Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Nathan J. Hoffman0
Gregory A. Johnson0
Andrew J. Zillmer0
Date of Patent
November 24, 2009
0Patent Application Number
119006540
Date Filed
September 12, 2007
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A variable-ratio neutron-gamma ray source comprises a neutron generator, a shield, a collimator, and an external gamma target. The neutron generator generates neutrons and the shield reduces external radiation exposure. The collimator collimates the neutrons into a neutron beam that traverses the shield. The external gamma target generates a dual neutron-gamma ray beam from the neutron beam, wherein the dual neutron-gamma ray beam has a variable neutron-gamma ratio as a function of a thickness of the external gamma target.
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