The Quest for efficient Signal Amplification By Reversible Exchange of parahydrogen (SABRE) continues: With alt-SABRE-SHEATH, where an ultra-low magnetic field alternates between 1 μT and 50 μT, the polarization evolution starts at strong (1 μT) and continues at weak coupling conditions (50 μT) with a frequency rate of the 0th order quantum coherence. Using this effect, ¹⁵N-polarization is experimentally boosted by 30 %.

中文翻译：

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通过两个交替场的可逆交换实现信号放大的相干演化 (alt-SABRE)

对通过仲氢可逆交换 (SABRE) 进行高效信号放大的探索仍在继续：使用 alt-SABRE-SHEATH，其中超低磁场在 1 μT 和 50 μT 之间交替，极化演化从强 (1 μT) 开始并继续在弱耦合条件下（50 μT），频率为 0 阶量子相干。使用这种效应，¹⁵ N 极化在实验上提高了 30%。