic approximation in order to explain the experimental ones.

The infrared-induced temperature distributions of solid D2ices

“…By using the planar cryotarget system shown in Refs. [9] and [10], the solid D 2 ice was grown from the vapor phase by cooling through the triple-point temperature [11] T tp (the triplepoint temperature of deuterium in the standard condition) in a target cell (see Fig. 1).…”

Spectroscopy and scattering matrices with nitrogen atom: Rydberg states and optical oscillator strengths

“…As an open-shell element, nitrogen also is extremely useful for plasma modeling. Previous research works [27][28][29][30][31][32][33] on the nitrogen atom have mainly studied the electronic structures and transitions for low-lying energy states because of the correlation effect of electrons. How-ever, we are able to stretch the energy region to the extent of high Rydberg states with high precision and less computational costs using R-R-Eigen.…”