Abstract: A phosphorescent phosphor represented by m(Sr.sub.1-a,M.sup.1.sub.a)O.n(Mg.sub.1-b, M.sup.2.sub.b)O.2(Si.sub.1-c,Ge.sub.c)O.sub.2 :Eu.sub.x Ln.sub.y, wherein M.sup.1 is Ca and/or Ba, M.sup.2 Be, Zn and/or Cd, Ln is Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, B, Al, Ga, In, Tl, Sb, Bi, As, P, Sn, Pb, Ti, Zr, Hf, V, Nb, Ta, Mo, W, Cr and/or Mn, and wherein a, b, c, m, n, x and y are within ranges of 0.ltoreq.a.ltoreq.0.8, 0.ltoreq.b.ltoreq.0.2, 0.ltoreq.c.ltoreq.0.2, 1.5.ltoreq.m.ltoreq.3.5, 0.5.ltoreq.n.ltoreq.1.5. 1.times.10.sup.-5 .ltoreq.x.ltoreq.1.times.10.sup.-1, and 1.times.10.sup.-5 .ltoreq.y.ltoreq.1.times.10.sup.-1, and which contains a halogen element such as F, Cl, Br or I in an amount within range of from 1.times.10.sup.-5 to 1.times.10.sup.-1 g.multidot.atm/mol of the host material.

Abstract: A rare earth element activated complex halide phosphor represented by the formulaBaF.sub.2.aBaX.sub.2.bMgF.sub.2.cMe.sup.I F.dMe.sup.II F.sub.2.eMe.sup.III F.sub.3 :fLnwherein X is at least one halogen selected from the group consisting of Cl, Br and I, Me.sup.I is at least one alkali metal selected from the group consisting of Li and Na, Me.sup.II is at least one divalent metal selected from the group consisting of Be, Ca Sr, Me.sup.III is at least one trivalent metal selected from the group consisting of Al, Ga, Y and La, Ln is at least one rare earth element selected from the group consisting of Eu, Ce an Tb, and a, b, c, d, e and f are numbers satisfying the conditions of 0.90.ltoreq.a.ltoreq.1.05, 0.ltoreq.b.ltoreq.1.2, 0.ltoreq.c.ltoreq.0.9, 0.ltoreq.d.ltoreq.1.2, 0.ltoreq.e.ltoreq.0.03, 10.sup.-6 .ltoreq.f.ltoreq.0.03 and c+d+e.noteq.0.

Abstract: A radiation image storage panel for obtaining a radiation image of an object by causing said panel to absorb a radiation transmitted through said object and then exposing the panel to light of wavelength ranging from 450 to 800 nm to cause the panel to release radiation energy stored therein as fluorescent light, said panel having a fluorescent layer of a rare earth element activated complex halide stimulable phosphor represented by the formulaBaF.sub.2.aBaX.sub.2.bMe.sup.I F.cMe.sup.II F.sub.2.dMe.sup.III F.sub.3 :eLnwherein X is at least one halogen selected from the group consisting of chlorine, bromine and iodine, Me.sup.I is at least one alkali metal selected from the group consisting of lithium and sodium, Me.sup.II is at least one divalent metal selected from the group consisting of beryllium, calcium and strontium, Me.sup.

Abstract: A radiographic intensifying screen comprising a support and a fluorescent layer formed thereon, said fluorescent layer consisting essentially of at least one terbium-activated rare earth oxysulfide phosphor of the formula:(Ln.sub.1-x-y, Tb.sub.x, A.sub.y).sub.2 O.sub.2 S (I)wherein Ln is at least one element selected from the group consisting of Y, La, Gd and Lu, A is at least one element selected from the group consisting of Ce, Pr, Nd, Dy, Er and Tm, and x and y are numbers within the ranges of 0.002.ltoreq.x.ltoreq.0.20 and 0.ltoreq.y.ltoreq.0.01, respectively, and at least one terbium-activated rare earth tantalate complex oxide phosphor of the formula:(Ln'.sub.1-z, Tb.sub.z).sub.2 O.sub.3.mTa.sub.2 O.sub.5.nB.sub.2 O.sub.3 (II)wherein Ln' is at least one element selected from the group consisting of Y, La, Gd and Lu, and z, m and n are numbers within the ranges of 0.0001.ltoreq.z.ltoreq.0.1, 0.95.ltoreq.m.ltoreq.1.05 and 0.ltoreq.n.ltoreq.5.0, respectively.

