Accession Number : ADA292511

Title :   The Physics of Spin Polarized Gases.

Descriptive Note : Final technical rept. 1 Apr 92-31 Aug 94,

Corporate Author : PRINCETON UNIV NJ DEPT OF PHYSICS

Personal Author(s) : Cates, Gordon D.

PDF Url : ADA292511

Report Date : 15 JAN 1995

Pagination or Media Count : 8

Abstract : Most of our research was connected either directly or indirectly to the study of spin polarized atoms and nuclei, and their applications. In most cases we used lasers to optically pump, and hence polarize, alkali-metal vapors. Spin-exchange collisions were used to transfer the angular momentum to other systems. Of particular interest was our continuing study of the polarization of noble gas nuclei, which are characterized by extremely long spin relaxation times of minutes to many days. During this past research period we have demonstrated several applications of polarized noble gas nuclei that may have important implications for such diverse areas as non-destructive testing and medical diagnostics, as well as many areas in fundamental research. Of particular note is the use of spin-exchange polarized 3He and (129)Xe for magnetic resonance imaging. At present, our imaging work has focused on the lungs of small animals such as mice and guinea pigs. We believe, however, that our technique would also be useful for non-destructive testing. We have also continued our study of Xe that is polarized in the gaseous state, and subsequently frozen. This novel technique for producing a highly polarized solid has received considerable attention in the NMR community. jg p.3

Descriptors :   *POLARIZATION, *GASES, *PHYSICS, *SPIN STATES, LASER PUMPING, OPTICS, NONDESTRUCTIVE TESTING, VAPORS, ATOMS, SOLIDS, MAGNETIC RESONANCE, DIAGNOSIS(MEDICINE), IMAGES, LUNG, ANIMALS, HELIUM, RELAXATION TIME, MICE, XENON, COLLISIONS, ANGULAR MOMENTUM, NUCLEI, ALKALI METALS, GUINEA PIGS, RARE GASES.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Radiation and Nuclear Chemistry
      Atomic and Molecular Physics and Spectroscopy
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE