Stability enhancement of 129Xe hyperpolarizing system using alkali metal vapor in spin-exchange optical pumping cell to achieve high NMR sensitivity

Fujiwara, Hideaki; Imai, Hirohiko; Kimura, Atsuomi

Analytical Sciences, 2019, 35(8), 869-873

Number of Access:327（2025-09-04 12:44 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/88639

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Title
Stability enhancement of 129Xe hyperpolarizing system using alkali metal vapor in spin-exchange optical pumping cell to achieve high NMR sensitivity
Creator
NRID
1000090107102 1000090107102
CreatorName
Fujiwara, Hideaki
NRID
1000040506466 1000040506466
CreatorName
Imai, Hirohiko
NRID
1000070303972 1000070303972
researchmap permalink
osaka_kimura osaka_kimura
Scopus Author ID
7402712083 7402712083
ORCID
0000-0001-5702-276X 0000-0001-5702-276X
CreatorName
Kimura, Atsuomi
Subject
129Xe
Cell decay constant
Hyperpolarized
Nanofiber
NMR
Rb degradation
SN improvement
Abstract
Hyperpolarized (HP) 129Xe NMR and MRI have enabled 129Xe studies with extraordinarily enhanced sensitivity, stimulating new developments in magnetic resonance in chemistry, physics, biology and medicine. However, the standard method of HP 129Xe production inevitably demands Rb vapor for the excitation, which has made the method very sensitive to impurities such as water or oxygen. This is the case especially in the recirculating system. In the present study, stability of the hyperpolarizing system is discussed by proposing the "cell decay constant", which symbolizes the decay rate of the NMR signal obtained from the system. The cell decay constant is effectively decreased to 1/3 by introducing separated chambers and mechanical stirring of the alkali metals used in the system, making it effective for accumulating FIDs over 30 to 100 h. The newly developed hyperpolarizing system has been successfully applied for newly detecting a broad signal at 190 ppm with an industrial material Nanofiber.
Publisher
Japan Society for Analytical Chemistry
日本分析化学会
Source Title
Analytical Sciences
Volume (Issue)
35(8)
Page
869-873
Date of Issued
2019-08-10
Language
English
Handle URL
https://hdl.handle.net/11094/88639
PISSN
09106340
eISSN
13482246
NCID
AA12022210
AA10500785
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.2116/analsci.19P047
PMID
30982799
Access Rights
open access
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article