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:
Apr. 12, 1988
Filed:
Aug. 18, 1986
Francis H Ruddy, Monroeville, PA (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A method and apparatus are described for producing a high fluence neutron dosimeter which serves as a permanent record for fission rate measurement. An alpha-emitting source which is a radioactive parent of the daughter isotope of interest is used to implant recoil ions resulting from alpha decay into a substrate such as a mica solid state track recorder. The source and the mica solid state track recorder are arranged in spaced, opposing relation in an assembly housed in a vacuum. For example, a .sup.241 Am source in thin layer form can be placed next to the mica solid state track recorder. Each alpha decay of .sup.241 Am results in a .sup.237 Np ion with enough recoil energy to be implanted in the solid state track recorder. An ion-implanted mica solid state track recorder so produced is then exposed to neutrons, etched, and both the induced fission tracks and recoil ion tracks are counted. As a result, the fission rate in fissions per atom can be calculated.