该现象是由薄膜中金属超微粒子内费米能级附近电子被飞秒激光脉冲激发所产生的非平衡态电子经历瞬态弛豫造成的。
The optical relaxation is a process in which nonequilibrium electrons, excited by laser pulses and originating from near Fermi level in Cu ultrafine particles, return to the equilibrium state.
利用脉冲梯度场核磁共振技术（PFG-NMR）研究蔗糖对面团自旋-自旋弛豫特性的影响。
We researched the effects of sucrose on the spin- spin relaxation property in dough using pulsed field gradient Nuclear Magnetic Resonance ( PFG- NMR) techniques.
分析表明，交叉弛豫随激发场强度增大，并导致偏振因子随激发场入射脉冲面积减小。
It was revealed that the cross relaxation increased with intensity of the excitation, which resulted in the decrease of polarization factor with the input pulse area.
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