Patent ID: 7957504

Claim:
A method for determining the proportional 235 U content of UF6, the method comprising: providing UF6 in a first container having a test zone; measuring a quantity of radiation spontaneously emitted by 235 U in said UF6; generating X-rays of a first energy level in an X-Ray synthesizer machine; irradiating at least a portion of said first container and said UF6 in said first container with said first energy X-ray, said first energy X-rays being directed at an acute angle to the longitudinal axis of said test zone; measuring a quantity of X-rays exiting the first container and UF6; and determining the fraction of 235 U present in the UF6 relative to the total Uranium content of said UF6 utilizing the quantity of detected first energy X-rays transmitted through the container and UF6 and the 235 U radiation count.