QUENCHING OF HELIUM AFTERGLOW BY INFRARED PHOTONS

15 August 1969

journal article
research article
Published by AIP Publishing in Applied Physics Letters

Vol. 15 (4) , 113-114
https://doi.org/10.1063/1.1652926

Abstract

The visible afterglow radiation from low‐pressure weakly ionized helium exhibits a partial quenching due to absorption of infrared photons (0.11–0.14 eV). The helium sample is placed in the cavity of a Q‐switched CO₂ laser and studied at gas temperatures in the range from 77 to 300°K. The partial quenching appears to originate from photon‐induced change of population of a state or states of a neutral or ionic helium molecule.

Keywords

This publication has 4 references indexed in Scilit:

Evidence of Low-Binding-Energy Electrons in a Low-Temperature Helium Afterglow
Physical Review Letters, 1968
Evidence of the Existence of an He3+ Ion
The Journal of Chemical Physics, 1968
Polarization of Neutrons from the $C^{13} (p, n_{0}) N^{13}$ and $N^{15} (p, n_{0}) O^{15}$ Reactions
Physical Review B, 1965
Mobilities and Reaction Rates of Ions in Helium
Physical Review B, 1965