Bulletin of the American Physical Society
2016 Fall Meeting of the APS Division of Nuclear Physics
Volume 61, Number 13
Thursday–Sunday, October 13–16, 2016; Vancouver, BC, Canada
Session 1WC: Atomic Physics for Nuclear Physics and Vice Versa IInvited
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Sponsoring Units: DNP Chair: John Behr, TRIUMF Room: Junior Ballroom C |
Thursday, October 13, 2016 9:00AM - 9:36AM |
1WC.00001: Neutral atom traps of rare isotopes Invited Speaker: Peter Mueller Laser cooling and trapping techniques offer exquisite control of an atom’s external and internal degrees of freedom. The species of interest can be selectively captured, cooled close to absolute zero temperatures, and observed with high signal-to-noise ratio. Moreover, the atom’s electronic and magnetic state populations can be precisely manipulated and interrogated. Applied in nuclear physics, these techniques are ideal for precision measurements in the fields of fundamental interactions and symmetries, nuclear structure studies, and isotopic trace analysis. In particular, they offer unique opportunities in the quest for physics beyond the standard model. I will shortly review the basics of this approach and the state of the field and then cover in more details recent results from two such efforts: the search for a permanent electric dipole moment in $^{225}$Ra and the beta-neutrino angular correlation measurement with laser trapped $^6$He. [Preview Abstract] |
Thursday, October 13, 2016 9:36AM - 10:12AM |
1WC.00002: Frequency Shifts in Neutron Electric Dipole Moment Experiments Invited Speaker: Brad Filippone Searches for the Electric Dipole Moment (EDM) of the free neutron are sensitive to new sources of Charge-Parity (CP) symmetry violation. Typically, the frequency of precession of the neutron's spin in a magnetic field is measured for different values of a parallel electric field. A frequency shift correlated with the direction and magnitude of the electric field is proportional to the EDM. Most modern searches for the neutron EDM rely on the well-known Ramsey separated-oscillatory-field technique. This technique will be discussed and contrasted with two new techniques being developed for a new neutron EDM search at the Spallation Neutron Source at ORNL. [Preview Abstract] |
Thursday, October 13, 2016 10:12AM - 10:48AM |
1WC.00003: Atomic techniques for nuclear structure physics Invited Speaker: Matthew Pearson There are few properties of atomic nuclei more fundamental than their shape, size and spin. Laser spectroscopy offers a highly sensitive, non destructive method of probing these properties by utilising the hyperfine interaction. This interaction between the nucleus and its surrounding electrons allows for a variety of highly precise, efficient atomic techniques to be employed whilst causing minimal disturbance to the nucleus being studied. When carried out at a radioactive beam facility where long chains of isotopes are available this results in a detailed knowledge of the evolution of the nuclear shape from stability out to the extremes of the nuclear chart. This talk will cover several different laser spectroscopy techniques currently in use. These include collinear laser spectroscopy as well as laser probing of radioactive atoms confined within a Magneto-optical trap. In addition the extraction of nuclear parameters such as ground state moments and mean squared charge radii from the measured atomic spectra will be explained. [Preview Abstract] |
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