This paper describes the experimental application of long single pulses to strongly inhomogeneously broadened NQR spectral lines, where the pulse length significantly exceeds the transverse relaxation time. A⁶³Cu NQR resonance in the mineral covellite (CuS) was used as an exemplar for study in this specific regime, which was motivated by the requirement to obtain useful signals in very large volume applications having radiofrequency power limitations. In this study, signal transients that followed the application of the long single pulses were measured over a large range of radiofrequency field strength and pulse width. The results indicate effective generation of signal amplitudes. This is in contrast to previously reported studies involving long pulses applied to relatively narrow resonances. The results are found to be well described by simulations of the modified Bloch equations.

本文描述了长单脉冲在强烈不均匀展宽的 NQR 谱线中的实验应用，其中脉冲长度显着超过横向弛豫时间。⁶³ _矿物铜蓝 (CuS) 中的 Cu NQR 共振被用作在该特定方案中研究的示例，其动机是需要在具有射频功率限制的超大体积应用中获得有用信号。在这项研究中，在大范围的射频场强度和脉冲宽度上测量了施加长单脉冲后的信号瞬变。结果表明信号幅度的有效生成。这与先前报道的涉及应用于相对窄共振的长脉冲的研究形成对比。发现结果可以通过修改后的布洛赫方程的模拟得到很好的描述。