Abstract: A photostimulable rare earth metal doped barium strontium fluoride phosphor, characterized in that said phosphor is within the scope of following empirical formula (I):Ba.sub.1-x Sr.sub.x F.sub.2-a-b Br.sub.a X.sub.b :zAwherein:X is at least one member selected from the group consisting of Cl and I;x is in the range 0.06.ltoreq.x.ltoreq.0.50;a is in the range 0.75.ltoreq.a.ltoreq.0.96;b is in the range 0.ltoreq.b<0.15;z is in the range 10.sup.-7 <z.ltoreq.0.15, andA is Eu.sup.2+ and wherein fluorine is present stoichiometrically in said phosphor in a larger atom % than bromine taken alone or bromine combined with chlorine and/or iodine.

Abstract: A method for recording and reproducing an X-ray image is provided which method comprises the steps of:(1) causing a photostimulable phosphor to absorb image-wise or pattern-wise modulated X-rays,(2) photostimulating said phosphor with stimulating electromagnetic radiation selected from visible light and infrared light to release from the phosphor in accordance with the absorbed X-rays electromagnetic radiation different in wavelength characteristic from the radiation used in the photo-stimulation, and(3) detecting said light emitted by photostimulation, wherein said phosphor is a haloborate.

Abstract: A method for recording and reproducing an X-ray image comprising the steps of:(1) causing a photostimulable phosphor in a binder layer to absorb image-wise or pattern-wise modulated X-rays,(2) photostimulating said phosphor with stimulating electromagnetic radiation selected from visible light and infrared light to relase from the phosphor in accordance with the absorbed X-rays electromagnetic radiation different in wavelength characteristic from the radiation used in the photo-stimulation, and(3) detecting said light emitted by photostimulation, wherein said phosphor is an alkali earth metal(s) halogermanate or an alkali earth metal(s) halo(silicate-germanate) doped with Eu.sup.2+ and/or Ce.sup.3+ and/or thallium, and optionally co-doped with a rare earth metal ion other than Eu.sup.2+ or Ce.sup.3+ or with Na.sup.+, K.sup.+ or Li.sup.+ or a mixture of at least two of these co-dopants.