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Scheme of the double bolometer: (A) 50 g scintillating sapphire, (B) Ge optical detector, (C) thermistors, (D) reflecting cavity, (E) source, and (F) source.
Light vs heat discrimination plot for a calibration. Discrimination between events and nuclear recoils is evident. The lines at 59.5 keV (from an internal source) and 122.1 and 136.5 keV are clearly seen in the band at values (in the heat channel) around 1.2, 2.4, and 2.7, respectively.
Main parameters of the light vs heat response of undoped sapphire to and gamma sources. Subscripts and represent heat and light, respectively, and represents their correlated terms. is the mean voltage, its standard deviation, the correlation between light and heat output voltages, and are the mean light and heat yields.
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