Amplifier fine gain

Detector Slit MR sollor slit 3° Beam slit 0.0007" Ni Filter 4° take off angle Scan at 0.4° 20 per minute Amplifier - 16 coarse, 8.7 fine (gain)... 

Within complex multi-detector systems it may sometimes be necessary to combine the outputs from different detectors before submitting the result to the MCA. This demands very careful matching of the energy calibrations of the different sub-systems. In response to this, amplifiers may offer an SFG (super fine gain) control to provide much more precise gain adjustment. 

Collect a spectrum until the centroid of the chosen peak can be readily calculated or assessed. Then, adjust the fine gain of the amplifier until the centroid sits squarely on an integral channel (to within 0.1 channel). This will make subsequent reading of the peak maximum much easier. 

First amplifying stage (gain 3-10 adjustable by fine gain potentlometer). 

X-Ray diffraction data of atenolol are presented in Table 7 (5) The diffraction spectrum was produced by monochromatic radiation from the CuK line (1.542 a) which was obtained by excitation at 55 kV and 2o mA. Recording conditions were as follows. Optics detector slit o.2° M.R. soller slit, 5° beam slit, o.ooo7 Ni filter, 3° take off angle. Goniometer scan at 2°, 2o/min. Detector amplifier gain 16 coarse, 9 1 fine. Scintillation co-... 

Now adjust the amplifier gain, coarse and fine, so as to place a target peak where expected. For the 1332keV,... 

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