THE PROPERTY OF F_H(NCO^-) CENTER IN KCl

The property of the newly discovered F-aggregate center, F_H(NCO^-) center, was investigated. Several new peaks located in ultraviolet region and infrared region are found, which are considered to be the new electronic state of F-center and the new vibration states of NCO^- of the coupling F- NCO^- pairs. The quite novel behavior of these peaks under thermal treatment is given.