Umesh Garg
Professor
Experimental Nuclear Physics
B.Sc., B.I.T.S., Pilani, India, 1972
M.Sc., ibid., 1974
M.A., S.U.N.Y. at Stony Brook, 1975
Ph.D., ibid., d1978
E-mail: garg@nd.edu
Address: NSH 211 or try NSH 124
Phone: (574-63)1-7352 or try (574-63)1-7716
Fax: (574-63)1-5952
Research Interests
Prof. Garg’s current research interests include experimental investigation of compressional-mode giant resonances and exotic quantal rotation in nuclei.
Giant resonances are highly collective states of nuclear vibration. The compressional-mode giant resonances provide the only direct experimental measurement of the nuclear incompressibility, a fundamental property of nuclear matter that is crucial to understanding of a number of nuclear and astrophysical phenomena, including strength of collapse in supernovae explosions, collective-flow in high-energy heavy ion collisions, and properties of neutron stars—the “largest nuclei” that exist in nature. Prof. Garg’s group has been investigating the Isoscalar Giant Dipole Resonance, an exotic compressional-oscillation, also referred to as the “squeezing mode”.
The atomic nuclei exhibit a number of interesting and exciting phenomena at large angular momenta viz. shape transitions, quenching of superfluid behavior, order-to-chaos transitions, etc. These effects are studied through the g-ray de-excitation of the nucleus following heavy-ion reactions. In recent years, Prof. Garg’s group has investigated the exotic processes of chiral rotation (yes, the nuclei can be left- or right-handed!) and “anti-magnetic” rotation in nuclei.
Selected Publications
“Isotopic Dependence of the Giant Monopole Resonance in the Even-A 112-124Sn Isotopes and the Asymmetry Term in Nuclear Incompressibility,” T. Li, U. Garg, Y. Liu, R. Marks, B.K. Nayak, P.V. Madhusudhana Rao, M. Fujiwara, H. Hashimoto, K. Kawase, K. Nakanishi, S.Okumura, M. Yosoi, M. Itoh, M. Ichikawa, R. Matsuo, T. Terazono, M. Uchida, T. Kawabata, H. Akimune, Y. Iwao, T. Murakami, H. Sakaguchi, S. Terashima, Y. Yasuda, J. Zenihiro, and M.N. Harakeh, Phys. Rev. Lett. 99, 162503 (2007).
“From Chiral Vibration to Static Chirality in 135Nd,” S. Mukhopadhyay, D. Almehed, U. Garg, S. Frauendorf, T. Li, P.V. Madhusudhana Rao, X. Wang, S.S. Ghugre, M.P. Carpenter, S. Gros, A. Hecht, R.V.F. Janssens, F.G. Kondev, T. Lauritsen, D. Seweryniak, and S. Zhu, Phys. Rev. Lett. 99, 172501 (2007).
“Direct proton decay of the isoscalar giant dipole resonance in 208Pb,” B.K. Nayak, U. Garg, M. Koss, T. Li, E. Martis, H. Fujimura, M. Fujiwara, K. Hara, K. Kawase, K. Nakanishi, E. Obayashi, H.P. Yoshida, M. Itoh, S. Kishi, H. Sakaguchi, H. Takeda, M. Uchida, Y. Yasuda, M. Yosoi, R.G.T. Zegers, H. Akimune, M.N. Harakeh, and M. Hunyadi, Phys. Lett. B 674, 281 (2009).
“Structure of 240Pu: Evidence for Octupole Phonon Condensation,” X. Wang et al., Phys. Rev. Lett. 102, 122501 (2009).
Honors and Activities:
- Fellow of the American Physical Society.
- Guest scientist at the Argonne National Laboratory. He has been a visiting professor at the Vrije Universiteit, Amsterdam, and a visiting scientist at Bhabha Atomic Research Center, Bombay, India, and at the Cyclotron Institute, Texas A&M University.
- Recipient of the 2006 Kaneb Award for Excellence in Teaching.
- Director of the Department of Physics Research Experience for Undergraduates (REU) program.
