Darmstadt 2008 – scientific programme
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A: Fachverband Atomphysik
A 25: Posters: Precision spectroscopy of atoms and ions
A 25.12: Poster
Thursday, March 13, 2008, 16:30–18:30, Poster C3
Spectroscopy of neutral Radium — •Aran Mol, Subhadeep De, Klaus Jungmann, Hans Wilschut, and Lorenz Willmann — KVI, University of Groningen, Groningen, The Netherlands
The heavy alkaline earth atoms radium is uniquely sensitive towards parity and time reversal symmetry violations due to a large enhancement of an intrinsic permanent electric dipole moment of the nucleous or the electron. Furthermore, radium is sensitive to atomic parity violation and the nuclear anapole moment. To prepare such experiments spectroscopy of relevant atomic states need to be done. At a later stage we will build a neutral atom trap for radium. We have built an atomic beam of the short lived isotope 225Ra with a flux of several 104 atoms/sec. We are preparing the laser spectroscopy using this beam setup. In the preparation for efficient laser cooling and trapping we have successfully trapped barium, which is similar in it’s requirements for laser cooling. The techniques which we have developed with barium can be used to trap rare radium isotopes. We report on the progress of the experiments.