High-field measurement of the {sup 129}Xe-Rb spin-exchange rate due to binary collisions

Journal Article · Fri Nov 01 04:00:00 EST 2002 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.66.052710· OSTI ID:20632300

Jau, Y -Y; Kuzma, Nicholas N; Happer, William ^[1]

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1. Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States)

We have measured the binary spin-exchange rate coefficient for collisions between Rb and {sup 129}Xe atoms at a magnetic field B=9.4 T and in the temperature range 160<T<200 deg. C. The longitudinal spin-relaxation rate 1/T{sub 1} of {sup 129}Xe is dominated by {sup 129}Xe-Rb binary collisions. We measured 1/T{sub 1} using the methods of conventional nuclear magnetic resonance, with no spin enhancement by optical pumping. At the high magnetic field and large gas pressures used in this work, the contribution of {sup 129}Xe-Rb molecules to the spin-exchange rate was less than 0.1% of the binary-collision rate. The Rb atomic number density [Rb] was measured directly from the large Faraday rotation of the polarization of near-resonant light passing through the sample cells. The rate coefficient is {kappa}=d(1/T{sub 1})/d [Rb]=(1.75{+-}0.12)x10{sup -16} cm{sup 3}/s.

• OSTI ID: 20632300
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 66; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOM-ATOM COLLISIONS
ATOMS
DENSITY
FARADAY EFFECT
MAGNETIC FIELDS
MOLECULES
NUCLEAR MAGNETIC RESONANCE
OPTICAL PUMPING
POLARIZATION
RELAXATION
RUBIDIUM
SPIN
SPIN EXCHANGE
TEMPERATURE RANGE 0065-0273 K
XENON
XENON 129