Three-field NMR to preserve hyperpolarized proton magnetization as long-lived states in moderate magnetic fields
Three-field NMR to preserve hyperpolarized proton magnetization as long-lived states in moderate magnetic fields
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DOI：
10.1016/j.cplett.2011.07.015
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发表时间：
2011-08-25
影响因子：
2.8
通讯作者：
Bodenhausen, Geoffrey
中科院分区：
文献类型：
--
作者：
Bornet, Aurelien;Jannin, Sami;Bodenhausen, Geoffrey
本文描述了一个三场实验，其中不等价的标量耦合自旋对在3.35T和1.2K被动态核极化(DNP)超极化，并迅速转移到高场(7T)以准备合适的初始条件，该初始条件通过穿梭到‘低’磁场(2mT-7T)而绝热地转变为长寿命态(LLS)。即使没有施加任何射频辐射来维持LLS，它在低场下也具有T-LLS；>；T-1的寿命。最后，样品被送回高场，在高分辨率条件下进行观察。(C)2011爱思唯尔B.V.保留所有权利。
This communication describes a three-field experiment where inequivalent scalar coupled spin pairs are hyperpolarized at 3.35 T and 1.2 K by dynamic nuclear polarization (DNP), rapidly transferred to high field (7 T) to prepare a suitable initial condition that is converted adiabatically into a long-lived state (LLS) by shuttling to a 'low' magnetic field (2 mT-7 T). Even without applying any rf irradiation to sustain the LLS, it has a lifetime T-LLS >> T-1 in low fields. Finally, the sample is shuttled back to high field for observation under high-resolution conditions. (C) 2011 Elsevier B. V. All rights reserved.