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8 October 2015 A nuclear spin-based 129Xe and 131Xe using optical polarization
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Proceedings Volume 9677, AOPC 2015: Optical Test, Measurement, and Equipment; 96772G (2015)
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China
We present a design for a spin-exchange optical pumping system to produce large quantities of highly polarized 129Xe and 131Xe. Low xenon concentrations in the flowing gas mixture which allow the laser to maintain high Cs polarization. The large spin-exchange rate between Cs and Xe through the long-lived van der Waals molecules at low pressure, combined with a high flow rate, results in large production rates of hyperpolarized xenon. The fast rates make it possible to obtain large nuclear polarizations after several minutes of optical pumping with a laser.At high Xe pressures. According to the theory, the longitudinal spin-elaxation rate 1T1 of Xe in a high-pressure sample containing only Xe and Cs vapor has the simple form is the velocity averaged binary spin-exchange cross section, It is the relaxation rate due to wall collisions and perhaps magnetic field inhomogeneities. Our results complement earlier studies performed at 129Xe pressures of about 20 Torr and 131Xe pressures of about 20 Torr and N2 pressures of 600 Torr . This work is useful for predicting spin-exchange rates between polarized Cs atoms and Xe nuclei.
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Binquan Zhou, Linlin Chen, Guanqun Lei, Wei Quan, Xiaofeng Meng, and Jiancheng Fang "A nuclear spin-based 129Xe and 131Xe using optical polarization", Proc. SPIE 9677, AOPC 2015: Optical Test, Measurement, and Equipment, 96772G (8 October 2015);

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