The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 04, 2003
Filed:
Apr. 27, 2001
James D. Kurfess, Gambrills, MD (US);
Richard Kroeger, Bowie, MD (US);
W. Neil Johnson, Alexandria, VA (US);
Bernard Phlips, Accokeek, MD (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A device for determining the photon energy E and direction cone angle of incident gamma ray includes a radiation detector for receiving an incident gamma ray having an unknown photon energy E and an unknown direction and for scattering the gamma ray with two Compton scattering interactions and a subsequent scattering or absorption interaction. The detector provides three outputs, each output corresponding to one of the Compton scattering and the subsequent scattering or absorption interactions, to a processor, which is programmed to calculate the photon energy E and direction cone angle of the incident gamma ray based on these outputs. The detector configuration, for example one that includes multiple detector layers, provides an accurate determination of both the position and energy of the incident gamma ray, while the calculation of the photon energy E and direction cone angle of the incident gamma ray does not require absorption and measurement of the entire or substantially all the energy E in the detector.