Abstract
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 T µp 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 T µp-distribution it can be concluded that a considerable part of the µp(2s) atoms is metastable at pressures of a few hPa.
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References
L. Schellenberg et al., Hyp. Interact. 101/102 (1996) 215.
P. Ackerbauer et al., Hyp. Interact. 101/102 (1996) 67.
C. Petitjean et al., PSI proposal R–97–05.1; A.A. Vorobjov, this issue.
R. Pohl, this issue.
J. Schottmüller, this issue.
L.M. Simons, this issue.
V.E. Markushin, Phys. Rev. A 50 (1994) 1137.
M. Leon and H.A. Bethe, Phys. Rev. 127 (1962) 636.
G.A. Fesenko and G.Y. Korenman, Hyp. Interact. 101/102 (1996) 91.
A. Badertscher et al., Phys. Lett. B 392 (1997) 278.
J.B. Czirr, Phys. Rev. 130 (1963) 341.
J.F. Crawford et al., Phys. Rev. D 43 (1991) 46.
E.C. Aschenauer et al., Phys. Rev. A 51 (1995) 1965.
D.J. Abbott et al., Phys. Rev. A 55(1997) 214.
D. Taqqu et al., Hyp. Interact. 101/102 (1996) 599; F.J. Hartmann et al., Hyp. Interact. 101/102 (1996) 623.
M. Bregant et al., Phys. Lett. A 241 (1998) 344.
B. Lauss et al., Phys. Rev. Lett. 80(1998) 3041.
V.E. Markushin, this issue.
M. Mühlbauer, this issue.
M. Bubak and M.P. Faifman, Communications of the Joint Institute for Nuclear Research E4–87–464 (Dubna, 1987).
A. Adamczak et al., At. Data Nucl. Data Tables 62 (1996) 255; A. Adamczak, Hyp. Interact. 101/102 (1996) 113.
V.P. Popov and V.N. Pomerantsev, Hyp. Interact. 101/102 (1996) 133.
L.I. Menshikov and L.I. Ponomarev, Z. Phys. D 2 (1986) 1.
V. Bystritsky et al., Phys. Rev. A 53 (1996) 4169.
L. Bracci and G. Fiorentini, Nuovo Cimento A 43 (1978) 9.
G. Carboni and G. Fiorentini, Nuovo Cimento B 39 (1977) 281.
G.Y. Korenman, Hyp. Interact. 101/102 (1996) 81.
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Kottmann, F., Daniel, H., Hartmann, F. et al. Kinetic energies of exotic H atoms at formation and cascade. Hyperfine Interactions 119, 3–10 (1999). https://doi.org/10.1023/A:1012651231659
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DOI: https://doi.org/10.1023/A:1012651231659