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 NB: Neutron Rich Nuclei at the Extremes |
Hide Abstracts |
Chair: Ernst Rehm, Argonne National Laboratory Room: Auditorium |
Saturday, October 29, 2011 10:30AM - 11:06AM |
NB.00001: Nuclear structure at the limits of stability Invited Speaker: Morten Hjorth-Jensen The aim of this talk is to shed light on our understanding of many-body correlations in nuclei. Since all theoretical calculations involve effective Hamiltonians and effective Hilbert spaces, it is crucial to have a handle on the role many-body correlations play in complex many-particle systems like nuclei. This means that a sound theory should provide error estimates on the importance of neglected many-body effects. To understand these and develop mathematically rigorous error estimates is mandatory if one wants to have a predictive theory. In order to achieve the above, I will present several challenges to nuclear many-body theory and our understanding of the stability of nuclear matter. In particular, I will focus on our current understanding of many-body correlations, and how they evolve as function of the number of particles. This is of fundamental importance if we wish to use theoretical results in analysing properties of nuclei close to the drip lines. In particular, I will report on studies of weakly bound nuclei, focusing on properties like binding energies and spectroscopic factors as functions of proton-neutron asymmetry. [Preview Abstract] |
Saturday, October 29, 2011 11:06AM - 11:42AM |
NB.00002: First results from CARIBU Invited Speaker: Guy Savard The Californium Rare Ion Breeder Upgrade (CARIBU) of the ATLAS superconducting linac facility aims at providing low energy and reaccelerated neutron-rich radioactive beams to address key nuclear physics, astrophysics and application issues. These beams are obtained from fission fragments of a 1 Ci 252Cf source, thermalized and collected into a low-energy particle beam by a helium gas catcher, mass analyzed by an isobar separator, and charge breed to higher charge states for acceleration in ATLAS. The method described is fast and universal and short-lived isotope yield scale essentially with Californium fission yields. The facility is now commissioned and operating with a 100 mCi source which has yielded extracted low-energy mass separated radioactive beams at intensities in excess of 100000 ions per second. Radioactive beams have been charge bred with an efficiency of up to 12\% and reaccelerated to 6 MeV/u. Commissioning results, together with the results from first astrophysics experiments at CARIBU using the beams from the 100 mCi source will be presented. The final 1 Ci source is currently under fabrication and is expected to be installed by the end of the year. [Preview Abstract] |
Saturday, October 29, 2011 11:42AM - 12:18PM |
NB.00003: Experimental challenges to explore neutron-rich nuclei: progress and perspective of lifetime measurements with RI beams Invited Speaker: Hironori Iwasaki Studies of neutron-rich nuclei lying at the limits of stability are of great importance for understanding nuclear structure at extreme isospin, correlations of halo neutrons, as well as their impacts on astrophysical phenomena. Applications of Doppler-shift techniques to rare-isotope (RI) beam experiments have enabled level lifetime measurements of neutron-rich nuclei far from stability, offering new opportunities to investigate the evolution of nuclear shell structure and examine symmetries of nuclear many-body system. In this talk, recent progresses in lifetime measurement programs at National Superconducting Cyclotron Laboratory (NSCL) will be introduced. Experimental results on neutron-rich carbon and iron isotopes will be discussed in terms of suppressed or enhanced collectivity associated with unique shell structure of these isotopes. Future perspectives of lifetime measurements with re-accelerated RI beams and gamma-ray tracking detector arrays will also be presented. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700