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SUMMARY:“Precision Mass Measurement: ωcyclotron is not qB/m\, does E=mc
 2?” - Professor Dave Pritchard\, Cecil and Ida Green Professor of Physic
 s\, MIT
DTSTART:20121107T160000Z
DTEND:20121107T170000Z
UID:TALK40695@talks.cam.ac.uk
CONTACT:Leona Hope-Coles
DESCRIPTION:We have developed an ion balance that has improved atomic and 
 molecular mass measurement accuracy beyond 10-11.  It compares the cyclotr
 on frequency of two individual molecular or atomic ions trapped in a unifo
 rm magnetic field to find the mass ratio.  Besides improving the mass of f
 undamental particles\, we have discovered a correction to the cyclotron re
 sonance formula\, enabled a new route to determining the fine structure co
 nstant using simple physics\, made the best measurement of the dipole mome
 nt of any charged molecule\, recalibrated the x-ray wavelength standard\, 
 enabled a possible route to replace the artifact kilogram with an atomic m
 ass standard\, and made a precise test of E=mc2. We can also weigh chemica
 l bonds.
LOCATION:Pippard Lecture Theatre\, Cavendish Laboratory
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