Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 2: Precision spectroscopy of atoms and ions I (with Q)
A 2.6: Vortrag
Montag, 17. März 2014, 11:45–12:00, BEBEL E42
Ra+ ion trapping -Atomic Parity Violation measurement and an optical clock — •Amita Mohanty, Elwin A. Dijck, Mayerlin Nunez Portela, Nivedya Valappol, Oliver Boell, Klaus Jungmann, Cornelis G. G Onderwater, Sophie Schlesser, Rob G. E. Timmermans, Lorenz Wilmann, and Hans W. Wilschut — University of Groningen, FWN, Zernikelaan 25, NL-9747AA Groningen
A single trapped Ra+ ion has an excellent potential for a precision measurement of the Weinberg mixing angle at low momentum transfer and testing thereby the electroweak running. The absolute frequencies of the transition 7s 2S1/2-7d2D3/2 at wavelength 828 nm have been determined in 212*214Ra+ to better than 19 MHz with laser spectroscopy on small samples of ions trapped in a linear Paul trap at the online facility TRIµP of KVI. The measurement of the Weinberg angle requires the localization of the ion within a fraction of an optical wavelength. The current experiments are focused on trapping and laser spectroscopy on a single Ba+ as a precursor for Ra+. Work towards single ion trapping of Ra+, including the preparation of an offline 223Ra source is in progress. Most elements of the setup for single Ra+ ion parity measurement are also well suited for realizing a most stable optical clock.