This title appears in the Scientific Report :
2016
Please use the identifier:
http://dx.doi.org/10.1016/j.jmr.2016.02.011 in citations.
HP-Xe to go: Storage and transportation of hyperpolarized $^{129}$Xenon
HP-Xe to go: Storage and transportation of hyperpolarized $^{129}$Xenon
Recently the spin–lattice relaxation time T1 of hyperpolarized (HP)-129Xe was significantly improved by using uncoated and Rb-free storage vessels of GE180 glass. For these cells, a simple procedure was established to obtain reproducible wall relaxation times of about 18 h. Then the limiting relaxat...
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Personal Name(s): | Repetto, M. |
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Zimmer, S. / Allmendinger, F. / Blümler, P. (Corresponding author) / Doll, M. / Grasdijk, J. O. / Heil, W. / Jungmann, K. / Karpuk, S. / Krause, H.-J. / Offenhäusser, A. / Schmidt, U. / Sobolev, Y. / Willmann, L. | |
Contributing Institute: |
JARA-FIT; JARA-FIT Bioelektronik; PGI-8 |
Published in: | Journal of magnetic resonance, 265 (2016) S. 197 - 199 |
Imprint: |
Amsterdam [u.a.]
Elsevier
2016
|
PubMed ID: |
26927028 |
DOI: |
10.1016/j.jmr.2016.02.011 |
Document Type: |
Journal Article |
Research Program: |
Controlling Configuration-Based Phenomena |
Publikationsportal JuSER |
Recently the spin–lattice relaxation time T1 of hyperpolarized (HP)-129Xe was significantly improved by using uncoated and Rb-free storage vessels of GE180 glass. For these cells, a simple procedure was established to obtain reproducible wall relaxation times of about 18 h. Then the limiting relaxation mechanism in pure Xe is due to the coupling between the nuclear spins and the angular momentum of the Xe–Xe van-der-Waals-molecules. This mechanism can be significantly reduced by using different buffer gases of which CO2 was discovered to be the most efficient so far. From these values, it was estimated that for a 1:1 mixture of HP-Xe with CO2 a longitudinal relaxation time of about 7 h can be expected, sufficient to transport HP-Xe from a production to a remote application site. This prediction was verified for such a mixture at a total pressure of about 1 bar in a 10 cm glass cell showing a storage time of T1 ≈ 9 h (for View the MathML source h) which was transported inside a magnetic box over a distance of about 200 km by car. |