Patent Number: 043705553
Section: claims

1. A photon storing and irradiation device having a radiation shielded body comprising a cylindrical container of circular cross section, having an axis (A), in said body; a disk housing located in said cylindrical container, dimensioned slightly smaller than that of said cylindrical container; a cylindrical gamma radiation containing housing in said disk, said housing having an opening on the periphery of the disk, with an axis perpendicular to axis (A) when the disk is rotated inside said body; said disk also containing a passage having an opening at one and the other of its ends at the periphery of the disk and capable of being located simultaneously opposite an optical device and a precollimator located in the walls of said cylindrical container and connected by an optical fiber, the ends of which, respectively called the receiver and emitter are located at right angles to each end of said passage via dismountable fixing means, and also having an optical device adjacent said body capable of producing a ray of light onto the receiver of said fiber; means for rotating said disk between a first position enabling said housing to irradiate a desired object for which the axis of said housing axis coincides with the axis (Y,Y) of the precollimator, and a second position for which said irradiation source is in a stored position while enabling the optical device by means of the optical fiber to produce a ray of light at the precollimator; and a part having an axis (Y,Y) perpendicular to axis (A) in the bottom of said body with said precollimator disposed at right angles to said port of axis (Y,Y). 2. The device of claim 1, wherein the axis of the receiver and emitter ends of the optical fiber define an angle close to 90.degree.. 3. The device of claim 1, comprising electrical means for locking the disk in said first position. 4. The device of claim 1, wherein the disk is made of sintered tungsten. 5. The device of claim 1, wherein the body is constituted by a mass of lead in which is included a block of depleted uranium, this block defining the portion of the wall of the cavity located around said source when said disk is in said second position. 6. The device of claim 1, wherein the container of the irradiation head comprising the precollimator is provided with flanges for temporarily fixing it, by means of screws, on the movable arm of the support. 7. The device of claim 1, comprising mechanical means for automatically placing the disk in said first position. 8. The device of claim 7, wherein means for displacing said disk comprise a shaft coupled, on the one hand, to a geardown motor via an electromagnetic clutch and, on the other hand, to a rack movable between two end positions corresponding respectively to said first and second positions of the disk. 9. The device of claim 8, wherein the end position of the rack corresponding to said second position of the disk is defined by an electromagnetic stop adapted to lock the rack, this stop acting against a spring adapted to return the rack into an end position defined by a mechanical stop.