Université de Fribourg

Ramsauer-Townsend effect in muonic atom scattering

Mulhauser, Françoise ; Adamczak, A. ; Beer, G. A. ; Bystritsky, V. M. ; Filipowicz, M. ; Fujiwara, M. C. ; Huber, T. M. ; Huot, Olivier ; Jacot-Guillarmod, R. ; Kammel, P. ; Kim, S. K. ; Knowles, Paul E. ; Kunselman, A. R. ; Marshall, G. M. ; Olin, A. ; Petitjean, C. ; Porcelli, T. A. ; Schaller, Lukas A. ; Stolupin, V. A. ; Woźniak, J. ; Zmeskal, J.

In: Physical Review A, 2006, vol. 73, p. 034501

We present the final results of an experimental study of µd and µt atom scattering in solid hydrogen cooled to 3 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 µd and...

Université de Fribourg

Experimental study of µ-atomic and µ-molecular processes in pure helium and deuterium-helium mixtures

Bystritsky, V. M. ; Boreiko, V. F. ; Czapliński, W. ; Filipowicz, M. ; Gerasimov, V. V. ; Huot, Olivier ; Knowles, P. E. ; Mulhauser, Françoise ; Pavlov, V. N. ; Popov, N. P. ; Schaller, Lukas A. ; Schneuwly, Hubert ; Sandukovsky, V. G. ; Stolupin, V. A. ; Volnykh, V. P. ; Woźniak, J.

In: Physical Review A, 2005, vol. 71, p. 032723

We present experimental results of µ-atomic and µ-molecular processes induced by negative muons in pure helium and helium-deuterium mixtures. The experiment was performed at the Paul Scherrer Institute (Switzerland). We measured relative intensities of muonic x-ray K series transitions in (µ3,4He)* atoms in pure helium as well as in...

Université de Fribourg

Muon capture by ³He nuclei followed by proton and deuteron production

Bystritsky, V. M. ; Boreiko, V. F. ; Filipowicz, M. ; Gerasimov, V. V. ; Huot, Olivier ; Knowles, Paul E. ; Mulhauser, Françoise ; Pavlov, V. N. ; Schaller, Lukas A. ; Schneuwly, Hubert ; Sandukovsky, V. G. ; Stolupin, V. A. ; Volnykh, V. P. ; Woźniak, J.

In: Physical Review A, 2004, vol. 69, p. 012712-12727

The paper describes an experiment aimed at studying muon capture by He nuclei in pure ³He and D₂+³He mixtures at various densities. Energy distributions of protons and deuterons produced via µ₋+³He-->p + n + n + νµ and µ₋+³He-->d + n + νµ are measured for the energy intervals 10–49 MeV and 13–31 MeV, respectively. Muon capture rates lambdacapp(ΔEp) and...