有两种弛豫时间，一种是自旋-晶格弛豫时间（spin-lattice relaxationtime）又称纵向弛豫时间（longitudinal relaxation time）反映自旋核把吸收的能传给周围晶格所需要的时间，也是90°射频脉冲质子由纵向磁化转到横向磁化之后再恢复到纵向磁化激发前状态所需...
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The result shows that sag resistances of the tubing resins have a close relationship with NMR relaxation properties. Resins with longer longitudinal relaxation time possess better sag resistances.
管材树脂的抗熔垂性能与其核磁迟豫特性紧密相关，好的抗熔垂性能对应更长的纵向迟豫时间。
There are two types of relaxation: longitudinal relaxation, which is the time (T1) needed to align protons in a static magnetic field;
有两种类型的驰豫：纵向驰豫，静磁场中质子定向排列所需的时间T1；
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