A Backscatter Suppressed Electron Detector for the Measurement of "a.".

Autor: Komives, A., Wietfeldt, F. E., Trull, C., Bateman, F. B., Dewey, M. S., Thompson, A. K., Anderman, R., Balashov, S., Mostovoy, Yu.
Předmět:
Zdroj: Journal of Research of the National Institute of Standards & Technology; Jul/Aug2005, Vol. 110 Issue 4, p431-436, 6p, 1 Color Photograph, 1 Diagram, 6 Graphs
Abstrakt: A new method of measuring the electron-antineutrino angular correlation coefficient, little "a", from neutron decay--to be performed at the National Institute of Standards and Technology--will require an electron spectrometer that strongly suppresses backscattered electrons. A prototype consisting of six trapezoidal veto detectors arranged around a plastic scintillator has been tested with an electron beam produced by a Van de Graaff accelerator. The results of this test and its implications for the little "a" measurement are discussed. [ABSTRACT FROM AUTHOR]
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