Measurement of Photoabsorption of the Lithium Halides Near the Lithium<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>K</mml:mi></mml:math>Edge

Abstract

I'EBRUARY 1/68 second type consists of mobile damage centers which congregate along existing imperfections.The first type can be either microscopically reversible or irreversible.As there is no ev- idence from our measurements that the dam- age in KDP extends beyond the unit-cell level it is classified as microscopically reversible local damage.This type is not expected to have as great a tendency to clamp existing domain structure into a crystal during irradiation.This is consistent with our ability to reverse the polarization.In addition there would be no tendency for the damage to internally biasthe crystal.Of course, nonparamagnetic dam- age centers cannot be detected in our experiment and if these exist they may have an ad- ditional influence on the ferroelectric proper- ties of the irradiated crystal.