dorsal/arxiv
View SchemaObservation of Long-Lived Muonic Hydrogen in the 2S State
| Authors | Randolf Pohl, Herbert Daniel, F. Joachim Hartmann, Peter Hauser, Franz Kottmann, Valery E. Markushin, Markus Mühlbauer, Claude Petitjean, Wolfgang Schott, David Taqqu, Peter Wojciechowski-Grosshauser |
|---|---|
| Categories | |
| ArXiv ID | physics/0610100 |
| URL | https://arxiv.org/abs/physics/0610100 |
| DOI | 10.1103/PhysRevLett.97.193402 |
Abstract
The kinetic energy distribution of ground state muonic hydrogen atoms mu-p(1S) is determined from time-of-flight spectra measured at 4, 16, and 64 hPa H2 room-temperature gas. A 0.9 keV-component is discovered and attributed to radiationless deexcitation of long-lived mu-p(2S) atoms in collisions with H2 molecules. The analysis reveals a relative population of about 1%, and a pressure-dependent lifetime (e.g. (30.4 +21.4 -9.7) ns at 64 hPa) of the long-lived mu-p(2S) population, equivalent to a 2S-quench rate in mu-p(2S) + H2 collisions of (4.4 +2.1 -1.8) 10^11 s^-1 at liquid hydrogen density.
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"date_created": "2026-03-02T18:01:15.006000Z",
"date_modified": "2026-03-02T18:01:15.006000Z",
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"abstract": "The kinetic energy distribution of ground state muonic hydrogen atoms\nmu-p(1S) is determined from time-of-flight spectra measured at 4, 16, and 64\nhPa H2 room-temperature gas. A 0.9 keV-component is discovered and attributed\nto radiationless deexcitation of long-lived mu-p(2S) atoms in collisions with\nH2 molecules. The analysis reveals a relative population of about 1%, and a\npressure-dependent lifetime (e.g. (30.4 +21.4 -9.7) ns at 64 hPa) of the\nlong-lived mu-p(2S) population, equivalent to a 2S-quench rate in mu-p(2S) + H2\ncollisions of (4.4 +2.1 -1.8) 10^11 s^-1 at liquid hydrogen density.",
"arxiv_id": "physics/0610100",
"authors": [
"Randolf Pohl",
"Herbert Daniel",
"F. Joachim Hartmann",
"Peter Hauser",
"Franz Kottmann",
"Valery E. Markushin",
"Markus M\u00fchlbauer",
"Claude Petitjean",
"Wolfgang Schott",
"David Taqqu",
"Peter Wojciechowski-Grosshauser"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevLett.97.193402",
"title": "Observation of Long-Lived Muonic Hydrogen in the 2S State",
"url": "https://arxiv.org/abs/physics/0610100"
},
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