Observation of Pumping Reaction in an Amine-Based All Gas-Phase Iodine Laser Medium

Abstract

Different possible adsorption sites of rubidium atoms on a GaAs(110) surface have been investigated using ab-initio self-consistent Hartree-Fock energy cluster calculations followed by detailed correlation investigations at the level of fourth-order many-body perturbation theory. The Hay-Wadt effective core potentials have been used to represent the cores of the rubidium, gallium and arsenic atoms. We find that the Rb atom adsorption at a site modelled with a RbGa 5 As 4 H 12 cluster is most favoured energetically followed by Rb adsorption at a site modelled with a RbGa 4 As 5 H 12 cluster. Significant charge transfer from the Rb atom to the GaAs surface is also found to occur, with Ga atoms losing charge and As atoms gaining charge. Finally, comparisons are made among different alkali atom adsorptions on the GaAs(110) surface.

Characteristics of an all gas-phase iodine laser using molecular iodine as atomic iodine donor

“…The iodine reservoir is made of glass, and it is maintained at a temperature of 370 K to produce molecular iodine vapour, which is transported to the discharge tube by helium gas. NCl 3 was synthesized prior to the experiment and stored in a dry-ice/methanol bath [11].…”

“…is the Doppler line width FWHM and A 3,4 = 5 s −1 is the Einstein coefficient for spontaneous emission. In equation (11), k is the Boltzmann constant, ν 0 = 2.28 × 10 14 Hz is the iodine line centre frequency and M is the atomic weight of iodine. The fraction of dissociated iodine molecules,…”

“…suppressing its concentration is essential to enhance the gain of amine-based AGILs [10]. Moreover, the use of reaction (6) has a further advantage as an iodine atom generation scheme in amine AGILs, since H atoms are used to generate I atoms according to equation ( 4), and the low efficiency of H 2 dissociation results in the low density of H atoms and the slow production of I atoms, prevented us from achieving a high small-signal gain in our original apparatus [11]. In our previous publication, we have reported the operation of a continuous-wave AGIL that uses molecular iodine as an atomic iodine donor (I 2 -AGIL), for the first time [12].…”

Photoelectron Photoion Coincidence Spectroscopy of NCl3 and NCl2

“…Furthermore, the molecule is also considered for use in chemical lasers. [3] From the inorganic chemistry point of view, chloramines are of interest as a versatile reagent, and because of the low polarity of the N−Cl bond. [4] Note that the electronegativities of N and Cl are almost identical.…”