学术报告：Nuclear Incompressibility, the Asymmetry Term, and the MEM Effect
题 目：Nuclear Incompressibility, the Asymmetry Term, and the MEM Effect报告人：Prof. Umesh Garg（University of Notre Dame/Peking University）
时 间：2012年4月 28（星期六）日上午10：30-11：30
地 点：嘉定园区学术活动中心302房间
报告简介：
The Nuclear Incompressibility parameter is one of three important components characterizing the nuclear equation of state. It has crucial bearing on diverse nuclear and astrophysical phenomena, including radii of neutron stars, strength of supernova collapse, emission of neutrinos in supernova explosions, and collective flow in medium- and high-energy nuclear collisions. In this talk I will review current status of the research on direct experimental determination of nuclear incompressibility via the compressional-mode giant resonances. In particular, recent measurements on a series of Sn and Cd isotopes have provided an "experimental" value for the asymmetry term of nuclear incompressibility. We also find that the GMR centroid energies of the in both Sn and Cd isotopes are significantly lower than the theoretical predictions, pointing to the role of superfluidityand the MEM (Mutual Enhancement of Magicity) Effect.
报告人简介：
Umesh Garg, a Professor of Physics at the University of Notre Dame, graduated from Birla Institute of Technology and Science in Pilani, India, and obtained a Ph.D. in experimental nuclear physics from the State University of New York at Stony Brook. After postdoctoral work at the Cyclotron Institute, Texas A & M University, he joined the Notre Dame faculty in 1982. He has held visiting professorships at Vrije Universiteit, Amsterdam, the Netherlands; the Bhabha Atomic Research Center, Mumbai, India; GSI, Darmstadt, Germany; the Tata Institute of Fundamental Research, Mumbai; and RIKEN, Japan. He is a Fellow of the American Physical Society and served on the Program Committee of the APS Division of Nuclear Physics during 1995-997. He has been Director of the Notre Dame Physics REU program since 2000. Currently, he is a Visiting Professor and PU Fellow at Peking University. The current focus of his research work is low-energy nuclear structure, with special emphasis on experimental determination of the nuclear incompressibility via measurements on the compression-mode giant resonances, and investigation of exotic quantal rotation in nuclei.
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