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NSR database version of April 26, 2024.

Search: Author = R.Pohl

Found 12 matches.

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2023AD02      Eur.Phys.J. A 59, 15 (2023)

A.Adamczak, A.Antognini, N.Berger, T.E.Cocolios, N.Deokar, Ch.E.Dullmann, A.Eggenberger, R.Eichler, M.Heines, H.Hess, P.Indelicato, K.Kirch, A.Knecht, J.J.Krauth, J.Nuber, A.Ouf, A.Papa, R.Pohl, E.Rapisarda, P.Reiter, N.Ritjoho, S.Roccia, M.Seidlitz, N.Severijns, K.von Schoeler, A.Skawran, S.M.Vogiatzi, N.Warr and F.Wauters

Muonic atom spectroscopy with microgram target material

doi: 10.1140/epja/s10050-023-00930-y
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2021KR03      Nature(London) 589, 527 (2021)

J.J.Krauth, K.Schuhmann, M.A.Ahmed, F.D.Amaro, P.Amaro, F.Biraben, T.-L.Chen, D.S.Covita, A.J.Dax, M.Diepold, L.M.P.Fernandes, B.Franke, S.Galtier, A.L.Gouvea, J.Gotzfried, T.Graf, T.W.Hansch, J.Hartmann, M.Hildebrandt, P.Indelicato, L.Julien, K.Kirch, A.Knecht, Y.-W.Liu, J.Machado, C.M.B.Monteiro, F.Mulhauser, B.Naar, T.Nebel, F.Nez, J.M.F.dos Santos, J.P.Santos, C.I.Szabo, D.Taqqu, J.F.C.A.Veloso, J.Vogelsang, A.Voss, B.Weichelt, R.Pohl, A.Antognini, F.Kottmann

Measuring the α-particle charge radius with muonic helium-4 ions

ATOMIC PHYSICS ⁴He; measured frequencies; deduced resonances, isotope shifts, 2S-2P transitions in the muonic helium-4 ion that yields a precise determination of the root-mean-square charge radius of the α particle. Comparison with available data.

doi: 10.1038/s41586-021-03183-1
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Data from this article have been entered in the XUNDL database. For more information, click here.

2020AN04      Phys.Rev. C 101, 054313 (2020)

A.Antognini, N.Berger, T.E.Cocolios, R.Dressler, R.Eichler, A.Eggenberger, P.Indelicato, K.Jungmann, C.H.Keitel, K.Kirch, A.Knecht, N.Michel, J.Nuber, N.S.Oreshkina, A.Ouf, A.Papa, R.Pohl, M.Pospelov, E.Rapisarda, N.Ritjoho, S.Roccia, N.Severijns, A.Skawran, S.M.Vogiatzi, F.Wauters, L.Willmann

Measurement of the quadrupole moment of ¹⁸⁵Re and ¹⁸⁷Re from the hyperfine structure of muonic X rays

ATOMIC PHYSICS ^185,187Re, ²⁰⁸Pb(μ^-, μ^-'), E at 29 MeV/c, [negative muon beam from the decay of pions produced in C(p, π), E=590 MeV]; measured Eγ, Iγ, energy and intensities of muonic x-rays using two HPGe detectors at the HIPA facility of Paul Scherrer Institut; deduced hyperfine splitting of the 5g to 4f muonic atom transitions, and compared to state-of-the-art atomic theoretical predictions; extracted spectroscopic quadrupole moments for ground states of ¹⁸⁵Re and ¹⁸⁷Re.

NUCLEAR MOMENTS ^185,187Re; measured muonic atom hyperfine structure; deduced spectroscopic quadrupole moments of ground states. Comparison with previous experimental measurement using natural Re target, and with theoretical predictions.

doi: 10.1103/PhysRevC.101.054313
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2018DI10      Ann.Phys.(New York) 396, 220 (2018)

M.Diepold, B.Franke, J.J.Krauth, A.Antognini, F.Kottmann, R.Pohl

Theory of the Lamb Shift and fine structure in muonic ⁴He ions and the muonic ³He-⁴He Isotope Shift

doi: 10.1016/j.aop.2018.07.015
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2016KR02      Ann.Phys.(New York) 366, 168 (2016)

J.J.Krauth, M.Diepold, B.Franke, A.Antognini, F.Kottmann, R.Pohl

Theory of the n=2 levels in muonic deuterium

ATOMIC PHYSICS ²H; analyzed Lamb shift, fine- and hyperfine structure of the 2S and 2P states in muonic deuterium, term-by-term comparison of all available sources reveals reliable values and uncertainties of the QED and nuclear structure-dependent contributions to the Lamb shift; deduced resolution of discrepancies between different sources, in particular for the difficult two-photon exchange contributions.

doi: 10.1016/j.aop.2015.12.006
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2010PO04      Nature(London) 466, 213 (2010)

R.Pohl, A.Antognini, F.Nez, F.D.Amaro, F.Biraben, J.M.R.Cardoso, D.S.Covita, A.Dax, S.Dhawan, L.M.P.Fernandes, A.Giesen, T.Graf, T.W.Hansch, P.Indelicato, L.Julien, C.-Y.Kao, P.Knowles, E.-O.Le Bigot, Y.-W.Liu, J.A.M.Lopes, L.Ludhova, C.M.B.Monteiro, F.Mulhauser, T.Nebel, P.Rabinowitz, J.M.F.dos Santos, L.A.Schaller, K.Schuhmann, C.Schwob, D.Taqqu, J.F.C.A.Veloso, F.Kottmann

