Observation of the 1S–2P Lyman-α transition in antihydrogen
| العنوان: | Observation of the 1S–2P Lyman-α transition in antihydrogen |
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| المؤلفون: | Sandra C. Jones, Takamasa Momose, G. Stutter, Robert Thompson, M. C. Fujiwara, A. Khramov, Svante Jonsell, D. M. Starko, C. Carruth, C. J. Baker, J. J. Munich, R. L. Sacramento, Petteri Pusa, M. E. Hayden, P. Knapp, N. Evetts, M. A. Johnson, J. M. Jones, D. P. van der Werf, C. L. Cesar, M. Ahmadi, Francis Robicheaux, C. Ø. Rasmussen, K. Olchanski, Jonathan Wurtele, J. T. K. McKenna, Niels Madsen, T. D. Tharp, D. M. Silveira, M. Sameed, S. Cohen, Eric Hunter, A. Olin, A. Capra, D. R. Gill, S. Menary, R. Collister, William Bertsche, Chukman So, D. Maxwell, E. Sarid, Stefan Eriksson, T. Friesen, C. A. Isaac, Leonid Kurchaninov, M. Charlton, J. S. Hangst, W. N. Hardy, A. Evans, Joel Fajans, J. M. Michan, B. X. R. Alves |
| المساهمون: | Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, ALPHA |
| المصدر: | Nature Nature, 2018, 561 (7722), pp.211-215. ⟨10.1038/s41586-018-0435-1⟩ Ahmadi, M, Alves, B X R, Baker, C J, Bertsche, W, Capra, A, Carruth, C, Cesar, C L, Charlton, M, Cohen, S, Collister, R, Eriksson, S, Evans, A, Evetts, N, Fajans, J, Friesen, T, Fujiwara, M C, Gill, D R, Hangst, J S, Hardy, W N, Hayden, M E, Hunter, E D, Isaac, C A, Johnson, M A, Jones, J M, Jones, S A, Jonsell, S, Khramov, A, Knapp, P, Kurchaninov, L, Madsen, N, Maxwell, D, McKenna, J T K, Menary, S, Michan, J M, Momose, T, Munich, J J, Olchanski, K, Olin, A, Pusa, P, Rasmussen, C O, Robicheaux, F, Sacramento, R L, Sameed, M, Sarid, E, Silveira, D M, Starko, D M, Stutter, G, So, C, Tharp, T D, Thompson, R I, van der Werf, D P & Wurtele, J S 2018, ' Observation of the 1S-2P Lyman-alpha transition in antihydrogen ', Nature, vol. 561, no. 7722, pp. 211-+ . https://doi.org/10.1038/s41586-018-0435-1 Nature, vol 561, iss 7722 Bertsche, W, Ahmadi, M, Alves, B X R, Baker, C J, Capra, A, Carruth, C, Cesar, C L, Charlton, M, Cohen, S, Collister, R, Eriksson, S, Evans, A, Evetts, N, Fajans, J, Friesen, T & Fujiwara, M C 2018, ' Observation of the 1S-2P Lyman-alpha transition in antihydrogen ', Nature-London-, vol. 561, no. 7722, 7722, pp. 211-215 . https://doi.org/10.1038/s41586-018-0435-1 |
| بيانات النشر: | Springer Science and Business Media LLC, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Letter, General Science & Technology, ATOMIC-HYDROGEN, 7. Clean energy, 01 natural sciences, trapped antihydrogen, spectrum, 010305 fluids & plasmas, Nuclear physics, Physics in General, Laser cooling, 0103 physical sciences, Atom, antimatter, transition: frequency, Physics::Atomic Physics, cpt, 010306 general physics, Antihydrogen, Spectroscopy, symmetry, antihydrogen, Physics, SPECTRUM, Multidisciplinary, precision measurement, TRAPPED ANTIHYDROGEN, [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph], Redshift, 3. Good health, 13. Climate action, atomic physics, atomic-hydrogen, Antimatter, Excited state, Exotic atoms and molecules, Experimental particle physics, radiation: laser, Hydrogen spectral series |
| الوصف: | In 1906, Theodore Lyman discovered his eponymous series of transitions in the extreme-ultraviolet region of the atomic hydrogen spectrum1,2. The patterns in the hydrogen spectrum helped to establish the emerging theory of quantum mechanics, which we now know governs the world at the atomic scale. Since then, studies involving the Lyman-α line—the 1S–2P transition at a wavelength of 121.6 nanometres—have played an important part in physics and astronomy, as one of the most fundamental atomic transitions in the Universe. For example, this transition has long been used by astronomers studying the intergalactic medium and testing cosmological models via the so-called ‘Lyman-α forest’3 of absorption lines at different redshifts. Here we report the observation of the Lyman-α transition in the antihydrogen atom, the antimatter counterpart of hydrogen. Using narrow-line-width, nanosecond-pulsed laser radiation, the 1S–2P transition was excited in magnetically trapped antihydrogen. The transition frequency at a field of 1.033 tesla was determined to be 2,466,051.7 ± 0.12 gigahertz (1σ uncertainty) and agrees with the prediction for hydrogen to a precision of 5 × 10−8. Comparisons of the properties of antihydrogen with those of its well-studied matter equivalent allow precision tests of fundamental symmetries between matter and antimatter. Alongside the ground-state hyperfine4,5 and 1S–2S transitions6,7 recently observed in antihydrogen, the Lyman-α transition will permit laser cooling of antihydrogen8,9, thus providing a cold and dense sample of anti-atoms for precision spectroscopy and gravity measurements10. In addition to the observation of this fundamental transition, this work represents both a decisive technological step towards laser cooling of antihydrogen, and the extension of antimatter spectroscopy to quantum states possessing orbital angular momentum. The observation of the 1S–2P Lyman-α transition in the antihydrogen atom, the antimatter counterpart of hydrogen, is reported. |
| وصف الملف: | application/pdf |
| تدمد: | 1476-4687 0028-0836 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1ae9435b035facc15b974fcf756610d https://doi.org/10.1038/s41586-018-0435-1 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....d1ae9435b035facc15b974fcf756610d |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 14764687 00280836 |
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