Abstract: A rare earth element activated complex halide phosphor represented by the formulaBaF.sub.2.aBaX.sub.2.bMgF.sub.2.cMe.sup.I F.dMe.sup.II F.sub.2.eMe.sup.III F.sub.3 :fLnwherein X is at least one halogen selected from the group consisting of Cl, Br and I, Me.sup.I is at least one alkali metal selected from the group consisting of Li and Na, Me.sup.II is at least one divalent metal selected from the group consisting of Be, Ca and Sr, Me.sup.III is at least one trivalent metal selected from the group consisting of Al, Ga, Y and La, Ln is at least one rare earth element selected from the group consisting of Eu, Ce and Tb, and a, b, c, d, e and f are numbers satisfying the conditions of 0.90.ltoreq.a.ltoreq.1.05, 0.ltoreq.b.ltoreq.1.2, 0.ltoreq.c.ltoreq.0.9, 0.ltoreq.d.ltoreq.1.2, 0.ltoreq.e.ltoreq.0.03, 10.sup.-6 .ltoreq.f.ltoreq.0.03 and c+d+e.noteq.0.

Abstract: A radiation image conversion panel is made of a stimulable phosphor which stores radiation energy when exposed to a radiation and emits light when stimulated by visible light or infrared rays. The panel is subjected to excitation before it is exposed to a radiation for recording or storing a radiation image therein by exposing the panel to light having a wavelength within the range of stimulating light wavelength of the stimulable phosphor used in the panel. By exciting the panel before exposure to radiation, the energy of radiation stored therein which will cause a noise is removed therefrom.

Abstract: A radiation image storage panel having a fluorescent layer which comprises a binder and a stimulable phosphor dispersed therein. Further, the panel is colored with a colorant so that the mean reflectance of the panel in the wavelength region of the stimulating rays of the stimulable phosphor is lower than the mean reflectance of the panel in the wavelength region of the light emitted by the stimulable phosphor upon stimulation thereof. The panel provides an image of high sharpness.

Abstract: A divalent metal fluorohalide phosphor having a compositional formula:(Ba.sub.1-x, M.sup.II.sub.x)F.sub.2.aBaX.sub.2 :yEu,zB(wherein, M.sup.II is at least one member selected from the group consisting of beryllium, magnesium, calcium, strontium, zinc, and cadmium, X is at least one member selected from the group consisting of chlorine, bromine, and iodine, and a, x, y, and z are numbers satisfying the respective conditions 0.5.ltoreq.a.ltoreq. 1.25, 0.ltoreq.x.ltoreq.1, 10.sup.-6 .ltoreq.y.ltoreq.2.times.10.sup.-1, and 0<z.ltoreq.2.times.10.sup.-1), when exposed to and allowed to absorb radiation or ionizing radiation and subsequently excited with a light of 450 to 800 nm of wave length, provides stimulated emission of light with heretofore unattainable high luminance.A radiation image storage panel is produced by depositing on a support a phosphor layer formed of the phosphor of this invention.

Abstract: Pigment coated phosphors comprising a europium activated yttrium oxysulfide phosphor having a europium activator value within a range of 0.04 gram atom to 0.066 gram atom per 1 mol of yttrium oxysulfide having adhered thereto red colored pigment particles such as cadmium sulfoselenide pigment particles, rouge pigment particles or red lead pigment particles, in respective amounts of 0.1 to 2.0 wt %, 0.05 to 2.0 wt % or 0.1 to 12 wt %, based upon the europium activated yttrium oxysulfide phosphor; and a cathode ray tube for high contrast color television using as a red emitting phosphor at least one of the three pigment coated phosphors.

