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首页> 外文期刊>Zeitschrift fur Naturforschung. A, A journal of physical sciences >One Pulse Spin-locking in NQR
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One Pulse Spin-locking in NQR

机译：NQR中的一脉冲自旋锁定

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摘要

The response of a quadrupolar spin system in zero applied magnetic field to a long if pulse, for both single crystal and polycrystalline samples possessing broad Lorentzian-shaped resonance lines has been studied. The dependencies of magnetization on frequency offset, linewidth and power are investigated both theoretically and experimentally. The problem of the effective field direction in both single crystal and polycrystalline samples is also discussed. For a polycrystalline cuprous oxide (Cu_2O) sample it is observed that the magnetization after a long pulse in on-resonance condition does not become zero for time t T_2, in agreement with theoretical results. It has also been shown that the magnetization increases with increase in the width of the resonance line as well as with the decrease in the excitation power.
机译：对于具有宽洛伦兹形共振线的单晶和多晶样品，已经研究了在零施加磁场下四极自旋系统对长脉冲的响应。从理论上和实验上研究了磁化强度对频率偏移，线宽和功率的依赖性。还讨论了单晶和多晶样品中有效场方向的问题。对于多晶氧化亚铜（Cu_2O）样品，观察到在导通条件下长脉冲后的磁化强度在时间t T_2内不会变为零，这与理论结果一致。还已经表明，磁化强度随着谐振线宽度的增加以及激励功率的减小而增加。

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