Garg Informal 3

 

 

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., 1978

E-mail: garg@nd.edu
Address: NSH 211 or try NSH 124
Phone: (574) 631-7352 or try (574)631-7716
Fax: (574) 631-5952

Research Group Web Site: http://sites.nd.edu/garg-group/

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. 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 wobbling motion (akin to rotation of an asymmetric top) in nuclei. Both these phenomena are characteristic of triaxial nuclei, a rare and exotic shape--an ellipsoid with all three axes unequal.

Selected Publications

“Longitudinal Wobbling Motion in 187Au,” N. Sensharma, U. Garg et al., Phys. Rev. Lett. 124, 052501 (2020).

“Compression-mode resonances in the calcium isotopes and implications for the asymmetry term in nuclear incompressibility,” K.B. Howard, U. Garg et al., Phys. Lett. B 801,135185 (2020).

"Two-phonon wobbling in 135Pr," N. Sensharma, U. Garg et al., Phys. Lett. B 792, 170 (2019).

"Where we stand on structure dependence of ISGMR in the Zr-Mo region: Implications on K∞ ,"  K.B. Howard, U. Garg, Y. K. Gupta, and M. N. Harakeh, Eur. Phys. J. A 55, 228 (2019).

Honors and Activities

  • Fellow, American Association for Advancement of Science
  • Fellow of the American Physical Society
  • Recipient of "The Faculty Award", 2018
  • Fulbright Specialist Award, 2015-2019
  • Guest Professor, Xi’an Jiaotong University 2019-
  • Guest Professor, Peking University, China, 2015-
  • Adjunct Professor, Tata Institute of Fundamental Research, India, 2014-
  • JSPS Fellow, RIKEN, Japan, 2012
  • PKU Fellow, Peking University, China, 2012
  • EMMI Visiting Professor, GSI, Germany, 2011
  • Guest scientist at the Argonne National Laboratory (since 1983)
  • Recipient of the 2006 Kaneb Award for Excellence in Teaching
  • Recipient of the inaugural Terrence Akai Award for Service to International Students
  • Director of the Department of Physics Research Experience for Undergraduates (REU) program (since 2000)

 

Prof. Garg CV - July 2020