Physics
Scientific paper
Aug 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009chphl..26h9201j&link_type=abstract
Chinese Physics Letters, Volume 26, Issue 8, pp. 089201 (2009).
Physics
Scientific paper
We present a study on the secondary x-rays of energy band 2-100 keV emitted by the intruded principal pollutant components (gases and minerals) brought up in the lower atmosphere by dust storms, monsoon drift and the gravitational pull on meteoritic showers. On the ground we employed a 1.5 × 1 inch2 NaI crystal in a scintillation detector, suitable for the energy range 2-100 keV of secondary x-rays, providing better energy resolution than a larger sized crystal. In order to eliminate the radioactive background of the Earth, the detector was well shielded on all sides with the help of the lead (Pb) container, except with a small open window at the top to permit only vertically incident secondary radiation. The results from the data analysis obtained during the monsoon over Udaipur city (India) during the period from July to September (2006) have revealed a linear correlation between dust storm cum monsoon clouds and observed luminosities of secondary x-ray radiation from intruded pollutants. We found intense flux of secondary x-rays from the intruded pollutants when heavy dust and monsoon clouds were brought up by dust storms and monsoon drift in the lower atmosphere over Udaipur city as compared to normal days. Thus, secondary x-rays in the environment provide a tool for investigation of local intrusive pollutant components in the lower atmosphere.
Jaaffrey A. S. N.
Shubhra Tiwari
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