Accession Number : AD0711546

Title :   RESEARCH INVESTIGATION DIRECTED TOWARD EXTENDING THE USEFUL RANGE OF THE ELECTROMAGNETIC SPECTRUM.

Descriptive Note : Progress rept. no. 20, 1 Sep 69-30 Jun 70,

Corporate Author : COLUMBIA RADIATION LAB NEW YORK

Personal Author(s) : Hartmann,Sven R.

Report Date : 30 JUN 1970

Pagination or Media Count : 82

Abstract : New measurements of a number of basic atomic properties have been obtained. These include gF values for the autoionizing quartet states of rubidium, lifetimes of the autoionizing quartet states of helium, and the hyperfine constants and lifetimes of excited P states of lithium. Preliminary phases of an experiment to study electron excitation of atoms by a coincidence technique have been successfully tested. Work in molecular spectroscopy has been expanded. An optically pumped Rb85 maser is now within 1 dB of oscillation on the field-independent 3035.73... MHz transition. Photon-echo amplitudes in ruby have been measured as a function of excitation pulse separation, and the preliminary results are in agreement with theory. The Raman echo apparatus has been improved by the construction of a ceramic heat-pipe oven to contain the T1 vapor and the installation of a 300 MW laser.

Descriptors :   (*ATOMIC SPECTROSCOPY, REPORTS), (*MOLECULAR SPECTROSCOPY, REPORTS), (*SOLID STATE PHYSICS, REPORTS), MICROWAVE SPECTROSCOPY, STARK EFFECT, EXCITATION, ATOMIC ENERGY LEVELS, MOLECULAR SPECTROSCOPY, IONIZATION, SURFACES, RUBY, NONLINEAR SYSTEMS, MASERS, STANDARDS, HYDROGEN, HELIUM, CESIUM

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE