It was shown that doping a crystal with In3+ reduced its sensitivity to X-rays. Optical and X-ray experiments led to the conclusion that this was due to a change in the impurity-center structure. It was proved experimentally that mechanical crushing resulted in transformation of the luminescent centers. This did not permit effective conversion of the centers under synchrotron radiation.

Transformation of the Luminescent Centers in KCl:In Crystals under Synchrotron Radiation. K.E.Gyunsburg, N.P.Zvezdova, V.I.Kochubey, Y.G.Sedova: Nuclear Instruments and Methods in Physics Research A, 2000, 448[1-2], 483-6