• A new interpretation of an event attributed to a magnetic monopole

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      https://www.ias.ac.in/article/fulltext/pram/010/02/0131-0141

    • Keywords

       

      Monopole; ultraheavy cosmic ray nuclei; electron capture; electron stripping; effective charge

    • Abstract

       

      An alternate and a new interpretation is given for the event attributed to a magnetic monopole by Price and coworkers found in an emulsion plastic sandwich stack flown from Sioux City, Iowa, USA on 18 September 1973. The electron pick-up and stripping cross-sections of nuclei ofZ∼70–80 andv∼0.6–0.7c in Lexan polycarbonate are calculated using the formulae given by Nikolaev. It is shown that the corresponding mean free paths are of the order of thickness (∼250µ) of Lexan plastic sheets used by them. In such a case asnapshot of these processes is believed to have been observed in plastic sheets. Monte-Carlo simulations of the event have been made for three values of charges at the top of the main Lexan stack, namelyZ=83, 78 and 70 respectively. The event is thus interpreted as a cosmic ray nucleus ofZ=70–83 andv=0.6–0.7c losing and capturing electrons (mainly the latter) as it passes through the stack. The probability of the occurrence of such an event is estimated by several methods.

    • Author Affiliations

       

      N Durgaprasad1 M V S Rao1

      1. Tata Institute of Fundamental Research, Bombay - 400 005
    • Dates

       
  • Pramana – Journal of Physics | News

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