Edward Zganjar, Ph.D.

Edward Zganjar, PhD
Alumni Professor Emeritus of Physics

Ph.D., 1966 - Vanderbilt University

Louisiana State University
Department of Physics & Astronomy
221-B Nicholson Hall, Tower Dr.
Baton Rouge, LA 70803-4001
(225) 578-6842-Office

Research Interests

Experimental Nuclear Physics

Professor Zganjar continues to be active in research as a member of the experimental nuclear/experimental astrophysics group at LSU. He also continues his external collaboration with the University Radioactive Ion Beam consortium (UNIRIB). His major interest has involved the study of the fundamental structure of the atomic nucleus, with an emphasis on nuclei that lie farthest from beta stability; but he has also been active in experiments directed at fundamental symmetries, such as those involving tests of the Standard Model using superallowed beta decay. His long-standing program in experimental nuclear spectroscopy was largely conducted at the Holifield Radioactive Ion Beam Facility (HRIBF) at the Oak Ridge National Laboratory, with occasional experiments at the Argonne National Laboratory, Berkeley National Laboratory, and several European Institutions. With the closure of HRIBF, his program there will move to the NSCL (National Superconducting Cyclotron Laboratory) at Michigan State University and then to FRIB (Facility for Radioactive Ion Beams), which NSCL will transition into over the next decade. Professor Zganjar has designed and constructed highly specialized spectrometers and spectroscopic equipment to conduct his research, and to facilitate the research of his colleagues. He has been a principal collaborator on the design and construction of ORISS (Oak Ridge Isomer Spectrometer and Separator), which will have a resolution high enough to identify and separate nuclear isomers by mass.

The study of the atomic nucleus is essentially the study of a many-body system in which the particles are limited in number, interact between themselves by a short-range force, and are governed by the laws of quantum mechanics.  Because of this, the nucleus occupies a unique position within the hierarchy of many-body systems.  Its main excitations are well defined and the properties of those excitations are readily measured.  From an experimental point of view, the main advantage to studying the many-body problem via the study of the nucleus is that the parameters controlling the nuclear excitations can be varied by going from one nucleus to another.  In order to accomplish this, however, one must venture far from the line of nuclear stability (Z vs. N).  This is done by creating new, hitherto unstudied nuclear species, and is most readily accomplished at a radioactive-beam facility.  While the main emphasis of Professor Zganjar's program is the study of fundamental nuclear structure, and more recently nuclear astrophysics; parts of the program also focus on aspects of fundamental symmetries.

Current and Selected Publications

  • M. Madurga et al., "New Half-lives of r-process Zn and Ga Isotopes Measured with Electromagnetic Separation," Phys. Rev. Lett. 109, 112501 (2012).

  • J. Winger et al., "New Subshell Closure at N=58 Emerging in Neutron-rich Nuclei Beyond Ni-78," Phys. Rev. C 81, 044303 (2010).

  • J. C. Batchelder et al., "Collective and Non-collective States in Cd-116 Studied via the Beta Decays of Ag-116(m1,m2,gs)," Phys. Rev. C 80, 054304 (2009).

  • J. Winger et al., "Large Beta-delayed Neutron Emission Probabilities in the Ni-78 Region," Phys. Rev. Lett. 102, 142502 (2009).

  • E. F. Zganjar et al., "Superallowed Beta Decay Studies at TRIUMF - Nuclear Structure and Fundamental Symmetries," Acta Physica Polonica B 38, 1179-1194 (2007).

  • B. Hyland et al., "Precision Branching-ratio Measurement for the Superallowed Beta(+) Emitter Ga-62 and Isospin-symmetry-breaking Corrections in A>= 62 Nuclei," Phys. Rev. Lett. 97, 102501 (2006).