{sup 3}He polarization-dependent EPR frequency shifts of alkali-metal-{sup 3}He pairs

Journal Article · Sat Jan 01 04:00:00 EST 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.71.013414· OSTI ID:20650267

Babcock, Earl; Walker, Thad G ^[1]; Nelson, Ian A ^[2]; Kadlecek, Steve ^[3]

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1. Department of Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States)
2. Department of Human Oncology, University of Wisconsin Medical School, Madison, Wisconsin 53792 (United States)
3. Department of Radiology, University of Pennsylvania, Philadelpia, Pennsylvania 19104 (United States)

We present temperature-dependent measurements of the EPR frequency shifts for Na, K, and Rb interacting with polarized {sup 3}He. K and Na frequency shifts were measured via comparison with Rb frequency shifts (well known at low temperatures) in Na-Rb-{sup 3}He and K-Rb-{sup 3}He spin-exchange cells. The lowered Rb vapor pressure of these 'hybrid' spin-exchange cells also allowed us to extend the measured temperature dependence of the Rb EPR frequency shifts up to 350 deg. C. This work presents measurements of the EPR frequency shift for Na in {sup 3}He and significantly extends the temperature range of previous Rb and K EPR frequency shift measurements. These results are critical to the performance of accurate {sup 3}He EPR polarimetry in spin-exchange cells.

• OSTI ID: 20650267
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 1 Vol. 71; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
COMPARATIVE EVALUATIONS
ELECTRON SPIN RESONANCE
HELIUM 3
PERFORMANCE
POLARIMETRY
POLARIZATION
POTASSIUM
RUBIDIUM
SODIUM
SPIN EXCHANGE
TEMPERATURE DEPENDENCE
VAPOR PRESSURE