暗恢复 meaning in English

dark reversion of pfr to pr

The intensity at the . irradiated site decreased linearly with the power density of the irradiation light . this means that the light - induced change is a one - photon process . irradiations at different wavelengths indicate that the spectral change is frequency - selective
暗恢复过程的研究表明，光辐照后光谱的强度有恢复到辐照前强度的趋势，拟合发现存在两个恢复常数，一个为2 . 5小时，另外一个特别长。