Now showing items 31-34 of 34
A spin-polarized He (2³S₁) metastable atom source for surface research
Surface science has a paucity of probes, particularly for spin-dependent studies. This thesis describes a 2 3S1 He probe, recently developed in this laboratory, that can be used for such investigations. There are three ...
Spectra of dense helium excited by electron impact
This is an account of the visible and near infrared spectrum of dense helium excited by 160keV electrons. It has been suspected that metastable helium atoms are involved in production of strong 02 and N2 spectra when ...
3.4 centimeter cyrogenic parametric amplifier system for radio astronomy
A low-noise microwave receiver was designed and fabricated to provide the necessary sensitivity to detect the helium 3 line. In order to achieve ultra-low noise amplification in the input states of this receiver, cascaded ...
Optical pumping dynamics and spin relaxation in gaseous He_
The first part of this investigation is concerned with the dynamics of the optical polarization process in He3 gas subjected to an electrical discharge. The characteristic time for the build-up of polarization under the ...