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CATEGORIES:Cavendish Physical Society
SUMMARY:“Precision Mass Measurement: ωcyclotron is not qB/
 m\, does E=mc2?” - Professor Dave Pritchard\, Ceci
 l and Ida Green Professor of Physics\, MIT
DTSTART;TZID=Europe/London:20121107T160000
DTEND;TZID=Europe/London:20121107T170000
UID:TALK40695AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/40695
DESCRIPTION:We have developed an ion balance that has improved
  atomic and molecular mass measurement accuracy be
 yond 10-11.  It compares the cyclotron frequency o
 f two individual molecular or atomic ions trapped 
 in a uniform magnetic field to find the mass ratio
 .  Besides improving the mass of fundamental parti
 cles\, we have discovered a correction to the cycl
 otron resonance formula\, enabled a new route to d
 etermining the fine structure constant using simpl
 e physics\, made the best measurement of the dipol
 e moment of any charged molecule\, recalibrated th
 e x-ray wavelength standard\, enabled a possible r
 oute to replace the artifact kilogram with an atom
 ic mass standard\, and made a precise test of E=mc
 2. We can also weigh chemical bonds.
LOCATION:Pippard Lecture Theatre\, Cavendish Laboratory
CONTACT:Leona Hope-Coles
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