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Over the past 25 years, attempts to detect an inverted Gaussian-shaped decrease in \(\gamma \) -ray flux during total solar eclipses have produced inconsistent results. This study introduces an optimized setup using four large-volume NaI(Tl) scintillation detectors to measure \(\gamma \) -ray flux during the 22 July 2009 eclipse from two locations: Indore and Siliguri. Elevated detectors minimized terrestrial interference, but rain-induced radon daughters complicated analysis. A RooFit-based method combining exponential and Gaussian functions was developed to unify energy spectra and address rain effects. A novel technique isolated true background, reducing rain-affected \(\gamma \) -ray flux by over half. This improved setup and analysis provide a foundational approach for future eclipse experiments.

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Development of Experimental Setup and Enhanced Analytical Methodologies to Study Cosmic \(\gamma \) -Ray Flux Variations During Total Solar Eclipses

  • 会议论文

  • 发表日期：

    2025年

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  • Pranaba K. Nayak,
  • Shashi R. Dugad,
  • Sunil K. Gupta,
  • Atul Jain,
  • Indranil Mazumdar,
  • Pravata K. Mohanty,
  • Supriya Das,
  • Sanjay K. Ghosh,
  • Dhruba Gupta,
  • Sibaji Raha,
  • Swapan K. Saha,
  • Sumana Singh,
  • Arunava Bhadra

摘要

Over the past 25 years, attempts to detect an inverted Gaussian-shaped decrease in \(\gamma \) -ray flux during total solar eclipses have produced inconsistent results. This study introduces an optimized setup using four large-volume NaI(Tl) scintillation detectors to measure \(\gamma \) -ray flux during the 22 July 2009 eclipse from two locations: Indore and Siliguri. Elevated detectors minimized terrestrial interference, but rain-induced radon daughters complicated analysis. A RooFit-based method combining exponential and Gaussian functions was developed to unify energy spectra and address rain effects. A novel technique isolated true background, reducing rain-affected \(\gamma \) -ray flux by over half. This improved setup and analysis provide a foundational approach for future eclipse experiments.