Choline chloride and six analogs have been exposed in the dry, crystalline state to high-energy electron and gamma radiation. This investigation hat confirmed the abnormal radiation sensitivity of choline chloride, Its G values (molecules decomposed/100 ev) were found to be: e"-radiation, 20; y-radtation, 175. These high values indicate a chain mechanism for the solid-stale reaction. The G values for the choline analogs were found to range from I to 18 for the electron Irradiations and from • to 52 for the gamma irradiations. Betaine hydrochloride approaches choline chloride in instability toward high-energy electrons but is far more stable in the presence of y-rays.
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