NMR calibration of optical measurement of nuclear polarization in [sup 3]He

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.47.468· OSTI ID:7118910

Lorenzon, W; Gentile, T R; Gao, H; McKeown, R D ^[1]

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1. W.K. Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125 (United States)

We have performed precise NMR measurements in order to calibrate a standard optical technique for measuring the polarization of [sup 3]He nuclei. This optical technique requires knowledge of the pressure-dependent relationship between the nuclear polarization and the degree of circular polarization of the 668-nm light emitted from a [sup 3]He discharge. We determined the nuclear polarization by comparing the adiabatic fast-passage NMR signal from samples of polarized [sup 3]He at pressures between 0.1 and 5 torr to an identical sample of water. For water, the polarization is known from statistical mechanics. The [sup 3]He is polarized using the metastability exchange technique for optical pumping of [sup 3]He. The accuracy of the calibration is [plus minus]2%, which is required for applications in nuclear physics.

• OSTI ID: 7118910
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 47:1; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664400* -- Experimentally Derived Information on Atomic & Molecular Properties-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
CALIBRATION
EVEN-ODD NUCLEI
HELIUM 3
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
MEASURING METHODS
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ORIENTATION
POLARIZED TARGETS
RESONANCE
SPIN ORIENTATION
STABLE ISOTOPES
TARGETS
YIELDS