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We present the results of experimental and theoretical study of thescattering of low energy p$\mu$ atoms in solid hydrogen cooled to 3 K. Theresulting emission of low energy p$\mu$ atoms from the hydrogen layer into theadjacent vacuum was much higher than that predicted by calculations whichignored the solid nature of the hydrogen. New differential scattering crosssections have been calculated for the collisions of p$\mu$ atoms on solidhydrogen to acount for its quantum crystalline nature. Analysis of theexperimental data performed using such cross sections shows the important roleof the coherent scattering in p$\mu$ atom diffusion. For p$\mu$ energies lowerthan the Bragg cutoff limit (2 meV) the elastic Bragg scattering vanishes whichmakes the total scattering cross section fall by several orders of magnitude,and thus the hydrogen target becomes transparent allowing the emission of coldp$\mu$ atoms to occur.Comment: revtex4, 15 pages, 19 figures, 6 tables, submitted to PRA, revise

physical review. a, atomic, molecular, and optical physics/physical review, a, atomic, molecular, and optical physics

Scattering of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi><mml:mi>μ</mml:mi></mml:math>muonic atoms in solid hydrogen

Scattering ofpμmuonic atoms in solid hydrogen