Design and Test a Thin Wall ,Fast Pulse 252Cf Ionization Chamber
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Graphical Abstract
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Abstract
A thin wall, fast pulse 252Cf ionization chamber, which was designed for calibrating efficiency of neutron detectors， was described. The ionization chamber can be used as the start detector in timeofflight measurements of the 252Cf fission neutron spectrum. The chamber is composed of 0.15 mm thick stainless steel, the rise time of pulse signals is about 5.5 ns. As the test result shows, the detection efficiency of fission fragments is 99.2%, and pulse signals caused by fissions are distinguished clearly from those caused by α decays.
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