Research Investigation Directed Toward Extending the Useful Range of the Electromagnetic Spectrum
Abstract
A theoretical limit, (Omega squared)/(Omega)hfs, has been deduced for the exchange narrowed linewidth of magnetic resonance transitions in alkali vapors. Here omega is the Larmor frequency and (Omega)hfs is the hyperfine frequency of the atomic ground state. Experimentally measured linewidths do not approach this limit. The reason for the discrepancy is under investigation. Long range interactions were found to exist between self focused, spatially separated laser beams in alkali vapors. These forces were shown to be due to the exchange of spin-polarized atoms. A simple optically pumped device has been developed for visual, real-time display of contours of constant magnetic field in a region of inhomogeneous magnetic field. The same device can be used as an unconventional frequency spectrum analyzer for the radio frequency or microwave range. Both Cs2 and Rb2 molecules, when excited by certain lines of an Ar(+) laser, lead to the formation of alkali hydride crystals when hydrogen is mixed with the alkali vapor. No isotopic selectivity could be demonstrated in the case of laser excitation of Rb2.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1977
- Accession Number
- ADA049470
Entities
People
- William Happer
Organizations
- Columbia University