Ramsauer-Townsend effect in muonic atom scattering

Abstract

We present the final results of an experimental study of $\ensuremath{\mu}d$ and $\ensuremath{\mu}t$ atom scattering in solid hydrogen cooled to $3\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. Strong effects resulting from the Ramsauer-Townsend effect have been observed in the TRIUMF experiment E742 where muons were stopped in thin frozen layers of hydrogen. The measured Ramsauer-Townsend minimum energy for both $\ensuremath{\mu}d$ and $\ensuremath{\mu}t$ atoms and the minimum cross section are in agreement with theory.