TY - GEN
T1 - High-precision Ramsey-comb spectroscopy in the DUV and XUV spectral region
AU - Dreissen, L. S.
AU - Altmann, R. K.
AU - Roth, C.
AU - Eikema, K. S.E.
PY - 2017
Y1 - 2017
N2 - Quantum-electrodynamics (QED) theory has been tested with high accuracy. However, QED tests in atomic hydrogen are currently limited by the experimentally determined value of the proton charge radius. Therefore spectroscopic measurements were conducted with muonic-atoms (μH and μD) to determine the proton and the deuteron charge radii with an order of magnitude higher accuracy. However, these values also showed a > 7σ discrepancy with the CODATA-2010 values. In order to contribute to resolving this so called proton radius puzzle we have determined the EF←X transition frequency in molecular hydrogen (H2) at ~ 2 × 202 nm with almost two orders of magnitude higher accuracy than the previous result. We are also building a setup to measure the 1S-2S transition in singly ionized helium at ~ 30 nm.
AB - Quantum-electrodynamics (QED) theory has been tested with high accuracy. However, QED tests in atomic hydrogen are currently limited by the experimentally determined value of the proton charge radius. Therefore spectroscopic measurements were conducted with muonic-atoms (μH and μD) to determine the proton and the deuteron charge radii with an order of magnitude higher accuracy. However, these values also showed a > 7σ discrepancy with the CODATA-2010 values. In order to contribute to resolving this so called proton radius puzzle we have determined the EF←X transition frequency in molecular hydrogen (H2) at ~ 2 × 202 nm with almost two orders of magnitude higher accuracy than the previous result. We are also building a setup to measure the 1S-2S transition in singly ionized helium at ~ 30 nm.
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U2 - 10.1109/CLEOE-EQEC.2017.8087467
DO - 10.1109/CLEOE-EQEC.2017.8087467
M3 - Conference contribution
AN - SCOPUS:85039781135
SN - 9781509067374
T3 - Optics InfoBase Conference Papers
BT - 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
PB - IEEE
T2 - European Quantum Electronics Conference, EQEC 2017
Y2 - 25 June 2017 through 29 June 2017
ER -