Abstract: A barium fluorohalide phosphor represented by the formulaBaFX:xCe,yAwherein X is at least one halogen selected from the group consisting of chlorine, bromine and iodine, A is at least one metallic element selected from the group consisting of indium, thallium, gadolinium, samarium and zirconium, and x and y are numbers satisfying the conditions of 0<x.ltoreq.2.times.10.sup.31 1 and 0<y.ltoreq.5.times.10.sup.-2, respectively. The phosphor emits stimulated light of higher luminance than the conventional cerium activated barium fluorohalide phosphor when stimulated by light of wavelength ranging from 450 to 800 nm after exposure to ionizing radiations such as X-rays or .gamma.-rays, ultraviolet rays, cathode rays, or the like. Further, the phosphor emits spontaneous light of high luminance when excited by ionizing radiations, ultraviolet rays, cathode rays, or the like.

Abstract: A radiation image recorded in a stimulable phosphor sheet or plate is visualized by stimulating the phosphor with stimulating rays. Being stimulated by the stimulating rays, the phosphor emits detectable light. The emitted light is detected by a photodetector. The wavelength of the stimulating rays is selected within the range of 600 to 700 nm. The wavelength of the light detected by the photodetector is selected within the range of 300 to 500 nm.

Abstract: A radiation image is recorded on a stimulable phosphor and the recorded image is reproduced by utilizing the stimulability of the phosphor. As the phosphor is used an alkaline earth metal fluorohalide phosphor having high stimulability represented by the formula(Ba.sub.1-x M.sub.x.sup.II)FX:yAwherein M.sup.II is at least one divalent metal selected from the group consisting of Mg, Ca, Sr, Zn and Cd, X is at least one halogen selected from the group consisting of Cl, Br and I, A is at least one element selected from the group consisting of Eu, Tb, Ce, Tm, Dy, Pr, Ho, Nd, Yb and Er, and x and y are numbers satisfying the conditions of 0.ltoreq.x.ltoreq.0.6 and 0.ltoreq.y.ltoreq.0.2.

Abstract: A radiation image is recorded on a stimulable phosphor, and the recorded image is reproduced by utilizing the stimulability of the phosphor. As the phosphor is used at least one of the following phosphors.(a) a copper and lead activated zinc sulfide phosphor ZnS:Cu,Pb).(b) a phosphor included in a group of europium activated barium aluminate phosphors represented by the formulaBaO.xAl.sub.2 O.sub.3 :Euwherein x is a number satisfying the condition of 0.8.ltoreq.x.ltoreq.10.(c) a phosphor included in a group of divalent metal silicate phosphors represented by the formulaM.sup.II O.ySiO.sub.2 :Awherein M.sup.II is at least one divalent metal selected from the group consisting of Mg, Ca, Sr, Zn and Ba, A is at least one element selected from the group consisting of Ce, Tb, Eu, Tm, Pb, Tl, Bi and Mn, and y is a number satisfying the condition of 0.5.ltoreq.y.ltoreq.2.5.

Abstract: A pigment coated phosphor used as a green emitting phosphor for a high contrast color television cathode ray tube. A green emitting phosphor is coated with TiO.sub.2 --ZnO--CoO--NiO system pigment particles.

Abstract: On the surface of a phosphor, pigment particles are uniformly adhered by a layer of a gelatin-gum arabic mixture. A process for manufacturing such a pigment coated phosphor includes the steps of preparing an aqueous solution of gelatin and an aqueous solution of gum arabic, allowing the phosphor to disperse homogeneously into one of these aqueous solutions, allowing the pigment particles to disperse homogeneously into the other aqueous solution, and mixing the so obtained phosphor and pigment dispersions.