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Your search keyword '"Hänsch, T. W."' showing total 193 results
Start Over Author "Hänsch, T. W." Publication Type Academic Journals
193 results on '"Hänsch, T. W."'

2. Is the proton radius a player in the redefinition of the International System of Units?

Author

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

Published
2011

3. Bose-Einstein Condensation in Microgravity

Author

van Zoest, T., Gaaloul, N., Singh, Y., Ahlers, H., Herr, W., Seidel, S. T., Ertmer, W., Rasel, E., Eckart, M., Kajari, E., Arnold, S., Nandi, G., Schleich, W. P., Walser, R., Vogel, A., Sengstock, K., Bongs, K., Lewoczko-Adamczyk, W., Schiemangk, M., Schuldt, T., Peters, A., Könemann, T., Müntinga, H., Lämmerzahl, C., Dittus, H., Steinmetz, T., Hänsch, T. W., and Reichel, J.

Published
2010
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5. The size of the proton: From the Lamb-shift in muonic hydrogen

Author

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

Published
2012
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6. The Lamb-shift experiment in Muonic helium

Author

Nebel, T., Amaro, F. D., Antognini, A., Biraben, F., Cardoso, J. M. R., Covita, D. S., Dax, A., Fernandes, L. M. P., Gouvea, A. L., Graf, T., Hänsch, T. W., Hildebrandt, M., Indelicato, P., Julien, L., Kirch, K., Kottmann, F., Liu, Y. -W., Monteiro, C. M. B., Nez, F., Santos, J. M. F. dos, Schuhmann, K., Taqqu, D., Veloso, J. F. C. A., Voss, A., and Pohl, R.

Published
2012
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12. Experiments towards resolving the proton charge radius puzzle

Author

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., Fernandes L. M. P., Franke B., Galtier S., Gouvea A. L., Götzfried J., Graf T., Hänsch T. W., Hildebrandt M., Indelicato P., Julien L., Kirch K., Knecht A., Kottmann F., Krauth J. J., Liu Y.-W., Machado J., Monteiro C. M. B., Mulhauser F., Nez F., Santos J. P., dos Santos J. M. F., Szabo C. I., Taqqu D., Veloso J. F. C. A., Voss A., Weichelt B., and Pohl R.

Subjects
Physics, QC1-999
Abstract

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.

Published
2016
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16. The Muonic Hydrogen Lamb Shift Experiment at PSI

Author

Kottmann, F., Amir, W., Biraben, F., Conde, C. A. N., Dhawan, S., Hänsch, T. W., Hartmann, F. J., Hughes, V. W., Huot, O., Indelicato, P., Julien, L., Knowles, P., Kazamias, S., Liu, Y.-W., Mulhauser, F., Nez, F., Pohl, R., Rabinowitz, P., dos Santos, J. M. F., Schaller, L. A., Schneuwly, H., Schott, W., Taqqu, D., and Veloso, J. F. C. A.

Published
2001
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19. Status of the muonic hydrogen Lamb-shift experiment

Author

Nebel, T., Amaro, F. D., Antognini, A., Biraben, F., Cardoso, J. MR, Conde, C. AN, Dax, A., Dhawan, S., Fernandes, L. MP, Giesen, A., Hänsch, T. W., Indelicato, P., Julien, L., Knowles, P. E., Kottmann, F., Le Bigot, E., Liu, Y. -W, Lopes, J. AM, Ludhova, L., Monteiro, C. MB, Mulhauser, F., Nez, F., Pohl, R., Rabinowitz, P., dos Santos, J. MF, Schaller, L. A., Schuhmann, K., Schwob, C., Taqqu, D., and Veloso, J FCA

Published
2007

20. Experimental test of special relativity by laser spectroscopy

Author

Novotny, C., Bernhardt, B., Ewald, G., Geppert, C., Gwinner, G., Hänsch, T. W., Holzwarth, R., Huber, G., Karpuk, S., Kluge, H.-J., Kühl, T., Nörtershäuser, W., Reinhardt, S., Saathoff, G., Schwalm, D., Udem, T., and Wolf, A.

