Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system
Reexamination Certificate
2009-06-25
2011-10-25
Porta, David (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Semiconductor system
C438S057000, C438S096000, C257S429000, C252S518100
Reexamination Certificate
active
08044358
ABSTRACT:
A neutron sensing material detector includes an anode; a cathode; and a semiconductor material disposed between the anode and the cathode. An electric field is applied between the anode and cathode. The semiconductor material is composed of a ternary composition of stoichiometry LiM2+GVand exhibits an antifluorite-type ordering, where the stoichiometric fractions are Li=1, M2+=1, and GV=1. Electron-hole pairs are created by absorption of radiation, and the electron-hole pairs are detected by the current they generate between the anode and the cathode. The anode may include an array of pixels to provide improved spatial and energy resolution over the face of the anode. The signal value for each pixel can be mapped to a color or grey scale normalized to all the other pixel signal values for a particular moment in time. A guard ring or guard grid may be provided to reduce leakage current.
REFERENCES:
R. Bacewicz and T.F. Ciszek, “Preparation and characterization of some AI BII CV type semiconductors”, American Institute of Physics, Applied Physics Letters, vol. 52, No. 14, Apr. 4, 1988, pp. 1150-1151.
L.H. H Yu et al., “Electronic structures of filled tetrahedral semiconductors LiMgN and LiZnN; conduction band distortion.” Elsevier, Physica B, The American Physical Society, vol. 353, 2004, pp. 278-286.
K. Kuriyama et al, “Optical Band gap of the filled tetrahedral semiconductor LiZP,” Rapid Communication, Physical Review B, vol. 37, No. 12, Apr. 15, 1988-II, pp. 7140-7142.
A.J. Nelson et al, “Synchrotron Radiation Photoemission Study of the Electronic Structure of the Filled Tetrahedral Semiconductors LiZnAs and LiZnP,” Journal of Electron Spectroscopy and Related Phenomena, vol. 51, 1990, pp. 623-628.
K. Shah, G.Entine, “Solid-State NeutronDetection with LiZnP”, DOE Grant No. DE-FG02-98ER82651 (2009), http://www.science.doe.gov/sbir/awards—abstracts/sbir/cycle16/phase1/intro.htm, Item#108.
Clothier Brent Allen
Ivan Adrian
McDevitt Daniel Bruno
Christian Joseph J.
General Electric Company
Maupin Hugh H
Porta David
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