Oak Ridge National Laboratory

Physics Division

Physics Division Seminars

Physics Division Seminars bring us speakers on a variety of physics related subjects. Usually these are held in the Building 6008 large Conference Room, at 3:00 pm on the chosen day, but times and locations may vary. For more information, contact our seminar chairman,

Alfredo Galindo-Uribarri
Tel (Office): (865) 574-6124  (FAX): (865) 574-1268


Thu., January 26, 2012, at 3:00 p.m. (refreshments at 2:40 p.m.)

Progress towards the search for the permanent electric dipole moment of Radium-225

Jaideep Singh, Argonne National Lab
Building 6025 Conference Room 12E

Abstract: Physics Division, We are searching for the permanent electric dipole moment (EDM) of Radium-225. In this context, a nonzero EDM is a signature of time-reversal-symmetry violating interactions within nuclei. The Ra-225 radioisotope (half-life of 15 days) is an attractive choice because, due to its unusually large nuclear deformations, it is expected to be an extraordinarily sensitive probe to these types of interactions. In our measurement scheme, Ra atoms are first laser-cooled and trapped in a magneto-optical trap. Subsequently they are transferred into an optical dipole trap, which is used to transport the atoms into the science chamber. Finally, the atoms are transferred into a more stable and confining optical dipole trap, where the measurement takes place. This work is supported by DOE, Office of Nuclear Physics, under contract No. DE-AC02-06CH11357.

Contact: (A. Galindo-Uribarri; 5746124)