Dong Sheng

Jan 20, 2011, 11:00 am12:00 pm
Jadwin 303


Event Description
Speaker: Dong Sheng Title: Progress on the measurement of the francium anapole moment Abstract: I will present the current status of the experimental effort towards the measurement of the anapole moment in francium. The anapole moment is a parity violating, time-reversal conserving nuclear moment that arises from the weak interaction among nucleons. It is nuclear spin dependent (nsd) and sensitive to the configuration of nuclear structure. Our experimental scheme is to perform a direct measurement of the nsd parity violating anapole moment, by driving a parity forbidden E1 transition between hyperfine ground states in a series of francium isotopes inside a blue detuned dipole trap at the electric anti-node of a microwave cavity. We explore on the possible tests using rubidium isotopes. The francium experiment will be moved to the ISAC radioactive beam facility of TRIUMF, Canada. The preparation of the apparatus has required further studies atomic spectroscopy, optical and microwave; and dynamics of the atoms in the traps (optical billiards). Work supported by NSF and DOE.