Dynamic nuclear polarization of 19F in LaF3 nanoparticles dispersed in an ethanol matrix containing a polarizing agent for polarized target applications. (29th March 2019)

• Record Type: Journal Article
• Authors: Miura, D; Iwata, T; Kaneko, D; Miyachi, Y; Nukazuka, G; Wauke, H
• Is Part Of: Progress of theoretical and experimental physics. Volume 2019:Number 3(2019)
• Publication Date: 2019-03-29
• Subjects: D50; Physics -- Periodicals; Mathematical physics -- Periodicals; 530.05
• DOI: 10.1093/ptep/ptz011
• Languages: English
• ISSNs: 2050-3911

Abstract

Abstract: The polarization enhancement of $\rm ^{19}F$ in $\rm LaF_{3}$ nanoparticles by dynamic nuclear polarization was investigated. A sample was prepared with nanoparticles that were produced by mechanical milling and dispersed in an ethanol matrix containing a free radical, 2, 2, 6, 6, -Tetramethyl-1-piperidinyloxy. At a magnetic field of 2.5 T and temperature of 0.9 K, $\rm ^{19}F$ polarizations of $2.9\%$ and $-3.0\%$ were achieved. The observed polarizations are about 2/3 as high as those for $\rm ^{1}H$ in ethanol. This method can be applied for polarizing various nuclei in other materials, thus allowing a wide range of applications for polarized nuclear targets.