Low-temperature electrical discharge through solid xenon
A uniform self-sustained electrical discharge through solid xenon is realized and studied. The multiplication of electrons proceeds in the noble gas above the xenon crystal interface, whereas a positive feedback is realized on account of multiple exciton formation by excess electrons drifting through the crystal: molecular excitons emit VUV photons which knock out secondary electrons […]
Microsolvation of Li+ in a Mixture of Argon and Krypton: Unveiling the Most Stable Structures of the Clusters
The microsolvation of Li+ by both argon and krypton atoms has been studied based on a new potential energy surface that includes two- and three-body interactions; the potential terms involving the lithium ion were calibrated with CCSD(T)/aug-cc-pVQZ energies after being corrected for the basis-set superposition error. The structures of the Li+ArnKrm (n + ≤ m […]
An improved measurement of electron-ion recombination in high-pressure xenon gas
We report on results obtained with the NEXT-DEMO prototype of the NEXT-100 high-pressure xenon gas time projection chamber (TPC), filled with pure xenon gas at 10 bar pressure and exposed to an alpha decay calibration source. Compared to our previous measurements with alpha particles, an upgraded detector and improved analysis techniques have been used. We […]
Measurements of quantum defect in Rydberg D-states for lithium atoms
We have developed an effective spectroscopic method for measure the energy spectra of highly excited ultracold atoms using the registration of resonance fluorescence of atoms in magneto-optical trap during two-step cw excitation of Rydberg states by uv laser. Using this method it was obtained the value of the quantum defect was determined for Rydberg states […]
Influence of an applied electric field on state changing in xenon-Rydberg-atom —xenon collisions
The influence of an applied electric field on state changing in collisions between laser excited Xe(nf) atoms and xenon target gas is described. The presence of the field results in marked changes in both the rate constant for collisional state changing and the final-state distribution. The changes can be generally understood in terms of […]
Ionization of Hydrogen Rydberg Molecules at a Metal Surface
The interaction of a beam of Rydberg molecules with a metal surface is investigated for the first time. Hydrogen molecules in a supersonic expansion are excited to Rydberg states with principal quantum number n, in the range 17–22 and are directed at a small angle onto a flat surface of either aluminum or gold. Detection […]
A xenon collisional-radiative model applicable to electric propulsion devices
Electric propulsion devices of using xenon propellant are nowadays widely adopted for the space missions. A collisional-radiative (CR) model of xenon needs to be developed to understand the kinetic mechanisms of the excited and energetic species in these devices and also to support their optical diagnostics. Previously, due to limitations in the fundamental cross […]
Demonstration of a quasi-CW diode-pumped metastable xenon laser
CARL R. SANDERSON, 1 CHARLES W. BALLMANN, 1,* JIANDE HAN, 2 AMANDA B. CLARK, 3 BRETT H. HOKR, 4 KUNNING G. XU, 5 AND MICHAEL C. HEAVEN2 1Systems Management and Production Center, The University of Alabama in Huntsville, Huntsville, AL 35899, USA 2Department of Chemistry, Emory University, Atlanta, GA 30322, USA 3Space and Missile Defense […]
Energetics and dynamics of Coulomb explosion of highly charged clusters
Isidore Last, Israel Schek, and Joshua Jortner School of Chemistry, Tel Aviv University, Ramat Aviv 69978, Tel Aviv, Israel ~Received 27 March 1997; accepted 24 July 1997! Ultrafast femtosecond Coulomb explosion of charged homogeneous (Xen) and heterogeneous doped (HIArn) small and medium sized clusters (n,60) is studied resting on the picture of a vertical high-order […]
Unexpected Xe anions in XeLin intermetallic compounds
Zhen Liu1,2, Jorge Botana3,2, Maosheng Miao2,3 and Dadong Yan1 1 Department of Physics, Beijing Normal University – Beijing 100875, PRC 2 Department of Chemistry and Biochemistry, California State University Northridge Northridge, CA 91330, USA 3 Beijing Computational Science Research Center – Beijing 100086, PRC received 16 November 2016; accepted in final form 24 February 2017 […]