9 documents found, page 1 of 1
Diffusion of muonic hydrogen in hydrogen gas and the measurement of the 1s hype...
Nuber, Jonas; Adamczak, A.; Abdou Ahmed, M.; Affolter, L.; Amaro, F. D.; Amaro, Pedro; Antognini, A.; Carvalho, P.; Chang, Y. -H.; Chen, T. -L.The CREMA collaboration is pursuing a measurement of the ground-state hyperfine splitting (HFS) in muonic hydrogen (μp) with 1 ppm accuracy by means of pulsed laser spectroscopy. In the proposed experiment, the μp atom is excited by a laser pulse from the singlet to the triplet hyperfine sub-levels, and is quenched back to the singlet state by an inelastic collision with a H2 molecule. The resulting increase of...
Experiments towards resolving the proton charge radius puzzle
Antognini, A.; Schuhmann, K.; Amaro, F. D.; Amaro, P.; Abdou-Ahmed, M.; Biraben, F.; Chen, T. -L.; Covita, D. S.; Dax, A. J.; Diepold, M.9 pages, Few Body Systems FB21 conference; We review the status of the proton charge radius puzzle. Emphasis is given to the various experiments initiated to resolve the conflict between the muonic hydrogen results and the results from scattering and regular hydrogen spectroscopy.; This work is supported by the Swiss National Science Foundation Projects No. 200021L_138175 and No. 200020_159755, the DFG_GR_3172/...
Precision measurement of the (3p–1s) X-ray transition in muonic hydrogen
Gotta, D.; Covita, D. S.; Anagnostopoulos, D. F.; Fuhrmann, H.; Gorke, H.; Gruber, A.; Hirtl, A.; Ishiwatari, T.; Indelicato, P.; Le Bigot, E.-O.
High-accuracy x-ray line standards in the 3-keV region
Schlesser, S.; Boucard, S.; Covita, D. S.; Santos, J. M. F. dos; Fuhrmann, H.; Gotta, D.; Gruber, A.; Hennebach, M.; Hirtl, A.; Indelicato, P.
Observation of 2p3d(¹P°)→1s3d(¹Dᵉ) Radiative Transition in He-like Si, S, and C...
Santos, José Paulo; Costa, A. M.; Kasthurirangan, S.; Saha, J. K.; Agnihotri, A. N.; Bhattacharyya, S.; Misra, D.; Kumar, A.; Mukherjee, P. K.APS, Journals Phys. Rev. Lett., Volume 111, Issue 24
Pionic Deuterium
Strauch, Th.; Amaro, F. D.; Anagnostopoulos, D. F.; Bühler, P.; Covita, D. S.; Gorke, H.; Gotta, D.; Gruber, A.; Hirtl, A.; Indelicato, P.Conf. Proc. Few Body 19 (FB19), August 31 - September 5, 2009, Bonn, Germany 9 pages, 13 figures; The strong interaction shift ∈1sπD and broadening Γ1sπD in pionic deuterium have been remeasured with high statistics by means of the πD(3p - 1s) X-ray transition using the cyclotron trap and a high-resolution crystal πD πD spectrometer. Preliminary results are ∈1sπD = (-2325 ± 31) meV (repulsive) and Γ1sπD(1171+23...
Planar LAAPDs: temperature dependence, performance, and application in low-ener...
Ludhova, L.; Amaro, F. D.; Antognini, A.; Biraben, F.; Cardoso, J. M. R.; Conde, C. A. N.; Covita, D. S.; Dax, A.; Dhawan, S.; Fernandes, L. M. P.An experiment measuring the 2S Lamb shift in muonic hydrogen ([mu]-p) was performed at the Paul Scherrer Institute, Switzerland. It required small and compact detectors for 1.9 keV X-rays (2P-1S transition) with an energy resolution around 25% at 2 keV, a time resolution better than 100 ns, a large solid angle coverage, and insensitivity to a 5 T magnetic field. We chose Large Area Avalanche Photodiodes (LAAPDs...
The Muonic Hydrogen Lamb Shift Experiment at PSI
Kottmann, F.; Amir, W.; Biraben, F.; Conde, C.; Dhawan, S.; Hänsch, T.; Hartmann, F.; Hughes, V.; Huot, O.; Indelicato, P.; Julien, L.; Knowles, P.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 p...
Experiment to measure the Lamb shift in muonic hydrogen
Pohl, R.; Biraben, F.; Conde, C. A. N.; Gay, C. Donche; Hänsch, T. W.; Hartmann, F. J.; Hauser, P.; Hughes, V. W.; Huot, O.; Indelicato, P.; Knowles, P.Abstract The contribution of the root mean square (RMS) proton charge radius to the Lamb shift (2S–2P energy difference) in muonic hydrogen (µp) amounts to 2%. Apart from the uncertainty on this charge radius, theory predicts the Lamb shift with a precision on the ppm level. We are going to measure ?E (2 S1/2(F=1)–2 P3/2(F=2)) in a laser resonance experiment to a precision of 30 ppm (i.e., 10% of the natural li...