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<p>The phenomenon of vanishingly small scattering cross-section of low-energy electron beam in noble gases like argon and xenon, commonly known as the Ramsauer-Townsend effect, can be explained by the method of partial cross-sections. In this article, the Coulomb potential inside noble gas atoms is modeled as a rectangular well potential, and the resonant transmission of a low-energy electron beam through the well is studied quantitatively and systematically. The approach provides a satisfactory explanation of the Ramsauer-Townsend effect and is within the reach of an undergraduate audience.</p>

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Resonant Transmission Through Rectangular Potential Well

  • 期刊论文

  • 发表日期：

    2026年2月25日

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  • S. Bose,
  • J. Mitra,
  • Pintu Mandal

摘要

The phenomenon of vanishingly small scattering cross-section of low-energy electron beam in noble gases like argon and xenon, commonly known as the Ramsauer-Townsend effect, can be explained by the method of partial cross-sections. In this article, the Coulomb potential inside noble gas atoms is modeled as a rectangular well potential, and the resonant transmission of a low-energy electron beam through the well is studied quantitatively and systematically. The approach provides a satisfactory explanation of the Ramsauer-Townsend effect and is within the reach of an undergraduate audience.