Diffusion radius of muonic hydrogen atoms in H-D gas

Details Diffusion radius of muonic hydrogen atoms in H-D gas Diffusion radius of muonic hydrogen atoms in H-D gas

2006-09-18

arxiv.org/abs/physics/0609146v1

Physics

Atomic Physics

8 pages, 10 figures, 1 table

Scientific paper

The diffusion radius of the 1S muonic hydrogen atoms in gaseous H_2 targets with various deuterium admixtures has been determined for temperatures T=30 and 300 K. The Monte Carlo calculations have been performed using the partial differential crosssections for $p\mu$ and $d\mu$ atom scattering from the molecules H$_2$, HD and D$_2$. These cross sections include hyperfine transitions in the muonic atoms, the muon exchange between the nuclei $p$ and $d$, and rotational-vibrational transitions in the target molecules. The Monte Carlo results have been used for preparing the time-projection chamber for the high-precision measurement of the nuclear $\mu^{-}$ capture in the ground-state $p\mu$ atom, which is now underway at the Paul Scherrer Institute.

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