Kinetic energy of pi(-)p-atoms in liquid and gaseous hydrogen

Authors
Schottmuller, J Badertscher, A Daum, M Goudsmit, PFA Janousch, M Kettle, PR Koglin, J Markushin, VE Zhao, ZG
Citation
J. Schottmuller et al., Kinetic energy of pi(-)p-atoms in liquid and gaseous hydrogen, HYPER INTER, 119(1-4), 1999, pp. 95-102
Citations number
19
Categorie Soggetti
Physics
Journal title
HYPERFINE INTERACTIONS
ISSN journal
03043843 → ACNP
Volume
119
Issue
1-4
Year of publication
1999
Pages
95 - 102
Database
ISI
SICI code
0304-3843(1999)119:1-4<95:KEOPIL>2.0.ZU;2-W
Abstract
We have measured the Doppler broadening of neutron time-of-flight spectra f rom the reaction pi(-) p --> pi(0) + n in atomic states. From the data, we infer that the kinetic energy distribution of pi(-)p-atoms in liquid and ga seous hydrogen contains discrete 'high-energy' components with energies as high as 200 eV attributed to Coulomb de-excitation. In liquid hydrogen, evi dence for Coulomb de-excitation transitions with Delta n = 2 has been found .