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https://hdl.handle.net/10316/7690
Title: | The Muonic Hydrogen Lamb Shift Experiment at PSI | Authors: | Kottmann, F. Amir, W. Biraben, F. Conde, C. Dhawan, S. Hänsch, T. Hartmann, F. Hughes, V. Huot, O. Indelicato, P. Julien, L. Knowles, P. Kazamias, S. Liu, Y.-W. Mulhauser, F. Nez, F. Pohl, R. Rabinowitz, P. Santos, J. M. F. dos Schaller, L. Schneuwly, H. Schott, W. Taqqu, D. Veloso, J. |
Issue Date: | 2001 | Citation: | Hyperfine Interactions. 138:1 (2001) 55-60 | Abstract: | Abstract A measurement of the 2S Lamb shift in muonic hydrogen (µ-p) is being prepared at the Paul Scherrer Institute (PSI). The goal of the experiment is to measure the energy difference ?E(25 P 3/2-23 S 1/2) by laser spectroscopy (?˜6µm) to a precision of 30 ppm and to deduce the root mean square (rms) proton charge radius with 10-3 relative accuracy, 20 times more precise than presently known. An important prerequisite to this experiment is the availability of long-lived µp2S -atoms. A 2S-lifetime of ~1 µs – sufficiently long to perform the laser experiment – at H2 gas pressures of 1–2 hPa was deduced from recent measurements of the collisional 2S-quenching rate. A new low-energy negative muon beam yields an order of magnitude more muon stops in a small low-density gas volume than a conventional cloud muon beam. A stack of ultra-thin carbon foils is the key element of a fast detector for keV-muons. The development of a 2 keV X-ray detector and a 3-stage laser system providing 0.5 mJ laser pulses at 6 µm is on the way. | URI: | https://hdl.handle.net/10316/7690 | DOI: | 10.1023/A:1020886314237 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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