Radiation method of measuring sheath thickness and eccentricity

Claim 1

THE METHOD OF MEASURING THE THICKNESS OF A PREDOMINANTLY RADIATION-ABSORBENT, TUBULAR SHEATH ENVELOPING A CORE OF PREDOMINANTLY RADIATION-SCATTERING MATERIAL AT A POINT ON THE PERIPHERY OF THE SHEATH, WHICH COMPRISES THE STEPS OF DIRECTING A BEAM OF INTERMEDIATE ENERGY RANGE PHOTONS TOWARD THE CENTER OF THE CORE ALONG A LINE NOT COINCIDENT WITH THE POINT TO BE MEASURED, WHICH BEAM PENETRATES THE SHEATH WITH NO SIGNIFICANT ATTENUATION AND ENTERS THE CORE WHERE IT IS SCATTERED RESULTING IN LOWER ENERGY RADIATION DIRECTED AT ALL ANGLES TO THE INITIAL BEAM, THE INTENSITY OF THE SCATTERED RADIATION BEING ATTENUATED BECAUSE OF ITS LOWER ENERGY BY AN AMOUNT DEPENDENT UPON THE THICKNESS AND ATOMIC NUMBER OF THE SHEATH PENETRATED AS THE RADIATION EXITS FROM THE SHEATHED CORE; AND MEASURING THE ATTENUATED INTENSITY OF THE SCATTERED RADIATION DIRECTED THROUGH A SMALL AREA ENCOMPASSING THE POINT TO BE MEASURED TO PROVIDE A MEASURE OF THE THICKNESS OF THE SHEATH AT THAT POINT.

Claim 2

THE METHOD OF MEASURING THE THICKNESS OF A PREDOMINANTLY RADIATION-ABSORBENT, TUBULAR SHEATH ENVELOPING A CORE OF PREDOMINANTLY RADIATION-SCATTERING MATERIAL AT A POINT ON THE PERIPHERY OF THE SHEATH, WHICH COMPRISES THE STEPS OF DIRECTING A BEAM OF INTERMEDIATE ENERGY RANGE PHOTONS TOWARD THE CENTER OF THE CORE ALONG A LINE NOT COINCIDENT WITH THE POINT TO BE MEASURED, WHICH BEAM PENETRATES THE SHEATH WITH NO SIGNIFICANT ATTENUATION AND ENTERS THE CORE WHERE IT IS SCATTERED RESULTING IN LOWER ENERGY RADIATION DIRECTED AT ALL ANGLES TO THE INITIAL BEAM, THE INTENSITY OF THE SCATTERED RADIATION BEING ATTENUATED BECAUSE OF ITS LOWER ENERGY BY AN AMOUNT DEPENDENT UPON THE THICKNESS AND ATOMIC NUMBER OF THE SHEATH PENETRATED AS THE RADIATION EXITS FROM THE SHEATHED CORE; AND MEASURING THE ATTENUATED INTENSITY OF THE SCATTERED RADIATION DIRECTED THROUGH A SMALL AREA ENCOMPASSING THE POINT TO BE MEASURED TO PROVIDE A MEASURE OF THE THICKNESS OF THE SHEATH AT THAT POINT.