Nuclear polarization of /sup 129/Xe by spin-exchange with /sup 87/Rb
Nuclear polarization of /sup 129/Xe in the presence of /sup 87/Rb vapor, N/sub 2/ and He buffer gases has been studied. The /sup 129/Xe nuclei are polarized via spin-exchange collisions with optically oriented /sup 87/Rb. Longitudinal relaxation of the /sup 129/Xe nuclear polarization has been measured for the first time by optically monitoring the re-orientation of /sup 87/Rb electronic spin produced in spin-exchange collisions with /sup 129/Xe. In agreement with earlier studies, the relaxation has been found to be dependent on buffer gas concentration. In addition, it has been found that the relaxation is dependent on the external magnetic field intensity. The magnetic field dependence of the relaxation is consistent with spin-exchange occurring in RbXe Van der Waals molecules, and indicates that less relaxation occurs in binary collision processes than previously thought. Absolute measurements of the re-orientation of /sup 87/Rb indicate further that the ratio of spin orbit coupling, ..cap alpha..N, to spin-exchange coupling, ..gamma.., in the RbXe molecule is large: 3 less than or equal to ..cap alpha..N/..gamma.. less than or equal to 30.
- Research Organization:
- Columbia Univ., New York (USA)
- OSTI ID:
- 6181780
- Country of Publication:
- United States
- Language:
- English
Similar Records
Rb- sup 129 Xe spin-exchange rates due to binary and three-body collisions at high Xe pressures
High-field measurement of the {sup 129}Xe-Rb spin-exchange rate due to binary collisions
Related Subjects
A=90-149
Experimental-- Moments & Spin-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BUFFERS
COUPLING
DATA
DAYS LIVING RADIOISOTOPES
ELEMENTS
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FLUIDS
GASES
HELIUM
INFORMATION
INTERMEDIATE COUPLING
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
L-S COUPLING
MAGNETIC FIELDS
NITROGEN
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ORIENTATION
QUANTITY RATIO
RADIOISOTOPES
RARE GASES
RELAXATION TIME
RUBIDIUM 87
RUBIDIUM ISOTOPES
SPIN EXCHANGE
SPIN ORIENTATION
STABLE ISOTOPES
XENON 129
XENON ISOTOPES
YEARS LIVING RADIOISOTOPES