Fe55 with 50/50 Ar/CO2, New preamp and new HVB, ADC half-range
Mixed 50/50 at 40 sccm total, moved the source (collimated as usual) across the top of the straw towards the edge....
max amplitude histo for 55Fe mixed 50/50 at 40 sccm
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energy histo for 55Fe mixed 50/50 at 40 sccm
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With the source over the edge of the straw, the count rate halves and the camel disappears.
max amplitude histo for 55Fe (side of straw) mixed 50/50 at 40 sccm
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energy histo for 55Fe (side of straw) mixed 50/50 at 40 sccm
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