Bulletin of the American Physical Society
2011 Fall Meeting of the APS Division of Nuclear Physics
Volume 56, Number 12
Wednesday–Saturday, October 26–29, 2011; East Lansing, Michigan
Session 1WA: Workshop on New Insights in Nuclear Physics and Astrophysics from Stopped and Reaccelerated Rare Isotopes I |
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Chair: Alejandro Garcia, University of Washington Room: 103AB |
Wednesday, October 26, 2011 8:30AM - 9:00AM |
1WA.00001: Weak interaction and fundamental symmetry studies with laser trapped atoms Invited Speaker: Peter Mueller Neutral atom laser traps are excellent tools to capture, confine, and manipulate radioactive isotopes. They provide high selectivity and sensitivity and allow preparing a cold sample of the isotope of interest in the center of a vacuum chamber supported only by laser light. In my talk, I will present applications of laser cooling and trapping techniques of radioactive isotopes for precision studies of fundamental symmetries and weak interactions. In particular, I will talk about the progress towards measuring the Schiff moment of $^{255}$Ra for searches of time reversal violation beyond the Standard Model and about a new experimental effort to search for possible tensor couplings in the weak decay of $^{6}$He. [Preview Abstract] |
Wednesday, October 26, 2011 9:00AM - 9:30AM |
1WA.00002: Collinear Laser Spectroscopy Studies of Rare Isotopes at NSCL Invited Speaker: Kei Minamisono The BEam COoler and LAser spectroscopy (BECOLA) facility\footnote{http://groups.nscl.msu.edu/becola/} is being installed at National Superconducting Cyclotron Laboratory at Michigan State University. BECOLA will make use of low-energy beams generated via projectile-fragmentation reactions and subsequent gas stopping,\footnote{L. Weissman et al., NIM A 540, 245 (2005).} complementing laser spectroscopy studies for charge radii and nuclear moments at ISOL facilities.\footnote{H. -J. Kluge and W. N\"{o}rtersh\"{a}user, Spectrochimica Acta B 58, 1031 (2003).} Low-energy beams with a maximum energy of 60 keV/q will be transported to a new-generation beam cooler and buncher under development, and then to the collinear laser beam line. The ion beams can be neutralized in a charge exchange cell (CEC) using reactions with alkali vapor. The ion/atom beam will be collinearly overlapped with laser light and fluorescence will be detected in coincidence with the beam bunches to increase the detection sensitivity.\footnote{A. Nieminen et al., PRL 88, 094801 (2002).} The installation of the collinear laser beam line is complete and commissioning tests are underway using stable beams from an offline ion source. On-line operation of BECOLA is foreseen to start in 2012. The earlier science program will start with charge radii measurements of the neutron-deficient K, where the new data are important for revealing single-particle evolution in the pf shell.\footnote{Z. C. Gao et al., PRC 80, 034325 (2009).} [Preview Abstract] |
Wednesday, October 26, 2011 9:30AM - 10:00AM |
1WA.00003: Nuclear astrophysics at the DRAGON recoil separator Invited Speaker: Ulrike Hager The DRAGON recoil separator facility at TRIUMF measures radiative alpha and proton capture reactions of astrophysical importance in inverse kinematics. This is done using radioactive and stable ion beams produced and accelerated using the ISAC (Isotope Separator and ACcelerator) facility in conjunction with a windowless gas target. Over the last few years, the DRAGON collaboration has embarked on a programme to measure a variety of reactions considered vital to the understanding of various astrophysical scenarios. An overview of DRAGON's separation, beam suppression, and detection capabilities will be given. In addition, examples of recent reaction cross section measurements will be discussed, such as the $^{16}$O($\alpha$,$\gamma$)$^{20}$Ne reaction, which plays an important part in the He-burning in massive stars. [Preview Abstract] |
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