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Enhancement of Xe-129 polarization by off-resonant spin exchange optical pumping

Parnell, S.R., Deppe, M.H., Parra-Robles, J. and Wild, J.M. (2010) Enhancement of Xe-129 polarization by off-resonant spin exchange optical pumping. Journal of Applied Physics, 108 (6). Art no.064908 . ISSN 0021-8979

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A high power narrow line width (38 W, 0.09 nm full width at half maximum) external cavity diode laser is investigated for rubidium spin exchange optical pumping of Xe-129. This tunable photon source has a constant line width, independent of operating power or wavelength within a 1 nm tuning range. When using this laser, an increase in the Xe-129 nuclear polarization is observed when optically pumping at a lower wavelength than the measured Rb electron D-1 absorption. The exact detuning from D1 for the highest polarization is dependent upon the gas density. Furthermore, at high power and/or high Rb density, a reduction in the polarization occurs at the optimum wavelength as previously reported in spin exchange optical pumping studies of He-3 which is consistent with high absorption close to the cell front face. These results are encouraging for moderate high throughput polarization of Xe-129 in the midpressure range of (0.5-2.0 amagat). (C) 2010 American Institute of Physics. [doi: 10.1063/1.3478707]

Item Type: Article
Copyright, Publisher and Additional Information: © 2010 American Institute of Physics. This is an author produced version of a paper subsequently published in Journal of Applied Physics. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: Laser-Diode Arrays; Hyperpolarized XE-129; NMR-Spectroscopy; HE-3; Cells; RB; Nuclei; MRI
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Medicine, Dentistry and Health (Sheffield) > School of Medicine (Sheffield)
Depositing User: Miss Anthea Tucker
Date Deposited: 01 Dec 2010 15:18
Last Modified: 08 Feb 2013 17:29
Published Version: http://dx.doi.org/10.1063/1.3478707
Status: Published
Publisher: American Institute of Physics
Refereed: Yes
Identification Number: 10.1063/1.3478707
URI: http://eprints.whiterose.ac.uk/id/eprint/42689

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