Abstract
We describe three approaches to increase the beta detection efficiency of microchannel plate detectors for biological beta autoradiography: (a) reversing the microchannel plate (MCP) bias polarity, changing the conventional high negative voltage on the input MCP to a grounded input, (b) a reduction in MCP pore size from 12.5 to 6 μm , (c) using a CsI coating as an efficient secondary electron emitter. We also present our first measurements of double-tracer ( 3H and 14C) imaging using pulse height analysis to distinguish between isotopes.
Published Version
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