The size of the proton

NUCLEAR REACTIONS ¹H(μ^-, X), E~5 keV; measured x-rays; deduced proton radius, Lamb shift. Comparison with CODATA.

doi: 10.1038/nature09250 Letter
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2004HO17      Phys.Rev. A 70, 012504 (2004)

M.Hori, J.Eades, E.Widmann, T.Yamazaki, R.S.Hayano, T.Ishikawa, H.A.Torii, T.von Egidy, F.J.Hartmann, B.Ketzer, C.Maierl, R.Pohl, M.Kumakura, N.Morita, D.Horvath, I.Sugai

Populations and lifetimes in the v=n-l-1=2 and 3 metastable cascades of (p-bar)He⁺ measured by pulsed and continuous antiproton beams

ATOMIC PHYSICS He(p-bar, X), E at rest; measured antiprotonic helium level populations, lifetimes. Laser spectroscopy.

doi: 10.1103/PhysRevA.70.012504
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2001KE04      Eur.Phys.J. D 13, 305 (2001)

B.Ketzer, T.von Egidy, F.J.Hartmann, C.Maierl, R.Pohl, J.Eades, E.Widmann, T.Yamazaki, M.Kumakura, N.Morita, R.S.Hayano, M.Hori, T.Ishikawa, H.A.Torii, I.Sugai, D.Horvath

Collisional Quenching of Metastable States of Antiprotonic Helium by Hydrogen and Deuterium Molecules

NUCLEAR REACTIONS He(p-bar, X), E at rest; measured annihilation rates in antiprotonic helium, quenching due to molecular collisions.

ATOMIC PHYSICS He(p-bar, X), E at rest; measured annihilation rates in antiprotonic helium, quenching due to molecular collisions.

doi: 10.1007/s100530170246
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2000HA24      Nucl.Phys. A663-664, 955c (2000)

R.S.Hayano, J.Eades, T.von Egidy, F.J.Hartmann, M.Hori, D.Horvath, T.Ishikawa, B.Ketzer, M.Kumakura, C.Maierl, N.Morita, R.Pohl, I.Sugai, H.A.Torii, E.Widmann, T.Yamazaki, for the CERN-PS205 and ASACUSA Collaboration

Laser Spectroscopy of Antiprotonic Helium and Stringent Constraint on the Antiproton Charge and Mass

ATOMIC PHYSICS ⁴He(p-bar, X), E at rest; measured antiprotonic helium energy levels. Laser spectroscopy.

doi: 10.1016/S0375-9474(99)00806-4
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2000PO33      Hyperfine Interactions 127, 161 (2000)

R.Pohl, F.Biraben, C.A.N.Conde, C.Donche-Gay, T.W.Hansch, F.J.Hartmann, P.Hauser, V.W.Hughes, O.Huot, P.Indelicato, P.Knowles, F.Kottmann, Y.-W.Liu, F.Mulhauser, F.Nez, C.Petitjean, P.Rabinowitz, J.M.F.dos Santos, L.A.Schaller, H.Schneuwly, W.Schott, L.M.Simons, D.Taqqu, F.Trehin, J.F.C.A.Veloso

Experiment to measure the Lamb shift in muonic hydrogen

ATOMIC PHYSICS, Mesic-atoms ¹H(μ^-, X), E=low; measured muonic atoms kinetic energy distribution; deduced metastable state population. Application to proposed experiment discussed.

doi: 10.1023/A:1012679114531
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1998HA50      Phys.Rev. A58, 3604 (1998)

F.J.Hartmann, B.Ketzer, C.Maierl, R.Pohl, T.von Egidy, R.S.Hayano, M.Hori, T.Ishikawa, H.Tamura, H.A.Torii, M.Kumakura, N.Morita, I.Sugai, D.Horvath, J.Eades, E.Widmann, T.Yamazaki

Laser Spectroscopy of Metastable States in the ν = 2 Cascade of Antiprotonic ³He

NUCLEAR REACTIONS ³He(p-bar, X), E at rest; measured pion spectra, annihilation times; deduced target pressure dependence of antiprotonic ³He metastable states lifetimes. Resonant laser deexcitation.

ATOMIC PHYSICS ³He(p-bar, X), E at rest; measured pion spectra, annihilation times; deduced target pressure dependence of antiprotonic ³He metastable states lifetimes. Resonant laser deexcitation.

doi: 10.1103/PhysRevA.58.3604
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1997WI10      Phys.Lett. 404B, 15 (1997)

E.Widmann, J.Eades, T.Yamazaki, H.A.Torii, R.S.Hayano, M.Hori, T.Ishikawa, M.Kumakura, N.Morita, I.Sugai, F.J.Hartmann, T.von Egidy, B.Ketzer, C.Maierl, R.Pohl, D.Horvath

Hyperfine Structure of the Metastable (p-bar)He⁺ Atomcule Revealed by a Laser-Induced (n, l) = (37, 35) → (38, 34) Transition

ATOMIC PHYSICS He(p-bar, X), E=low; analyzed data; deduced metastable (p-bar)He⁺ metastable atomcule hfs.

doi: 10.1016/S0370-2693(97)00538-8
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