Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Nathan J. Hoffman1
Gregory A. Johnson1
Andrew J. Zillmer1
Date of Patent
November 24, 2009
1Patent Application Number
119006541
Date Filed
September 12, 2007
1Patent 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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