Accession Number : ADA131546

Title :   Nuclear Moment Alignment, Relaxation and Detection Mechanisms.

Descriptive Note : Final technical rept. Mar 82-Feb 83,

Corporate Author : LITTON SYSTEMS INC WOODLAND HILLS CA GUIDANCE AND CONTROL SYSTEMS DIV

Personal Author(s) : Nicol,Ann T ; Lam,Leo ; Boley,W

PDF Url : ADA131546

Report Date : Mar 1983

Pagination or Media Count : 95

Abstract : The reported physics research is part of an overall program to develop a nuclear magnetic resonance gyro that makes use of an optically pumped alkali metal vapor both to align the magnetic moments of the noble gas nuclei and to detect the weak magnetic fields that are generated by these precessing nuclear moments. A model for the distribution of polorization of optically pumped rubidium across a sample cell is developed. Results of the computer modeling are presented graphically for various cells as a function of cell size, incident light intensity, wall type and gas fill. A study of the effect of direct nuclear dipole-dipole interaction on surface relaxation of 129Xe is reported. Results indicate that the mechanism for 129Xe nuclear relaxation on surfaces studied is not the direct dipolar interaction and must be attributed to an electron-nucleus interaction. Studies of 129Xe relaxation on several surface types show an order of magnitude more efficient than silicone treated surfaces for relaxing xenon nuclear spins.

Descriptors :   *Gyroscopes, *Nuclear magnetic resonance, *Nuclear moments, *Alignment, Optical pumping, Rubidium, Mathematical models, Theory, Relaxation, Frequency shift, Rare gases, Alkali metals

Subject Categories : Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE