Indian Journal of Physics and Proceedings of the Indian Association for the Cultivation of Science January 1953

The shapes of the equi-intensity surfaces have been discussed in the light of the thermal theories The obseved surfaces agree with the results of the thermal theories. [...] The mapping of equi-intensity lines around the the reciprocal lattice points of benzil and discussing their shapes and forms in the light of the thermal theories of the origin of the extra reflections have been aimed at in this paper. [...] The intensities of the diffuse scattering measured from the different photographs were brought to the same scale with the help of the ratios of the peak intensities of a particular aluminium line Observed in the different photographs. [...] Thus the required neutron flux Fo would be obtained by measuring the absolute 8-activity of the absorber a and the ratio R of the initial activities of the solution exposed to the source with and without the absorber. [...] Knowing the mass of the sample and the total nias exposed a is calculated (after correcting for geometry back scattering self-absorption of the a-rays etc.) The effective aperture of the window of the counter was found out by measuring the rate of counting when a collimated /3-ray source was scanned across the counter window both along the two mutually perpendicular diameters of the window wit