A nuclear spin-based 129Xe and 131Xe using optical polarization

Binquan Zhou; Linlin Chen; Guanqun Lei; Wei Quan; Xiaofeng Meng; Jiancheng Fang

doi:10.1117/12.2202830

8 October 2015 A nuclear spin-based ¹²⁹Xe and ¹³¹Xe using optical polarization

Binquan Zhou, Linlin Chen, Guanqun Lei, Wei Quan, Xiaofeng Meng, Jiancheng Fang

Proceedings Volume 9677, AOPC 2015: Optical Test, Measurement, and Equipment; 96772G (2015) https://doi.org/10.1117/12.2202830
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

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.

Citation Download Citation

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); https://doi.org/10.1117/12.2202830

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