| Issue |
Europhys. Lett.
Volume 54, Number 3, May 2001
|
|
|---|---|---|
| Page(s) | 313 - 319 | |
| Section | Atomic and molecular physics | |
| DOI | https://doi.org/10.1209/epl/i2001-00243-1 | |
| Published online | 01 December 2003 | |
Experimental verification of Coulomb de-excitation in pionic hydrogen
1
IPP, Institute for Particle Physics, ETH Zürich -
CH-8093 Zürich, Switzerland
2
PSI, Paul-Scherrer-Institut - CH-5232 Villigen-PSI,
Switzerland
3
Physics Department, University of Virginia -
Charlottesville, Virginia 22901, USA
Received:
18
October
2000
Accepted:
20
February
2001
The neutron time-of-flight spectrum from the reaction 
was measured in order to study the
acceleration mechanisms in the atomic cascade of pionic hydrogen.
For the first time, discrete "high-energy"components up to
about 200
were found in hydrogen gas. The earlier findings
of discrete components in liquid hydrogen are confirmed in a
model-independent way, and for the first time, indications of
transitions with 
are observed.
PACS: 36.10.Gv – Mesonic atoms and molecules, hyperonic atoms and molecules / 25.80.Gn – Pion charge-exchange reactions / 13.75.Gx – Pion-baryon interactions
© EDP Sciences, 2001
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