摘要:
There is disclosed a novel cerium activated rare earth oxyhalide phosphor which has the following formula (I):LnOX:xCe (I)in which Ln is Y, La, Gd or Lu; X is Cl, Br or I; and x is 0
摘要:
A recording material is exposed to radiation carrying image information in order to store a radiation image thereon. The recording material is provided with a stimulable phosphor layer constituted of a cerium activated lanthanum oxyhalide phoshor which is represented by the general formula LaOX:xCe, where X is at least one halogen selected from the group consisting of Cl, Br, and I, and x is a number satisfying the condition 0
摘要翻译:将记录材料暴露于携带图像信息的辐射中,以便在其上存储辐射图像。 记录材料设置有由通式LaO x:x C e表示的铈活化镧氧卤素磷,其中X是选自Cl,Br和I中的至少一种卤素构成的可刺激的磷光体层,以及 x是满足条件0
摘要:
A method of preparing a barium fluorohalide phosphor including a mixing step in which phosphor materials are mixed, a firing step in which a resulting mixture of phosphor materials is fired, an annealing step, and a cooling step in which the mixture of phosphor materials is cooled to the ordinary temperature. In the firing step, after the mixture of phosphor materials has been fired at a constant temperature, an atmosphere at the time of the firing is removed while the constant temperature is maintained, and is replaced with an atmosphere different from the atmosphere at the time of the firing, and thereafter, annealing is carried out. In the cooling step, the atmosphere at the time of the firing is removed and replaced with a first different atmosphere, and then first cooling is carried out. Further, the first atmosphere is removed and replaced with a second atmosphere, and then second cooling is carried out. Alternatively, in the cooling step, the atmosphere at the time of the firing is removed and replaced with vacuum or a neutral gas atmosphere, and then cooling is carried out.
摘要:
A radiation image recording and reproducing method comprising steps of:(i) causing a divalent europium activated complex halide phosphor having the formula (I):M.sup.II X.sub.2 .multidot.aM.sup.II X'.sub.2 .multidot.bMgX".sub.2 :xEu.sup.2+ (I) in which M.sup.II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X.noteq.X'; X" is at least one halogen selected from the group consisting of F, Cl, Br and I; and a, B and x are numbers satisfying the conditions of 0.1.ltoreq.a.ltoreq.10.0, 2.times.10.sup.-5 .ltoreq.b.ltoreq.2.times.10.sup.-2 and O
摘要:
A divalent europium activated alkaline earth metal halide phosphor which is coactivated with boron and has the formula (I):M.sup.II X.sub.2.aM.sup.II X'.sub.2 :xEu.sup.2+,yB (I)in which M.sup.II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X.noteq.X'; and a, x and y are numbers satisfying the conditions of 0.1.ltoreq.a.ltoreq.10.0, 0
摘要:
A divalent europium activated alkaline earth metal halide phosphor having the formula (I):M.sup.II X.sub.2 .multidot.aM.sup.II X'.sub.2 .multidot.bA:xEu.sup.2+(I)in which M.sup.II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I, and X.noteq.X'; A is at least one oxide selected from the group consisting of SiO.sub.2 and P.sub.2 O.sub.5 ; and a, b and x are numbers satisfying the conditions of 0.1.ltoreq.a.ltoreq.10.0, 10.sup.-4 .ltoreq.b.ltoreq.2.times.10.sup.-1 and 0
摘要:
A divalent europium activated barium flourohalide phosphor wherein a portion of barium is replaced with an alkali metal and a trivalent metal, having the formula:Ba .sub.1-x M.sub.x/2 L.sub.x/2 FX:yEu.sup.2+in which M is at least one alkali metal selected from the group consisting of Li, Na, K, Rb and Cs; L is at least one trivalent metal selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Al, Ga, In and Tl; X is a least one halogen selected from the group consisting of Cl, Br and I; and x and y are numbers satisfying the conditions of 10.sup.-2 .ltoreq.x.ltoreq.0.5 and 0
摘要翻译:一种二价铕活化的钡白炽荧光体,其中一部分钡被碱金属和三价金属代替,其具有下式:Ba 1-x M x / 2 L x / 2 F X:y E u 2+,其中M是至少一种选自以下的碱金属 由Li,Na,K,Rb和Cs组成; L是选自Sc,Y,La,Ce,Pr,Nd,Pm,Sm,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Al,Ga,In中的至少一种三价金属 和T1; X是选自Cl,Br和I中的至少一种卤素; 并且x和y分别是满足条件为10-2 = x 0.5和0
摘要:
In a radiation image recording and read-out system in which a radiation image is once recorded on a recording material comprising a stimulable phosphor layer, the recording material is then scanned with a laser beam, and light emitted from the recording material is photoelectrically read out to reproduce a visible image, a gas ion laser beam having a wavelength shorter than 600 nm is employed as the laser beam. The recording material is fixed on a supporting material, circulated and reused to record radiation images thereon. The apparatus comprises a mechanism for circulating the recording material with respect to the image read-out section by repeatedly moving the supporting material and the image read-out section with respect to each other, and an erasing apparatus for eliminating the radiation energy remaining in the recording material after the read-out step. The supporting material is an endless belt, a rotatable drum or a plate, and the recording material is a continuous phosphor layer or a phosphor sheet.
摘要:
A divalent europium activated alkaline earth metal fluorohalide phosphor containing a transition metal as a coacitivator and a sodium halide, having the formula (I):M.sup.II FX.multidot.xNaX':yEu.sup.2+ :zA (I)in which M.sup.II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; each of X and X' is at least one halogen selected from the group consisting of Cl, Br and I; A is at least one transition metal selected from the group consisting of V, Cr, Mn, Fe, Co and Ni; and x, y and z are numbers satisfying the conditions of 0
摘要:
There is provided a method for preparing a highly accelerated-phosphorescent phosphor whose erasability and after-image characteristic are both improved. Phosphor materials are mixed together to obtain a mixture, and the mixture of phosphor materials is fired in a furnace having a firing region whose capacity is 2 to 500 L per kilogram of the mixture, at a temperature of 550 to 1000° C. while introducing 1 to 200 ml of oxygen in volume at room temperature per liter capacity of the firing region in the furnace, to thereby prepare a phosphor represented by the following compositional formula (I): (Ba1−a, MIIa)FX.bMI.cMIII.dA:xLn (I) wherein, MIIa is alkaline earth metal such as Sr, Ca or Mg; MI is alkali metal such as Li, Na or K; MIII is Al, Ga or In; X is Cl, Br or I; Ln is rare earth element such as Ce, Eu or the like; A is a metallic oxide such as Al2O3; and a, b, c, d and x are numerical values within the ranges of 0≦a≦0.3, 0