Kinetic energies of exotic H atoms at formation and cascade
The complex balance of processes occurring at the cascade of exotic H-atoms is usually described by the so-called standard cascade model, but this model neglects variations of the kinetic energy T of the exotic atom during the cascade which are crucial for the analysis of several important experiments. New experimental results on Tµp at H2 pressures between 0.063 and 4 hPa demonstrate the importance of acceleration due to Coulomb de-excitation processes at highly excited µp levels n > 9. The data at the lowest density are sensitive to the initial values of the kinetic energy and n-levels at the moment of atomic capture. From the measured low-energy tail of the Tµp-distribution it can be concluded that a considerable part of the µp(2s) atoms is metastable at pressures of a few hPa.
Unable to display preview. Download preview PDF.
- L. Schellenberg et al., Hyp. Interact. 101/102 (1996) 215.Google Scholar
- P. Ackerbauer et al., Hyp. Interact. 101/102 (1996) 67.Google Scholar
- C. Petitjean et al., PSI proposal R–97–05.1; A.A. Vorobjov, this issue.Google Scholar
- R. Pohl, this issue.Google Scholar
- J. Schottmüller, this issue.Google Scholar
- L.M. Simons, this issue.Google Scholar
- V.E. Markushin, this issue.Google Scholar
- M. Mühlbauer, this issue.Google Scholar
- M. Bubak and M.P. Faifman, Communications of the Joint Institute for Nuclear Research E4–87–464 (Dubna, 1987).Google Scholar