| Physics of Spin-Polarized Media |
06 Mar 2011 |
12 pages |
| Authors:
William Happer; PRINCETON UNIV NJ DEPT OF PHYSICS
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 | The work supported by this AFOSR grant during the past year was focused on the fundamental physics and the applications of spin polarized species. The most notable accomplishments of the past year were: (1) basic work basic physics needed to transform gas-cell atomic clocks based on optically-pumped alkali-metal atoms from secondary frequency standards to primary frequency standards; (2) completion of studies of optical pumping and magnetic resonances of spin-polarized metastable ... |
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| Physics of Spin-Polarized Media |
21 NOV 2007 |
10 pages |
| Authors:
William Happer; Yuan-Yu Jau; PRINCETON UNIV NJ
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| The work supported by this AFOSR grant focused on fundamental physics and the applications of spin-polarized species. Some of the most notable accomplishments were as follows: (1) using optically pumped alkali-metal vapor to polarize the nuclei of solid materials; (2) making much simpler atomic clocks with the physics of push-pull optical pumping, an efficient new pumping method that the authors discovered during the course of the grant; (3) nonlinear "pressure ... |
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| Accumulation of Large Amounts of Hyperpolarized Xe-129 & Applications to Xe-129 Spectroscopy |
15 Jan 2007 |
11 pages |
| Authors:
William Happer; PRINCETON UNIV NJ DEPT OF PHYSICS
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| We have studied the physics underlying the production, accumulation, and cryogenic separation of hyperpolarized xenon-129. This research has led to a dramatically improved understanding of the physics behind nuclear relaxation in solid xenon and resolved long-standing discrepancies between theoretical predictions and experimental observation. The information gained from these experiments allowed us to produce greater quantities of hyperpolarized 129Xe with higher nuclear polarization. This in turn permitted us to begin cutting-edge ... |
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