Thermoluminescent coactivated rare earth oxyhalide phosphors and x-ray image converters utilizing said phosphors

摘要

Oxyhalides of lanthanum, gadolinium and lutetium coactivated with a first activator selected from bismuth and samarium to provide the color of light emission and a second coactivator which increases the amount of stored energy in a stored radiographic latent image are found to be superior in their conversion efficiency of x-rays to visible light.