Optical pumping
W Happer - Reviews of modern physics, 1972 - APS
Optical pumping of ground-state and metastable atoms and ions is reviewed. We present a
critical survey of the literature on pumping mechanisms, light propagation, relaxation …
critical survey of the literature on pumping mechanisms, light propagation, relaxation …
Spin-exchange optical pumping of noble-gas nuclei
TG Walker, W Happer - Reviews of modern physics, 1997 - APS
Spin-exchange optical pumping of mixtures of alkali-metal vapors and noble gases can be
used to efficiently polarize the nuclei of the noble-gas atoms. Liters of noble gases at …
used to efficiently polarize the nuclei of the noble-gas atoms. Liters of noble gases at …
Polarization of the nuclear spins of noble-gas atoms by spin exchange with optically pumped alkali-metal atoms
W Happer, E Miron, S Schaefer, D Schreiber… - Physical Review A, 1984 - APS
The theory of spin exchange between optically pumped alkali-metal atoms and noble-gas
nuclei is presented. Spin exchange with heavy noble gases is dominated by interactions in …
nuclei is presented. Spin exchange with heavy noble gases is dominated by interactions in …
Effective operator formalism in optical pumping
W Happer, BS Mathur - Physical Review, 1967 - APS
Real and virtual absorption of weak monochromatic light is analyzed with semiclassical
radiation theory. The influence of the light on the atoms is described by an effective ground …
radiation theory. The influence of the light on the atoms is described by an effective ground …
Biological magnetic resonance imaging using laser-polarized 129Xe
MS Albert, GD Cates, B Driehuys, W Happer, B Saam… - Nature, 1994 - nature.com
As currently implemented, magnetic resonance imaging (MRI) relies on the protons of water
molecules in tissue to provide the NMR signal. Protons are, however, notoriously difficult to …
molecules in tissue to provide the NMR signal. Protons are, however, notoriously difficult to …
Effect of rapid spin exchange on the magnetic-resonance spectrum of alkali vapors
W Happer, AC Tam - Physical Review A, 1977 - APS
It was recently discovered that when there are sufficiently rapid spin-exchange collisions in
an alkali-metal vapor, the rf magnetic-resonance frequency of the ground-state atoms …
an alkali-metal vapor, the rf magnetic-resonance frequency of the ground-state atoms …
[BOOK][B] Optically pumped atoms
W Happer, YY Jau, T Walker - 2010 - books.google.com
Covering the most important knowledge on optical pumping of atoms, this ready reference is
backed by numerous examples of modelling computation for optical pumped systems. The …
backed by numerous examples of modelling computation for optical pumped systems. The …
Relaxation of spins due to field inhomogeneities in gaseous samples at low magnetic fields and low pressures
GD Cates, SR Schaefer, W Happer - Physical review A, 1988 - APS
We have developed a theory for the effect of magnetic-field inhomogeneities on the spin
relaxation of gases in cells with negligible relaxation at the walls. There is a characteristic …
relaxation of gases in cells with negligible relaxation at the walls. There is a characteristic …
Theory of spin-exchange optical pumping of and
…, CJ Erickson, MV Romalis, AR Young, W Happer - Physical review A, 1998 - APS
We present a comprehensive theory of nuclear spin polarization of 3 He and 129 Xe gases
by spin-exchange collisions with optically pumped alkali-metal vapors. The most important …
by spin-exchange collisions with optically pumped alkali-metal vapors. The most important …
High‐volume production of laser‐polarized 129Xe
…, E Miron, K Sauer, DK Walter, W Happer - Applied Physics …, 1996 - pubs.aip.org
A method is described for producing several liters of nuclear spin polarized 129Xe gas via
spin exchange with an optically pumped Rb vapor. We use a 140 W AlGaAs laser diode …
spin exchange with an optically pumped Rb vapor. We use a 140 W AlGaAs laser diode …