Primary oxidation and reduction products in x-irradiated aspartic acid

Abstract
The primary reduction products identified by ESR–ENDOR spectroscopy in single crystals of DL‐aspartic acid hydrochloride irradiated at 4.2°K are anions formed by addition of an electron to the carbonyl oxygen atoms of the carboxylic acid groups. The main consequence of the oxidation process is to produce a hole centered mainly on atomic chlorine.