NaF晶体中23Na自旋声子耦合分离机制随温度和顺磁中心数的特性

IF 0.9 4区 物理与天体物理 Q4 ACOUSTICS
A. M. Rochev, V. M. Mikushev, E. V. Charnaya, A. Yu. Serov
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引用次数: 0

摘要

以宽温度范围内的NaF晶体为例,研究了核磁共振方法改变核自旋声子耦合效率的可能性。为了抑制涉及顺磁中心的核自旋-晶格弛豫,采用单拉莫尔频率的连续磁饱和代替双频23Na核磁共振信号的声饱和。研究了γ辐射诱导的色心和温度对自旋声子分离耦合机制的影响。在19F偶极子核中没有观察到杂质弛豫的抑制。结果表明,磁饱和完全或部分关闭四极核杂质弛豫的方法在商用脉冲核磁共振光谱仪上是可行的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Peculiarities of Separation of Spin–Phonon Coupling Mechanisms for 23Na in a NaF Crystal Depending on Temperature and the Number of Paramagnetic Centers

Peculiarities of Separation of Spin–Phonon Coupling Mechanisms for 23Na in a NaF Crystal Depending on Temperature and the Number of Paramagnetic Centers

The possibility of changing the efficiency of nuclear spin–phonon coupling by NMR methods using the example of a NaF crystal in a wide temperature range is investigated. To suppress nuclear spin-lattice relaxation involving paramagnetic centers, continuous magnetic saturation at a single Larmor frequency is used instead of acoustic saturation of the 23Na NMR signal at a double frequency. The influence of the (i) color centers induced by gamma irradiation and (ii) temperature on the separation of spin–phonon coupling mechanisms is studied. No suppression of impurity relaxation is observed for 19F dipole nuclei. It is shown that the suggested magnetic saturation technique for complete or partial shutdown of impurity relaxation of quadrupole nuclei can be implemented on commercial pulse NMR spectrometers.

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来源期刊
Acoustical Physics
Acoustical Physics 物理-声学
CiteScore
1.60
自引率
50.00%
发文量
58
审稿时长
3.5 months
期刊介绍: Acoustical Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It covers theoretical and experimental aspects of basic and applied acoustics: classical problems of linear acoustics and wave theory; nonlinear acoustics; physical acoustics; ocean acoustics and hydroacoustics; atmospheric and aeroacoustics; acoustics of structurally inhomogeneous solids; geological acoustics; acoustical ecology, noise and vibration; chamber acoustics, musical acoustics; acoustic signals processing, computer simulations; acoustics of living systems, biomedical acoustics; physical principles of engineering acoustics. The journal publishes critical reviews, original articles, short communications, and letters to the editor. It covers theoretical and experimental aspects of basic and applied acoustics. The journal welcomes manuscripts from all countries in the English or Russian language.
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