Authors: Madhulika Pathak Shaibal Gupta Debashis Bhattacharya M K Rao B K Bhaumik
Publish Date: 2009/08/19
Volume: 83, Issue: 7, Pages: 993-1000
Abstract
Indigenously fabricated portable gammaray spectrometer PGRS is used for the measurement of gamma activity of 214Bi 176 MeV and 208TI 262 MeV under field conditions in Mohar area Shivpuri Distt MP The energies are discriminated by using a Nal TI crystal of size 175″ × 2″ PGRS used to map the primordial elemental distributions shows reversals of concentration of thorium and uranium represented by radium group in field and lab analysis in many samples which is attributed to the inhomogenity of distribution of these elements in the area The concept of difference in the volume of dish shaped field sample and the randomly picked up sample from the field grid point 400 gm in lab analysis is utilized to interpret the inhomogenity of these elements However interpretations are based on the assumption that these primordial elements U Th are in secular equilibrium and the terrain has low topographic relief
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