Commissariat a L'energie Atomique

Agence Nationale De Valorisation De La Recherche (anvar)

Philippe Gerard

Alain F Deneuville

Christian Bianchin

Thierry Capra

Hubert Jouve

Gaetan Pleyber

Michel Madore

Radioluminescent screen with an improved quality factor and spatial resolution for X or gamma photon imaging having a transparent plate (2) made from a scintillating material cooperating with an image sensor (16) transforming the light photons produced in the scintillating plate (2) by X or gamma photons into currents supplying a video system, characterized in that the scintillating plate (2) has in its volume light deflecting lines (4) distributed in a direction perpendicular to the plane of the plate, in accordance with spacings equal to or smaller than those of the image points of the said plate.

Radioluminescent screen with an improved quality factor and spatial

Process for producing a ferrimagnetic garnet layer having a high magnetic anisotropy on an amagnetic substrate, wherein it comprises the stages of forming at least one ferrimagnetic garnet layer by epitaxy from the amagnetic substrate, high dose ion implantation in the ferrimagnetic garnet layer in order to produce defects therein and heating the entity in the presence of a reducing agent to a temperature between 250.degree. and 450.degree. C. Application to the production of bubble stores with non-implanted propagation patterns.

Process for producing a layer having a high magnetic anisotropy in a

Process for producing a ferrimagnetic garnet layer having a high magnetic anisotropy on an amagnetic substrate, wherein it comprises the stages of forming at least one ferrimagnetic garnet layer by epitaxy from the amagnetic substrate, implanting ions in the ferrimagnetic garnet layer in order to produce defects therein, depositing on the ferrimagnetic garnet layer a metal layer able to activate and diffuse hydrogen into said garnet layer and heating under a hydrogen atmosphere of the complete structure, in order to bring about the diffusion of hydrogen into the ferrimagnetic garnet layer. Application to the production of bubble stores with non-implanted propagation patterns.

Process for the production by catalysis of a layer having a high

The invention relates to a process making it possible to obtain at least one homogeneous planar magnetization layer in a material constituted by a ferrimagnetic garnet film epitaxied on an amagnetic substrate. According to this process, at least one implantation of ions, with the exception of ions of gaseous elements and those of metallic elements occurring in the composition of the solvent is performed in the film at a high dose. The film and substrate are annealed in order to recrystallize in monocrystalline form that part of the film made amorphous by implantation. Application to the production of magnetic bubble memories.

Process for obtaining a homogeneous planar magnetization layer in a

The transparent material is constituted by a thin film of a substoichiometric amorphous oxide of molybdenum or tungsten, the electrical conductivity of the material being dependent on the dose of optical radiation which it has received. The potential applications of the material include the fabrication of memory devices and image converter devices.

Transparent material having electrical conductivity which is dependent

The material is constituted by a sub-stoichiometric amorphous oxide doped by hydrogen corresponding to the formula MO.sub.x H.sub.y, where M is a metal of group VI such as tungsten, with 2.6 &lt; x &lt; 2.8 and 0.3 &lt; y &lt; 0.6. The method of fabrication of the material involves a cathodic reactive sputtering operation which is carried out by subjecting a target having a base of a metal of group VI such as tungsten or a metal oxide to an ion bombardment in the presence of a reactive gas which consists in particular of oxygen and hydrogen.

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Saint Ismier, France

Philippe Gerard