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  Indian J Med Microbiol
 

Figure 2: Current-voltage characteristics of the system with electrode separation d = 3 cm for measuring the natural ions in the air inside the detector due to background radiation. Here, the radioactive source is not used

Figure 2: Current-voltage characteristics of the system with electrode separation d = 3 cm for measuring the natural ions in the air inside the detector due to background radiation. Here, the radioactive source is not used