^(23)Na relaxometry: An overview of theory and applications  

作　　者：Yifan Song Yu Yin Qinlong Chen Alessandro Marchetti Xueqian Kong 

机构地区：[1]Key Laboratory of Excited-State Materials of Zhejiang Province,Department of Chemistry,Zhejiang University,Hangzhou,Zhejiang,310027,China [2]Department of Physical Medicine and Rehabilitation,Sir Run Run Shaw Hospital,Zhejiang University,Hangzhou,Zhejiang,310016,China [3]Institute of Translational Medicine,Shanghai Jiao Tong University,Shanghai,200240,China

出　　处：《Magnetic Resonance Letters》2023年第2期150-174,I0004,共26页磁共振快报（英文）

基　　金：National Natural Science Foundation of China 22275159 and 22072133.Leading Innovation and Entrepreneurship Team of Zhejiang Province 2020R01003.

摘　　要：^(23)Na is a nuclear magnetic resonance(NMR)-active isotope with a nuclear spin quantum number of 3/2.^(23)Na relaxation phenomenon is at the core of ^(23)Na NMR measurement and analysis.Due to the dominance of quadrupolar interaction,the relaxation behavior of ^(23)Na is physically and mathematically more complex than that of a typical spin-1/2 isotope.In this review,we overview the semi-classical Redfield theory for deriving the formulations of ^(23)Na relaxation.We show that the relaxation behaviors of ^(23)Na can be quantitatively described by constructing the spectral density functions based on the second-order perturbation theory.In addition,we summarize the applications of ^(23)Na relaxometry in different research fields,including biomedicine,sodium ion batteries,and quantum information processing.Because sodium is an essential element in our body,food and industrial materials,the research on sodium by ^(23)Na NMR emerges as important future directions.The theoretical and practical understandings on ^(23)Na relaxation are the step stones for mastering advanced ^(23)Na NMR techniques.

关 键 词：^(23)Na relaxation Quadrupolar interactions Redfield theory Biological systems Sodium ion batteries Quantum information processing 

分 类 号：O469[理学—凝聚态物理]