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    • 5. 发明授权
    • Method of and apparatus for nuclear quadrupole resonance testing a sample, and pulse sequence for exciting nuclear quadrupole resonance
    • 用于核四极共振测试样品的方法和装置以及用于激发核四极共振的脉冲序列
    • US06208136B1
    • 2001-03-27
    • US08916374
    • 1997-08-22
    • John Alec Sydney SmithNeil Francis Peirson
    • John Alec Sydney SmithNeil Francis Peirson
    • G01V300
    • G01R33/441
    • A method of nuclear quadrupole resonance testing a sample comprising a first type substance containing quadrupolar nuclei and a second type substance which may give rise to spurious signals which interfere with response signals from the quadrupolar nuclei, comprises applying a pulse sequence to the sample to excite nuclear quadrupole resonance, the pulse sequence comprising at least one pair of pulses; detecting response signals; and comparing, for the or each such pair, the respective response signals following the two member pulses of the pair, the pulse sequence being such that the respective spurious signals following the two member pulses can be at least partially cancelled by the comparison without the corresponding true quadrupole resonance signals being completely cancelled; and for the or each such pair, the two member pulses being of like phase.
    • 核四极共振测试包含含有四极核的第一类物质的样品和可能产生干扰来自四极核的响应信号的寄生信号的第二类物质的方法包括向样品施加脉冲序列以激发核 四极共振,所述脉冲序列包括至少一对脉冲; 检测响应信号; 并且对于所述对或每个这样的对,对于所述对中的两个成员脉冲之后的相应响应信号,所述脉冲序列使得在两个成员脉冲之后的相应寄生信号可以至少部分地通过比较来抵消,而没有相应的 真正的四极杆共振信号被完全取消; 并且对于这些或每个这样的对,两个成员脉冲具有相位相同。