Published
2007

28. The muonic hydrogen Lamb-shift experiment

Author

Pohl, R, Antognini, A, Amaro, F D, Biraben, F, Cardoso, J MR, Conde, C AN, Dax, A, Dhawan, S, Fernandes, L MP, Hänsch, T W, Hartmann, F J, Hughes, V W, Huot, O, Indelicato, P, Julien, L, Knowles, P E, Kottmann, F, Liu, Y-W, Ludhova, L, Monteiro, C MB, Mulhauser, F, Nez, F, Rabinowitz, P, dos Santos, J MF, Schaller, L A, Schwob, C, Taqqu, D, and Veloso, J FCA

Published
2005

37. Experiment to measure the Lamb shift in muonic hydrogen*

Author

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

Published
2000

38. Laser spectroscopy of the Lamb shift in muonic hydrogen

Author

Taqqu, D., Biraben, F., Conde, C. A.N., Hänsch, T. W., Hartmann, F. J., Hauser, P., Indelicato, P., Knowles, P., Kottmann, F., Mulhauser, F., Petitjean, C., Pohl, R., Rabinowitz, P., Rosenfelder, R., Santos, J. M.F., Schott, W., Simons, L. M., and Veloso, J. F.C.A.

Published
1999

42. The solar gravitational redshift from HARPS-LFC Moon spectra: A test of the general theory of relativity.

Author

González Hernández, J. I., Rebolo, R., Pasquini, L., Lo Curto, G., Molaro, P., Caffau, E., Ludwig, H.-G., Steffen, M., Esposito, M., Suárez Mascareño, A., Toledo-Padrón, B., Probst, R. A., Hänsch, T. W., Holzwarth, R., Manescau, A., Steinmetz, T., Udem, Th., and Wilken, T.

Subjects
GENERAL relativity (Physics), SOLAR system, SOLAR photosphere, SPECTRAL lines, REDSHIFT, SOLAR spectra
Abstract

Context. The general theory of relativity predicts the redshift of spectral lines in the solar photosphere as a consequence of the gravitational potential of the Sun. This effect can be measured from a solar disk-integrated flux spectrum of the Sun's reflected light on Solar System bodies. Aims. The laser frequency comb (LFC) calibration system attached to the HARPS spectrograph offers the possibility of performing an accurate measurement of the solar gravitational redshift (GRS) by observing the Moon or other Solar System bodies. Here, we analyse the line shift observed in Fe absorption lines from five high-quality HARPS-LFC spectra of the Moon. Methods. We selected an initial sample of 326 photospheric Fe lines in the spectral range between 476–585 nm and measured their line positions and equivalent widths (EWs). Accurate line shifts were derived from the wavelength position of the core of the lines compared with the laboratory wavelengths of Fe lines. We also used a CO5BOLD 3D hydrodynamical model atmosphere of the Sun to compute 3D synthetic line profiles of a subsample of about 200 spectral Fe lines centred at their laboratory wavelengths. We fit the observed relatively weak spectral Fe lines (with EW< 180 mÅ) with the 3D synthetic profiles. Results. Convective motions in the solar photosphere do not affect the line cores of Fe lines stronger than about ∼150 mÅ. In our sample, only 15 Fe I lines have EWs in the range 150< EW(mÅ) < 550, providing a measurement of the solar GRS at 639 ± 14 m s−1, which is consistent with the expected theoretical value on Earth of ∼633.1 m s−1. A final sample of about 97 weak Fe lines with EW < 180 mÅ allows us to derive a mean global line shift of 638 ± 6 m s−1, which is in agreement with the theoretical solar GRS. Conclusions. These are the most accurate measurements of the solar GRS obtained thus far. Ultrastable spectrographs calibrated with the LFC over a larger spectral range, such as HARPS or ESPRESSO, together with a further improvement on the laboratory wavelengths, could provide a more robust measurement of the solar GRS and further testing of 3D hydrodynamical models. [ABSTRACT FROM AUTHOR]

Published
2020
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47. Nonlinear laser spectroscopy

Author

Atkins, C. G., Hancock, G., Zacharias, H., Beverini, N., Galli, M., Inguscio, M., Strumia, F., Bionducci, G., Bloomfield, L. A., Gerhardt, H., Hänsch, T. W., Boulnois, J. L., Aubourg, P., Van Lerberghe, A., Agrawal, G. P., Boyd, R. W., Harter, D. J., Chen, H. L., Erbert, G. V., Garrett, W. R., Payne, M. G., Ferrell, W. R., Miller, John C., Compton, R. N., Greenland, P. T., Jackson, D. J., Wynne, J. J., Kes, P. H., Köster, E., Gao, Q. F., Raj, R. K., Bloch, D., Ducloy, M., Pini, R., Mazzoni, M., Salimbeni, R., Matera, M., Lin, C., Raimond, J. M., Goy, P., and Haroche, S.

Published
1982
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