MEASUREMENT IN-SITU FOR OPTICAL PROPERTIES OF SAMPLES EXPOSED TO ATOMIC OXYGEN BEAMS
 
                 
                
                    
                                        
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Graphical Abstract
 
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Abstract
    Optical properties of samples produced changes after exposed to atomic oxygen beams or ultraviolet in vacuum,but reflectivity of samples could recovery more or less in-air because of "colour center" vanishing of pigment in samples,so optical properties of samples need to be measured in-situ.
 
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