BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-5119
DTSTART:20190604T160000Z
DURATION:PT1H0M0S
DTSTAMP:20260415T080550Z
LAST-MODIFIED:20190529T150502Z
LOCATION:5310 Chamberlin Hall
SUMMARY:Search for permanent electric dipole moments of diamagnetic at
 oms using cold atom techniques\, Atomic Physics Seminar\, Dr. Tian Xia
 \, USTC\, Hefei\, China
DESCRIPTION:EDM measurements on diamagnetic atoms probe CP-violating e
 ffects in the nucleus. Some types of these Beyond-Standard-Model effec
 ts are known to be strongly enhanced in 225Ra due to octupole deformat
 ion of the nucleus. Other favorable characteristics of 225Ra include a
  high atomic number (Z = 88)\, a ground state of 1S0\, and a nuclear s
 pin 1/2. An EDM search is carried out on this radioactive isotope (hal
 f-life 15 d) using laser-cooled atoms. Meanwhile\, the stable isotope 
 171Yb shares several characteristics\, including 1S0 and nuclear spin 
 1/2\, and is particularly useful as a proxy of 225Ra for developing la
 ser trapping and probing techniques\, for testing various measurement 
 schemes\, and for investigating systematic errors. Furthermore\, 171Yb
  atoms can be placed within 0.1 mm of 225Ra\, and act as a co-magnetom
 eter. A laser trap of Yb atoms for an EDM measurement is under develop
 ment.
URL:https://www.physics.wisc.edu/events/?id=5119
END:VEVENT
END:VCALENDAR